X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=diff.c;h=374ecf3b486e218c52f94ba14481a715c19b80db;hb=0e1cfc52de002e2d9b0e6562e8672fee3bf45a67;hp=989dbc54cbb31c095cc45fb5bb74f62077f1c635;hpb=03f94ae9f909952ed5a78917ab319a312889354b;p=git.git diff --git a/diff.c b/diff.c index 989dbc54c..374ecf3b4 100644 --- a/diff.c +++ b/diff.c @@ -14,6 +14,7 @@ #include "userdiff.h" #include "sigchain.h" #include "submodule.h" +#include "ll-merge.h" #ifdef NO_FAST_WORKING_DIRECTORY #define FAST_WORKING_DIRECTORY 0 @@ -22,13 +23,16 @@ #endif static int diff_detect_rename_default; -static int diff_rename_limit_default = 200; +static int diff_rename_limit_default = 400; static int diff_suppress_blank_empty; int diff_use_color_default = -1; static const char *diff_word_regex_cfg; static const char *external_diff_cmd_cfg; int diff_auto_refresh_index = 1; static int diff_mnemonic_prefix; +static int diff_no_prefix; +static int diff_dirstat_permille_default = 30; +static struct diff_options default_diff_options; static char diff_colors[][COLOR_MAXLEN] = { GIT_COLOR_RESET, @@ -42,9 +46,6 @@ static char diff_colors[][COLOR_MAXLEN] = { GIT_COLOR_NORMAL, /* FUNCINFO */ }; -static void diff_filespec_load_driver(struct diff_filespec *one); -static char *run_textconv(const char *, struct diff_filespec *, size_t *); - static int parse_diff_color_slot(const char *var, int ofs) { if (!strcasecmp(var+ofs, "plain")) @@ -66,6 +67,58 @@ static int parse_diff_color_slot(const char *var, int ofs) return -1; } +static int parse_dirstat_params(struct diff_options *options, const char *params, + struct strbuf *errmsg) +{ + const char *p = params; + int p_len, ret = 0; + + while (*p) { + p_len = strchrnul(p, ',') - p; + if (!memcmp(p, "changes", p_len)) { + DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); + DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); + } else if (!memcmp(p, "lines", p_len)) { + DIFF_OPT_SET(options, DIRSTAT_BY_LINE); + DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); + } else if (!memcmp(p, "files", p_len)) { + DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); + DIFF_OPT_SET(options, DIRSTAT_BY_FILE); + } else if (!memcmp(p, "noncumulative", p_len)) { + DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); + } else if (!memcmp(p, "cumulative", p_len)) { + DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); + } else if (isdigit(*p)) { + char *end; + int permille = strtoul(p, &end, 10) * 10; + if (*end == '.' && isdigit(*++end)) { + /* only use first digit */ + permille += *end - '0'; + /* .. and ignore any further digits */ + while (isdigit(*++end)) + ; /* nothing */ + } + if (end - p == p_len) + options->dirstat_permille = permille; + else { + strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%.*s'\n"), + p_len, p); + ret++; + } + } else { + strbuf_addf(errmsg, _(" Unknown dirstat parameter '%.*s'\n"), + p_len, p); + ret++; + } + + p += p_len; + + if (*p) + p++; /* more parameters, swallow separator */ + } + return ret; +} + static int git_config_rename(const char *var, const char *value) { if (!value) @@ -84,7 +137,7 @@ static int git_config_rename(const char *var, const char *value) int git_diff_ui_config(const char *var, const char *value, void *cb) { if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { - diff_use_color_default = git_config_colorbool(var, value, -1); + diff_use_color_default = git_config_colorbool(var, value); return 0; } if (!strcmp(var, "diff.renames")) { @@ -99,11 +152,21 @@ int git_diff_ui_config(const char *var, const char *value, void *cb) diff_mnemonic_prefix = git_config_bool(var, value); return 0; } + if (!strcmp(var, "diff.noprefix")) { + diff_no_prefix = git_config_bool(var, value); + return 0; + } if (!strcmp(var, "diff.external")) return git_config_string(&external_diff_cmd_cfg, var, value); if (!strcmp(var, "diff.wordregex")) return git_config_string(&diff_word_regex_cfg, var, value); + if (!strcmp(var, "diff.ignoresubmodules")) + handle_ignore_submodules_arg(&default_diff_options, value); + + if (git_color_config(var, value, cb) < 0) + return -1; + return git_diff_basic_config(var, value, cb); } @@ -138,7 +201,21 @@ int git_diff_basic_config(const char *var, const char *value, void *cb) return 0; } - return git_color_default_config(var, value, cb); + if (!strcmp(var, "diff.dirstat")) { + struct strbuf errmsg = STRBUF_INIT; + default_diff_options.dirstat_permille = diff_dirstat_permille_default; + if (parse_dirstat_params(&default_diff_options, value, &errmsg)) + warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), + errmsg.buf); + strbuf_release(&errmsg); + diff_dirstat_permille_default = default_diff_options.dirstat_permille; + return 0; + } + + if (!prefixcmp(var, "submodule.")) + return parse_submodule_config_option(var, value); + + return git_default_config(var, value, cb); } static char *quote_two(const char *one, const char *two) @@ -192,8 +269,8 @@ struct emit_callback { sane_truncate_fn truncate; const char **label_path; struct diff_words_data *diff_words; + struct diff_options *opt; int *found_changesp; - FILE *file; struct strbuf *header; }; @@ -235,6 +312,15 @@ static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) return 0; } +/* like fill_mmfile, but only for size, so we can avoid retrieving blob */ +static unsigned long diff_filespec_size(struct diff_filespec *one) +{ + if (!DIFF_FILE_VALID(one)) + return 0; + diff_populate_filespec(one, 1); + return one->size; +} + static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) { char *ptr = mf->ptr; @@ -280,11 +366,19 @@ static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; } -static void emit_line_0(FILE *file, const char *set, const char *reset, +static void emit_line_0(struct diff_options *o, const char *set, const char *reset, int first, const char *line, int len) { int has_trailing_newline, has_trailing_carriage_return; int nofirst; + FILE *file = o->file; + + if (o->output_prefix) { + struct strbuf *msg = NULL; + msg = o->output_prefix(o, o->output_prefix_data); + assert(msg); + fwrite(msg->buf, msg->len, 1, file); + } if (len == 0) { has_trailing_newline = (first == '\n'); @@ -314,10 +408,10 @@ static void emit_line_0(FILE *file, const char *set, const char *reset, fputc('\n', file); } -static void emit_line(FILE *file, const char *set, const char *reset, +static void emit_line(struct diff_options *o, const char *set, const char *reset, const char *line, int len) { - emit_line_0(file, set, reset, line[0], line+1, len-1); + emit_line_0(o, set, reset, line[0], line+1, len-1); } static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) @@ -339,15 +433,15 @@ static void emit_add_line(const char *reset, const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); if (!*ws) - emit_line_0(ecbdata->file, set, reset, '+', line, len); + emit_line_0(ecbdata->opt, set, reset, '+', line, len); else if (new_blank_line_at_eof(ecbdata, line, len)) /* Blank line at EOF - paint '+' as well */ - emit_line_0(ecbdata->file, ws, reset, '+', line, len); + emit_line_0(ecbdata->opt, ws, reset, '+', line, len); else { /* Emit just the prefix, then the rest. */ - emit_line_0(ecbdata->file, set, reset, '+', "", 0); + emit_line_0(ecbdata->opt, set, reset, '+', "", 0); ws_check_emit(line, len, ecbdata->ws_rule, - ecbdata->file, set, reset, ws); + ecbdata->opt->file, set, reset, ws); } } @@ -360,6 +454,9 @@ static void emit_hunk_header(struct emit_callback *ecbdata, const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); static const char atat[2] = { '@', '@' }; const char *cp, *ep; + struct strbuf msgbuf = STRBUF_INIT; + int org_len = len; + int i = 1; /* * As a hunk header must begin with "@@ -, + @@", @@ -368,23 +465,42 @@ static void emit_hunk_header(struct emit_callback *ecbdata, if (len < 10 || memcmp(line, atat, 2) || !(ep = memmem(line + 2, len - 2, atat, 2))) { - emit_line(ecbdata->file, plain, reset, line, len); + emit_line(ecbdata->opt, plain, reset, line, len); return; } ep += 2; /* skip over @@ */ /* The hunk header in fraginfo color */ - emit_line(ecbdata->file, frag, reset, line, ep - line); + strbuf_add(&msgbuf, frag, strlen(frag)); + strbuf_add(&msgbuf, line, ep - line); + strbuf_add(&msgbuf, reset, strlen(reset)); + + /* + * trailing "\r\n" + */ + for ( ; i < 3; i++) + if (line[len - i] == '\r' || line[len - i] == '\n') + len--; /* blank before the func header */ for (cp = ep; ep - line < len; ep++) if (*ep != ' ' && *ep != '\t') break; - if (ep != cp) - emit_line(ecbdata->file, plain, reset, cp, ep - cp); + if (ep != cp) { + strbuf_add(&msgbuf, plain, strlen(plain)); + strbuf_add(&msgbuf, cp, ep - cp); + strbuf_add(&msgbuf, reset, strlen(reset)); + } - if (ep < line + len) - emit_line(ecbdata->file, func, reset, ep, line + len - ep); + if (ep < line + len) { + strbuf_add(&msgbuf, func, strlen(func)); + strbuf_add(&msgbuf, ep, line + len - ep); + strbuf_add(&msgbuf, reset, strlen(reset)); + } + + strbuf_add(&msgbuf, line + len, org_len - len); + emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); + strbuf_release(&msgbuf); } static struct diff_tempfile *claim_diff_tempfile(void) { @@ -444,7 +560,7 @@ static void emit_rewrite_lines(struct emit_callback *ecb, len = endp ? (endp - data + 1) : size; if (prefix != '+') { ecb->lno_in_preimage++; - emit_line_0(ecb->file, old, reset, '-', + emit_line_0(ecb->opt, old, reset, '-', data, len); } else { ecb->lno_in_postimage++; @@ -456,7 +572,7 @@ static void emit_rewrite_lines(struct emit_callback *ecb, if (!endp) { const char *plain = diff_get_color(ecb->color_diff, DIFF_PLAIN); - emit_line_0(ecb->file, plain, reset, '\\', + emit_line_0(ecb->opt, plain, reset, '\\', nneof, strlen(nneof)); } } @@ -465,21 +581,27 @@ static void emit_rewrite_diff(const char *name_a, const char *name_b, struct diff_filespec *one, struct diff_filespec *two, - const char *textconv_one, - const char *textconv_two, + struct userdiff_driver *textconv_one, + struct userdiff_driver *textconv_two, struct diff_options *o) { int lc_a, lc_b; - int color_diff = DIFF_OPT_TST(o, COLOR_DIFF); const char *name_a_tab, *name_b_tab; - const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO); - const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO); - const char *reset = diff_get_color(color_diff, DIFF_RESET); + const char *metainfo = diff_get_color(o->use_color, DIFF_METAINFO); + const char *fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); + const char *reset = diff_get_color(o->use_color, DIFF_RESET); static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; const char *a_prefix, *b_prefix; - const char *data_one, *data_two; + char *data_one, *data_two; size_t size_one, size_two; struct emit_callback ecbdata; + char *line_prefix = ""; + struct strbuf *msgbuf; + + if (o && o->output_prefix) { + msgbuf = o->output_prefix(o, o->output_prefix_data); + line_prefix = msgbuf->buf; + } if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { a_prefix = o->b_prefix; @@ -499,32 +621,14 @@ static void emit_rewrite_diff(const char *name_a, quote_two_c_style(&a_name, a_prefix, name_a, 0); quote_two_c_style(&b_name, b_prefix, name_b, 0); - diff_populate_filespec(one, 0); - diff_populate_filespec(two, 0); - if (textconv_one) { - data_one = run_textconv(textconv_one, one, &size_one); - if (!data_one) - die("unable to read files to diff"); - } - else { - data_one = one->data; - size_one = one->size; - } - if (textconv_two) { - data_two = run_textconv(textconv_two, two, &size_two); - if (!data_two) - die("unable to read files to diff"); - } - else { - data_two = two->data; - size_two = two->size; - } + size_one = fill_textconv(textconv_one, one, &data_one); + size_two = fill_textconv(textconv_two, two, &data_two); memset(&ecbdata, 0, sizeof(ecbdata)); - ecbdata.color_diff = color_diff; + ecbdata.color_diff = want_color(o->use_color); ecbdata.found_changesp = &o->found_changes; ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); - ecbdata.file = o->file; + ecbdata.opt = o; if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { mmfile_t mf1, mf2; mf1.ptr = (char *)data_one; @@ -539,17 +643,25 @@ static void emit_rewrite_diff(const char *name_a, lc_a = count_lines(data_one, size_one); lc_b = count_lines(data_two, size_two); fprintf(o->file, - "%s--- %s%s%s\n%s+++ %s%s%s\n%s@@ -", - metainfo, a_name.buf, name_a_tab, reset, - metainfo, b_name.buf, name_b_tab, reset, fraginfo); - print_line_count(o->file, lc_a); + "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", + line_prefix, metainfo, a_name.buf, name_a_tab, reset, + line_prefix, metainfo, b_name.buf, name_b_tab, reset, + line_prefix, fraginfo); + if (!o->irreversible_delete) + print_line_count(o->file, lc_a); + else + fprintf(o->file, "?,?"); fprintf(o->file, " +"); print_line_count(o->file, lc_b); fprintf(o->file, " @@%s\n", reset); - if (lc_a) + if (lc_a && !o->irreversible_delete) emit_rewrite_lines(&ecbdata, '-', data_one, size_one); if (lc_b) emit_rewrite_lines(&ecbdata, '+', data_two, size_two); + if (textconv_one) + free((char *)data_one); + if (textconv_two) + free((char *)data_two); } struct diff_words_buffer { @@ -572,23 +684,132 @@ static void diff_words_append(char *line, unsigned long len, buffer->text.ptr[buffer->text.size] = '\0'; } +struct diff_words_style_elem { + const char *prefix; + const char *suffix; + const char *color; /* NULL; filled in by the setup code if + * color is enabled */ +}; + +struct diff_words_style { + enum diff_words_type type; + struct diff_words_style_elem new, old, ctx; + const char *newline; +}; + +static struct diff_words_style diff_words_styles[] = { + { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, + { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, + { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } +}; + struct diff_words_data { struct diff_words_buffer minus, plus; const char *current_plus; - FILE *file; + int last_minus; + struct diff_options *opt; regex_t *word_regex; + enum diff_words_type type; + struct diff_words_style *style; }; +static int fn_out_diff_words_write_helper(FILE *fp, + struct diff_words_style_elem *st_el, + const char *newline, + size_t count, const char *buf, + const char *line_prefix) +{ + int print = 0; + + while (count) { + char *p = memchr(buf, '\n', count); + if (print) + fputs(line_prefix, fp); + if (p != buf) { + if (st_el->color && fputs(st_el->color, fp) < 0) + return -1; + if (fputs(st_el->prefix, fp) < 0 || + fwrite(buf, p ? p - buf : count, 1, fp) != 1 || + fputs(st_el->suffix, fp) < 0) + return -1; + if (st_el->color && *st_el->color + && fputs(GIT_COLOR_RESET, fp) < 0) + return -1; + } + if (!p) + return 0; + if (fputs(newline, fp) < 0) + return -1; + count -= p + 1 - buf; + buf = p + 1; + print = 1; + } + return 0; +} + +/* + * '--color-words' algorithm can be described as: + * + * 1. collect a the minus/plus lines of a diff hunk, divided into + * minus-lines and plus-lines; + * + * 2. break both minus-lines and plus-lines into words and + * place them into two mmfile_t with one word for each line; + * + * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; + * + * And for the common parts of the both file, we output the plus side text. + * diff_words->current_plus is used to trace the current position of the plus file + * which printed. diff_words->last_minus is used to trace the last minus word + * printed. + * + * For '--graph' to work with '--color-words', we need to output the graph prefix + * on each line of color words output. Generally, there are two conditions on + * which we should output the prefix. + * + * 1. diff_words->last_minus == 0 && + * diff_words->current_plus == diff_words->plus.text.ptr + * + * that is: the plus text must start as a new line, and if there is no minus + * word printed, a graph prefix must be printed. + * + * 2. diff_words->current_plus > diff_words->plus.text.ptr && + * *(diff_words->current_plus - 1) == '\n' + * + * that is: a graph prefix must be printed following a '\n' + */ +static int color_words_output_graph_prefix(struct diff_words_data *diff_words) +{ + if ((diff_words->last_minus == 0 && + diff_words->current_plus == diff_words->plus.text.ptr) || + (diff_words->current_plus > diff_words->plus.text.ptr && + *(diff_words->current_plus - 1) == '\n')) { + return 1; + } else { + return 0; + } +} + static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) { struct diff_words_data *diff_words = priv; + struct diff_words_style *style = diff_words->style; int minus_first, minus_len, plus_first, plus_len; const char *minus_begin, *minus_end, *plus_begin, *plus_end; + struct diff_options *opt = diff_words->opt; + struct strbuf *msgbuf; + char *line_prefix = ""; if (line[0] != '@' || parse_hunk_header(line, len, &minus_first, &minus_len, &plus_first, &plus_len)) return; + assert(opt); + if (opt->output_prefix) { + msgbuf = opt->output_prefix(opt, opt->output_prefix_data); + line_prefix = msgbuf->buf; + } + /* POSIX requires that first be decremented by one if len == 0... */ if (minus_len) { minus_begin = diff_words->minus.orig[minus_first].begin; @@ -604,20 +825,32 @@ static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) } else plus_begin = plus_end = diff_words->plus.orig[plus_first].end; - if (diff_words->current_plus != plus_begin) - fwrite(diff_words->current_plus, - plus_begin - diff_words->current_plus, 1, - diff_words->file); - if (minus_begin != minus_end) - color_fwrite_lines(diff_words->file, - diff_get_color(1, DIFF_FILE_OLD), - minus_end - minus_begin, minus_begin); - if (plus_begin != plus_end) - color_fwrite_lines(diff_words->file, - diff_get_color(1, DIFF_FILE_NEW), - plus_end - plus_begin, plus_begin); + if (color_words_output_graph_prefix(diff_words)) { + fputs(line_prefix, diff_words->opt->file); + } + if (diff_words->current_plus != plus_begin) { + fn_out_diff_words_write_helper(diff_words->opt->file, + &style->ctx, style->newline, + plus_begin - diff_words->current_plus, + diff_words->current_plus, line_prefix); + if (*(plus_begin - 1) == '\n') + fputs(line_prefix, diff_words->opt->file); + } + if (minus_begin != minus_end) { + fn_out_diff_words_write_helper(diff_words->opt->file, + &style->old, style->newline, + minus_end - minus_begin, minus_begin, + line_prefix); + } + if (plus_begin != plus_end) { + fn_out_diff_words_write_helper(diff_words->opt->file, + &style->new, style->newline, + plus_end - plus_begin, plus_begin, + line_prefix); + } diff_words->current_plus = plus_end; + diff_words->last_minus = minus_first; } /* This function starts looking at *begin, and returns 0 iff a word was found. */ @@ -695,37 +928,54 @@ static void diff_words_show(struct diff_words_data *diff_words) { xpparam_t xpp; xdemitconf_t xecfg; - xdemitcb_t ecb; mmfile_t minus, plus; + struct diff_words_style *style = diff_words->style; + + struct diff_options *opt = diff_words->opt; + struct strbuf *msgbuf; + char *line_prefix = ""; + + assert(opt); + if (opt->output_prefix) { + msgbuf = opt->output_prefix(opt, opt->output_prefix_data); + line_prefix = msgbuf->buf; + } /* special case: only removal */ if (!diff_words->plus.text.size) { - color_fwrite_lines(diff_words->file, - diff_get_color(1, DIFF_FILE_OLD), - diff_words->minus.text.size, diff_words->minus.text.ptr); + fputs(line_prefix, diff_words->opt->file); + fn_out_diff_words_write_helper(diff_words->opt->file, + &style->old, style->newline, + diff_words->minus.text.size, + diff_words->minus.text.ptr, line_prefix); diff_words->minus.text.size = 0; return; } diff_words->current_plus = diff_words->plus.text.ptr; + diff_words->last_minus = 0; memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); - xpp.flags = XDF_NEED_MINIMAL; + xpp.flags = 0; /* as only the hunk header will be parsed, we need a 0-context */ xecfg.ctxlen = 0; xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, - &xpp, &xecfg, &ecb); + &xpp, &xecfg); free(minus.ptr); free(plus.ptr); if (diff_words->current_plus != diff_words->plus.text.ptr + - diff_words->plus.text.size) - fwrite(diff_words->current_plus, + diff_words->plus.text.size) { + if (color_words_output_graph_prefix(diff_words)) + fputs(line_prefix, diff_words->opt->file); + fn_out_diff_words_write_helper(diff_words->opt->file, + &style->ctx, style->newline, diff_words->plus.text.ptr + diff_words->plus.text.size - - diff_words->current_plus, 1, - diff_words->file); + - diff_words->current_plus, diff_words->current_plus, + line_prefix); + } diff_words->minus.text.size = diff_words->plus.text.size = 0; } @@ -745,7 +995,10 @@ static void free_diff_words_data(struct emit_callback *ecbdata) free (ecbdata->diff_words->minus.orig); free (ecbdata->diff_words->plus.text.ptr); free (ecbdata->diff_words->plus.orig); - free(ecbdata->diff_words->word_regex); + if (ecbdata->diff_words->word_regex) { + regfree(ecbdata->diff_words->word_regex); + free(ecbdata->diff_words->word_regex); + } free(ecbdata->diff_words); ecbdata->diff_words = NULL; } @@ -753,7 +1006,7 @@ static void free_diff_words_data(struct emit_callback *ecbdata) const char *diff_get_color(int diff_use_color, enum color_diff ix) { - if (diff_use_color) + if (want_color(diff_use_color)) return diff_colors[ix]; return ""; } @@ -797,9 +1050,17 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); + struct diff_options *o = ecbdata->opt; + char *line_prefix = ""; + struct strbuf *msgbuf; + + if (o && o->output_prefix) { + msgbuf = o->output_prefix(o, o->output_prefix_data); + line_prefix = msgbuf->buf; + } if (ecbdata->header) { - fprintf(ecbdata->file, "%s", ecbdata->header->buf); + fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); strbuf_reset(ecbdata->header); ecbdata->header = NULL; } @@ -811,10 +1072,10 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; - fprintf(ecbdata->file, "%s--- %s%s%s\n", - meta, ecbdata->label_path[0], reset, name_a_tab); - fprintf(ecbdata->file, "%s+++ %s%s%s\n", - meta, ecbdata->label_path[1], reset, name_b_tab); + fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", + line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); + fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", + line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; } @@ -831,12 +1092,15 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) find_lno(line, ecbdata); emit_hunk_header(ecbdata, line, len); if (line[len-1] != '\n') - putc('\n', ecbdata->file); + putc('\n', ecbdata->opt->file); return; } if (len < 1) { - emit_line(ecbdata->file, reset, reset, line, len); + emit_line(ecbdata->opt, reset, reset, line, len); + if (ecbdata->diff_words + && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) + fputs("~\n", ecbdata->opt->file); return; } @@ -851,9 +1115,21 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) return; } diff_words_flush(ecbdata); - line++; - len--; - emit_line(ecbdata->file, plain, reset, line, len); + if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { + emit_line(ecbdata->opt, plain, reset, line, len); + fputs("~\n", ecbdata->opt->file); + } else { + /* + * Skip the prefix character, if any. With + * diff_suppress_blank_empty, there may be + * none. + */ + if (line[0] != '\n') { + line++; + len--; + } + emit_line(ecbdata->opt, plain, reset, line, len); + } return; } @@ -864,7 +1140,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) ecbdata->lno_in_preimage++; if (line[0] == ' ') ecbdata->lno_in_postimage++; - emit_line(ecbdata->file, color, reset, line, len); + emit_line(ecbdata->opt, color, reset, line, len); } else { ecbdata->lno_in_postimage++; emit_add_line(reset, ecbdata, line + 1, len - 1); @@ -948,7 +1224,7 @@ struct diffstat_t { unsigned is_unmerged:1; unsigned is_binary:1; unsigned is_renamed:1; - unsigned int added, deleted; + uintmax_t added, deleted; } **files; }; @@ -1040,16 +1316,25 @@ static void fill_print_name(struct diffstat_file *file) static void show_stats(struct diffstat_t *data, struct diff_options *options) { int i, len, add, del, adds = 0, dels = 0; - int max_change = 0, max_len = 0; + uintmax_t max_change = 0, max_len = 0; int total_files = data->nr; - int width, name_width; - const char *reset, *set, *add_c, *del_c; + int width, name_width, count; + const char *reset, *add_c, *del_c; + const char *line_prefix = ""; + int extra_shown = 0; + struct strbuf *msg = NULL; if (data->nr == 0) return; + if (options->output_prefix) { + msg = options->output_prefix(options, options->output_prefix_data); + line_prefix = msg->buf; + } + width = options->stat_width ? options->stat_width : 80; name_width = options->stat_name_width ? options->stat_name_width : 50; + count = options->stat_count ? options->stat_count : data->nr; /* Sanity: give at least 5 columns to the graph, * but leave at least 10 columns for the name. @@ -1063,13 +1348,17 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) /* Find the longest filename and max number of changes */ reset = diff_get_color_opt(options, DIFF_RESET); - set = diff_get_color_opt(options, DIFF_PLAIN); add_c = diff_get_color_opt(options, DIFF_FILE_NEW); del_c = diff_get_color_opt(options, DIFF_FILE_OLD); - for (i = 0; i < data->nr; i++) { + for (i = 0; (i < count) && (i < data->nr); i++) { struct diffstat_file *file = data->files[i]; - int change = file->added + file->deleted; + uintmax_t change = file->added + file->deleted; + if (!data->files[i]->is_renamed && + (change == 0)) { + count++; /* not shown == room for one more */ + continue; + } fill_print_name(file); len = strlen(file->print_name); if (max_len < len) @@ -1080,6 +1369,7 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) if (max_change < change) max_change = change; } + count = i; /* min(count, data->nr) */ /* Compute the width of the graph part; * 10 is for one blank at the beginning of the line plus @@ -1094,13 +1384,18 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) else width = max_change; - for (i = 0; i < data->nr; i++) { + for (i = 0; i < count; i++) { const char *prefix = ""; char *name = data->files[i]->print_name; - int added = data->files[i]->added; - int deleted = data->files[i]->deleted; + uintmax_t added = data->files[i]->added; + uintmax_t deleted = data->files[i]->deleted; int name_len; + if (!data->files[i]->is_renamed && + (added + deleted == 0)) { + total_files--; + continue; + } /* * "scale" the filename */ @@ -1117,25 +1412,24 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) } if (data->files[i]->is_binary) { + fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len); fprintf(options->file, " Bin "); - fprintf(options->file, "%s%d%s", del_c, deleted, reset); + fprintf(options->file, "%s%"PRIuMAX"%s", + del_c, deleted, reset); fprintf(options->file, " -> "); - fprintf(options->file, "%s%d%s", add_c, added, reset); + fprintf(options->file, "%s%"PRIuMAX"%s", + add_c, added, reset); fprintf(options->file, " bytes"); fprintf(options->file, "\n"); continue; } else if (data->files[i]->is_unmerged) { + fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len); fprintf(options->file, " Unmerged\n"); continue; } - else if (!data->files[i]->is_renamed && - (added + deleted == 0)) { - total_files--; - continue; - } /* * scale the add/delete @@ -1149,13 +1443,29 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) add = scale_linear(add, width, max_change); del = scale_linear(del, width, max_change); } + fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len); - fprintf(options->file, "%5d%s", added + deleted, + fprintf(options->file, "%5"PRIuMAX"%s", added + deleted, added + deleted ? " " : ""); show_graph(options->file, '+', add, add_c, reset); show_graph(options->file, '-', del, del_c, reset); fprintf(options->file, "\n"); } + for (i = count; i < data->nr; i++) { + uintmax_t added = data->files[i]->added; + uintmax_t deleted = data->files[i]->deleted; + if (!data->files[i]->is_renamed && + (added + deleted == 0)) { + total_files--; + continue; + } + adds += added; + dels += deleted; + if (!extra_shown) + fprintf(options->file, "%s ...\n", line_prefix); + extra_shown = 1; + } + fprintf(options->file, "%s", line_prefix); fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", total_files, adds, dels); @@ -1182,6 +1492,12 @@ static void show_shortstats(struct diffstat_t *data, struct diff_options *option } } } + if (options->output_prefix) { + struct strbuf *msg = NULL; + msg = options->output_prefix(options, + options->output_prefix_data); + fprintf(options->file, "%s", msg->buf); + } fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", total_files, adds, dels); } @@ -1196,11 +1512,19 @@ static void show_numstat(struct diffstat_t *data, struct diff_options *options) for (i = 0; i < data->nr; i++) { struct diffstat_file *file = data->files[i]; + if (options->output_prefix) { + struct strbuf *msg = NULL; + msg = options->output_prefix(options, + options->output_prefix_data); + fprintf(options->file, "%s", msg->buf); + } + if (file->is_binary) fprintf(options->file, "-\t-\t"); else fprintf(options->file, - "%d\t%d\t", file->added, file->deleted); + "%"PRIuMAX"\t%"PRIuMAX"\t", + file->added, file->deleted); if (options->line_termination) { fill_print_name(file); if (!file->is_renamed) @@ -1227,13 +1551,21 @@ struct dirstat_file { struct dirstat_dir { struct dirstat_file *files; - int alloc, nr, percent, cumulative; + int alloc, nr, permille, cumulative; }; -static long gather_dirstat(FILE *file, struct dirstat_dir *dir, unsigned long changed, const char *base, int baselen) +static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, + unsigned long changed, const char *base, int baselen) { unsigned long this_dir = 0; unsigned int sources = 0; + const char *line_prefix = ""; + struct strbuf *msg = NULL; + + if (opt->output_prefix) { + msg = opt->output_prefix(opt, opt->output_prefix_data); + line_prefix = msg->buf; + } while (dir->nr) { struct dirstat_file *f = dir->files; @@ -1248,7 +1580,7 @@ static long gather_dirstat(FILE *file, struct dirstat_dir *dir, unsigned long ch slash = strchr(f->name + baselen, '/'); if (slash) { int newbaselen = slash + 1 - f->name; - this = gather_dirstat(file, dir, changed, f->name, newbaselen); + this = gather_dirstat(opt, dir, changed, f->name, newbaselen); sources++; } else { this = f->changed; @@ -1266,11 +1598,11 @@ static long gather_dirstat(FILE *file, struct dirstat_dir *dir, unsigned long ch * under this directory (sources == 1). */ if (baselen && sources != 1) { - int permille = this_dir * 1000 / changed; - if (permille) { - int percent = permille / 10; - if (percent >= dir->percent) { - fprintf(file, "%4d.%01d%% %.*s\n", percent, permille % 10, baselen, base); + if (this_dir) { + int permille = this_dir * 1000 / changed; + if (permille >= dir->permille) { + fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, + permille / 10, permille % 10, baselen, base); if (!dir->cumulative) return 0; } @@ -1296,7 +1628,7 @@ static void show_dirstat(struct diff_options *options) dir.files = NULL; dir.alloc = 0; dir.nr = 0; - dir.percent = options->dirstat_percent; + dir.permille = options->dirstat_permille; dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); changed = 0; @@ -1304,8 +1636,36 @@ static void show_dirstat(struct diff_options *options) struct diff_filepair *p = q->queue[i]; const char *name; unsigned long copied, added, damage; + int content_changed; + + name = p->two->path ? p->two->path : p->one->path; + + if (p->one->sha1_valid && p->two->sha1_valid) + content_changed = hashcmp(p->one->sha1, p->two->sha1); + else + content_changed = 1; - name = p->one->path ? p->one->path : p->two->path; + if (!content_changed) { + /* + * The SHA1 has not changed, so pre-/post-content is + * identical. We can therefore skip looking at the + * file contents altogether. + */ + damage = 0; + goto found_damage; + } + + if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { + /* + * In --dirstat-by-file mode, we don't really need to + * look at the actual file contents at all. + * The fact that the SHA1 changed is enough for us to + * add this file to the list of results + * (with each file contributing equal damage). + */ + damage = 1; + goto found_damage; + } if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { diff_populate_filespec(p->one, 0); @@ -1329,14 +1689,18 @@ static void show_dirstat(struct diff_options *options) /* * Original minus copied is the removed material, * added is the new material. They are both damages - * made to the preimage. In --dirstat-by-file mode, count - * damaged files, not damaged lines. This is done by - * counting only a single damaged line per file. + * made to the preimage. + * If the resulting damage is zero, we know that + * diffcore_count_changes() considers the two entries to + * be identical, but since content_changed is true, we + * know that there must have been _some_ kind of change, + * so we force all entries to have damage > 0. */ damage = (p->one->size - copied) + added; - if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0) + if (!damage) damage = 1; +found_damage: ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); dir.files[dir.nr].name = name; dir.files[dir.nr].changed = damage; @@ -1350,7 +1714,51 @@ static void show_dirstat(struct diff_options *options) /* Show all directories with more than x% of the changes */ qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); - gather_dirstat(options->file, &dir, changed, "", 0); + gather_dirstat(options, &dir, changed, "", 0); +} + +static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) +{ + int i; + unsigned long changed; + struct dirstat_dir dir; + + if (data->nr == 0) + return; + + dir.files = NULL; + dir.alloc = 0; + dir.nr = 0; + dir.permille = options->dirstat_permille; + dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); + + changed = 0; + for (i = 0; i < data->nr; i++) { + struct diffstat_file *file = data->files[i]; + unsigned long damage = file->added + file->deleted; + if (file->is_binary) + /* + * binary files counts bytes, not lines. Must find some + * way to normalize binary bytes vs. textual lines. + * The following heuristic assumes that there are 64 + * bytes per "line". + * This is stupid and ugly, but very cheap... + */ + damage = (damage + 63) / 64; + ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); + dir.files[dir.nr].name = file->name; + dir.files[dir.nr].changed = damage; + changed += damage; + dir.nr++; + } + + /* This can happen even with many files, if everything was renames */ + if (!changed) + return; + + /* Show all directories with more than x% of the changes */ + qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); + gather_dirstat(options, &dir, changed, "", 0); } static void free_diffstat_info(struct diffstat_t *diffstat) @@ -1370,67 +1778,71 @@ static void free_diffstat_info(struct diffstat_t *diffstat) struct checkdiff_t { const char *filename; int lineno; + int conflict_marker_size; struct diff_options *o; unsigned ws_rule; unsigned status; }; -static int is_conflict_marker(const char *line, unsigned long len) +static int is_conflict_marker(const char *line, int marker_size, unsigned long len) { char firstchar; int cnt; - if (len < 8) + if (len < marker_size + 1) return 0; firstchar = line[0]; switch (firstchar) { - case '=': case '>': case '<': + case '=': case '>': case '<': case '|': break; default: return 0; } - for (cnt = 1; cnt < 7; cnt++) + for (cnt = 1; cnt < marker_size; cnt++) if (line[cnt] != firstchar) return 0; - /* line[0] thru line[6] are same as firstchar */ - if (firstchar == '=') { - /* divider between ours and theirs? */ - if (len != 8 || line[7] != '\n') - return 0; - } else if (len < 8 || !isspace(line[7])) { - /* not divider before ours nor after theirs */ + /* line[1] thru line[marker_size-1] are same as firstchar */ + if (len < marker_size + 1 || !isspace(line[marker_size])) return 0; - } return 1; } static void checkdiff_consume(void *priv, char *line, unsigned long len) { struct checkdiff_t *data = priv; - int color_diff = DIFF_OPT_TST(data->o, COLOR_DIFF); - const char *ws = diff_get_color(color_diff, DIFF_WHITESPACE); - const char *reset = diff_get_color(color_diff, DIFF_RESET); - const char *set = diff_get_color(color_diff, DIFF_FILE_NEW); + int marker_size = data->conflict_marker_size; + const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); + const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); + const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); char *err; + char *line_prefix = ""; + struct strbuf *msgbuf; + + assert(data->o); + if (data->o->output_prefix) { + msgbuf = data->o->output_prefix(data->o, + data->o->output_prefix_data); + line_prefix = msgbuf->buf; + } if (line[0] == '+') { unsigned bad; data->lineno++; - if (is_conflict_marker(line + 1, len - 1)) { + if (is_conflict_marker(line + 1, marker_size, len - 1)) { data->status |= 1; fprintf(data->o->file, - "%s:%d: leftover conflict marker\n", - data->filename, data->lineno); + "%s%s:%d: leftover conflict marker\n", + line_prefix, data->filename, data->lineno); } bad = ws_check(line + 1, len - 1, data->ws_rule); if (!bad) return; data->status |= bad; err = whitespace_error_string(bad); - fprintf(data->o->file, "%s:%d: %s.\n", - data->filename, data->lineno, err); + fprintf(data->o->file, "%s%s:%d: %s.\n", + line_prefix, data->filename, data->lineno, err); free(err); - emit_line(data->o->file, set, reset, line, 1); + emit_line(data->o, set, reset, line, 1); ws_check_emit(line + 1, len - 1, data->ws_rule, data->o->file, set, reset, ws); } else if (line[0] == ' ') { @@ -1450,25 +1862,25 @@ static unsigned char *deflate_it(char *data, { int bound; unsigned char *deflated; - z_stream stream; + git_zstream stream; memset(&stream, 0, sizeof(stream)); - deflateInit(&stream, zlib_compression_level); - bound = deflateBound(&stream, size); + git_deflate_init(&stream, zlib_compression_level); + bound = git_deflate_bound(&stream, size); deflated = xmalloc(bound); stream.next_out = deflated; stream.avail_out = bound; stream.next_in = (unsigned char *)data; stream.avail_in = size; - while (deflate(&stream, Z_FINISH) == Z_OK) + while (git_deflate(&stream, Z_FINISH) == Z_OK) ; /* nothing */ - deflateEnd(&stream); + git_deflate_end(&stream); *result_size = stream.total_out; return deflated; } -static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two) +static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) { void *cp; void *delta; @@ -1497,13 +1909,13 @@ static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two) } if (delta && delta_size < deflate_size) { - fprintf(file, "delta %lu\n", orig_size); + fprintf(file, "%sdelta %lu\n", prefix, orig_size); free(deflated); data = delta; data_size = delta_size; } else { - fprintf(file, "literal %lu\n", two->size); + fprintf(file, "%sliteral %lu\n", prefix, two->size); free(delta); data = deflated; data_size = deflate_size; @@ -1521,24 +1933,31 @@ static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two) line[0] = bytes - 26 + 'a' - 1; encode_85(line + 1, cp, bytes); cp = (char *) cp + bytes; + fprintf(file, "%s", prefix); fputs(line, file); fputc('\n', file); } - fprintf(file, "\n"); + fprintf(file, "%s\n", prefix); free(data); } -static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two) +static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) { - fprintf(file, "GIT binary patch\n"); - emit_binary_diff_body(file, one, two); - emit_binary_diff_body(file, two, one); + fprintf(file, "%sGIT binary patch\n", prefix); + emit_binary_diff_body(file, one, two, prefix); + emit_binary_diff_body(file, two, one, prefix); } static void diff_filespec_load_driver(struct diff_filespec *one) { - if (!one->driver) + /* Use already-loaded driver */ + if (one->driver) + return; + + if (S_ISREG(one->mode)) one->driver = userdiff_find_by_path(one->path); + + /* Fallback to default settings */ if (!one->driver) one->driver = userdiff_find_by_name("default"); } @@ -1582,14 +2001,13 @@ void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const options->b_prefix = b; } -static const char *get_textconv(struct diff_filespec *one) +struct userdiff_driver *get_textconv(struct diff_filespec *one) { if (!DIFF_FILE_VALID(one)) return NULL; - if (!S_ISREG(one->mode)) - return NULL; + diff_filespec_load_driver(one); - return one->driver->textconv; + return userdiff_get_textconv(one->driver); } static void builtin_diff(const char *name_a, @@ -1597,6 +2015,7 @@ static void builtin_diff(const char *name_a, struct diff_filespec *one, struct diff_filespec *two, const char *xfrm_msg, + int must_show_header, struct diff_options *o, int complete_rewrite) { @@ -1606,8 +2025,16 @@ static void builtin_diff(const char *name_a, const char *set = diff_get_color_opt(o, DIFF_METAINFO); const char *reset = diff_get_color_opt(o, DIFF_RESET); const char *a_prefix, *b_prefix; - const char *textconv_one = NULL, *textconv_two = NULL; + struct userdiff_driver *textconv_one = NULL; + struct userdiff_driver *textconv_two = NULL; struct strbuf header = STRBUF_INIT; + struct strbuf *msgbuf; + char *line_prefix = ""; + + if (o->output_prefix) { + msgbuf = o->output_prefix(o, o->output_prefix_data); + line_prefix = msgbuf->buf; + } if (DIFF_OPT_TST(o, SUBMODULE_LOG) && (!one->mode || S_ISGITLINK(one->mode)) && @@ -1642,25 +2069,28 @@ static void builtin_diff(const char *name_a, b_two = quote_two(b_prefix, name_b + (*name_b == '/')); lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; - strbuf_addf(&header, "%sdiff --git %s %s%s\n", set, a_one, b_two, reset); + strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, set, a_one, b_two, reset); if (lbl[0][0] == '/') { /* /dev/null */ - strbuf_addf(&header, "%snew file mode %06o%s\n", set, two->mode, reset); - if (xfrm_msg && xfrm_msg[0]) - strbuf_addf(&header, "%s%s%s\n", set, xfrm_msg, reset); + strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, set, two->mode, reset); + if (xfrm_msg) + strbuf_addstr(&header, xfrm_msg); + must_show_header = 1; } else if (lbl[1][0] == '/') { - strbuf_addf(&header, "%sdeleted file mode %06o%s\n", set, one->mode, reset); - if (xfrm_msg && xfrm_msg[0]) - strbuf_addf(&header, "%s%s%s\n", set, xfrm_msg, reset); + strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, set, one->mode, reset); + if (xfrm_msg) + strbuf_addstr(&header, xfrm_msg); + must_show_header = 1; } else { if (one->mode != two->mode) { - strbuf_addf(&header, "%sold mode %06o%s\n", set, one->mode, reset); - strbuf_addf(&header, "%snew mode %06o%s\n", set, two->mode, reset); + strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, set, one->mode, reset); + strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, set, two->mode, reset); + must_show_header = 1; } - if (xfrm_msg && xfrm_msg[0]) - strbuf_addf(&header, "%s%s%s\n", set, xfrm_msg, reset); + if (xfrm_msg) + strbuf_addstr(&header, xfrm_msg); /* * we do not run diff between different kind @@ -1680,53 +2110,45 @@ static void builtin_diff(const char *name_a, } } - if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) - die("unable to read files to diff"); - - if (!DIFF_OPT_TST(o, TEXT) && - ( (diff_filespec_is_binary(one) && !textconv_one) || - (diff_filespec_is_binary(two) && !textconv_two) )) { + if (o->irreversible_delete && lbl[1][0] == '/') { + fprintf(o->file, "%s", header.buf); + strbuf_reset(&header); + goto free_ab_and_return; + } else if (!DIFF_OPT_TST(o, TEXT) && + ( (!textconv_one && diff_filespec_is_binary(one)) || + (!textconv_two && diff_filespec_is_binary(two)) )) { + if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) + die("unable to read files to diff"); /* Quite common confusing case */ if (mf1.size == mf2.size && - !memcmp(mf1.ptr, mf2.ptr, mf1.size)) + !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { + if (must_show_header) + fprintf(o->file, "%s", header.buf); goto free_ab_and_return; + } fprintf(o->file, "%s", header.buf); strbuf_reset(&header); if (DIFF_OPT_TST(o, BINARY)) - emit_binary_diff(o->file, &mf1, &mf2); + emit_binary_diff(o->file, &mf1, &mf2, line_prefix); else - fprintf(o->file, "Binary files %s and %s differ\n", - lbl[0], lbl[1]); + fprintf(o->file, "%sBinary files %s and %s differ\n", + line_prefix, lbl[0], lbl[1]); o->found_changes = 1; - } - else { + } else { /* Crazy xdl interfaces.. */ const char *diffopts = getenv("GIT_DIFF_OPTS"); xpparam_t xpp; xdemitconf_t xecfg; - xdemitcb_t ecb; struct emit_callback ecbdata; const struct userdiff_funcname *pe; - if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS)) { + if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS) || must_show_header) { fprintf(o->file, "%s", header.buf); strbuf_reset(&header); } - if (textconv_one) { - size_t size; - mf1.ptr = run_textconv(textconv_one, one, &size); - if (!mf1.ptr) - die("unable to read files to diff"); - mf1.size = size; - } - if (textconv_two) { - size_t size; - mf2.ptr = run_textconv(textconv_two, two, &size); - if (!mf2.ptr) - die("unable to read files to diff"); - mf2.size = size; - } + mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); + mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); pe = diff_funcname_pattern(one); if (!pe) @@ -1736,17 +2158,19 @@ static void builtin_diff(const char *name_a, memset(&xecfg, 0, sizeof(xecfg)); memset(&ecbdata, 0, sizeof(ecbdata)); ecbdata.label_path = lbl; - ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); + ecbdata.color_diff = want_color(o->use_color); ecbdata.found_changesp = &o->found_changes; ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); if (ecbdata.ws_rule & WS_BLANK_AT_EOF) check_blank_at_eof(&mf1, &mf2, &ecbdata); - ecbdata.file = o->file; + ecbdata.opt = o; ecbdata.header = header.len ? &header : NULL; - xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; + xpp.flags = o->xdl_opts; xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; xecfg.flags = XDL_EMIT_FUNCNAMES; + if (DIFF_OPT_TST(o, FUNCCONTEXT)) + xecfg.flags |= XDL_EMIT_FUNCCONTEXT; if (pe) xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); if (!diffopts) @@ -1755,10 +2179,13 @@ static void builtin_diff(const char *name_a, xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); else if (!prefixcmp(diffopts, "-u")) xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); - if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) { + if (o->word_diff) { + int i; + ecbdata.diff_words = xcalloc(1, sizeof(struct diff_words_data)); - ecbdata.diff_words->file = o->file; + ecbdata.diff_words->type = o->word_diff; + ecbdata.diff_words->opt = o; if (!o->word_regex) o->word_regex = userdiff_word_regex(one); if (!o->word_regex) @@ -1774,10 +2201,23 @@ static void builtin_diff(const char *name_a, die ("Invalid regular expression: %s", o->word_regex); } + for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { + if (o->word_diff == diff_words_styles[i].type) { + ecbdata.diff_words->style = + &diff_words_styles[i]; + break; + } + } + if (want_color(o->use_color)) { + struct diff_words_style *st = ecbdata.diff_words->style; + st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); + st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); + st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); + } } xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, - &xpp, &xecfg, &ecb); - if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) + &xpp, &xecfg); + if (o->word_diff) free_diff_words_data(&ecbdata); if (textconv_one) free(mf1.ptr); @@ -1811,34 +2251,37 @@ static void builtin_diffstat(const char *name_a, const char *name_b, data->is_unmerged = 1; return; } - if (complete_rewrite) { + + if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { + data->is_binary = 1; + data->added = diff_filespec_size(two); + data->deleted = diff_filespec_size(one); + } + + else if (complete_rewrite) { diff_populate_filespec(one, 0); diff_populate_filespec(two, 0); data->deleted = count_lines(one->data, one->size); data->added = count_lines(two->data, two->size); - goto free_and_return; } - if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) - die("unable to read files to diff"); - if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { - data->is_binary = 1; - data->added = mf2.size; - data->deleted = mf1.size; - } else { + else { /* Crazy xdl interfaces.. */ xpparam_t xpp; xdemitconf_t xecfg; - xdemitcb_t ecb; + + if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) + die("unable to read files to diff"); memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); - xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; + xpp.flags = o->xdl_opts; + xecfg.ctxlen = o->context; + xecfg.interhunkctxlen = o->interhunkcontext; xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, - &xpp, &xecfg, &ecb); + &xpp, &xecfg); } - free_and_return: diff_free_filespec_data(one); diff_free_filespec_data(two); } @@ -1860,6 +2303,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, data.lineno = 0; data.o = o; data.ws_rule = whitespace_rule(attr_path); + data.conflict_marker_size = ll_merge_marker_size(attr_path); if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) die("unable to read files to diff"); @@ -1876,14 +2320,13 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, /* Crazy xdl interfaces.. */ xpparam_t xpp; xdemitconf_t xecfg; - xdemitcb_t ecb; memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); xecfg.ctxlen = 1; /* at least one context line */ - xpp.flags = XDF_NEED_MINIMAL; + xpp.flags = 0; xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, - &xpp, &xecfg, &ecb); + &xpp, &xecfg); if (data.ws_rule & WS_BLANK_AT_EOF) { struct emit_callback ecbdata; @@ -1891,7 +2334,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, ecbdata.ws_rule = data.ws_rule; check_blank_at_eof(&mf1, &mf2, &ecbdata); - blank_at_eof = ecbdata.blank_at_eof_in_preimage; + blank_at_eof = ecbdata.blank_at_eof_in_postimage; if (blank_at_eof) { static char *err; @@ -2032,7 +2475,7 @@ static int diff_populate_gitlink(struct diff_filespec *s, int size_only) char *data = xmalloc(100), *dirty = ""; /* Are we looking at the work tree? */ - if (!s->sha1_valid && s->dirty_submodule) + if (s->dirty_submodule) dirty = "-dirty"; len = snprintf(data, 100, @@ -2124,10 +2567,14 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) } else { enum object_type type; - if (size_only) + if (size_only) { type = sha1_object_info(s->sha1, &s->size); - else { + if (type < 0) + die("unable to read %s", sha1_to_hex(s->sha1)); + } else { s->data = read_sha1_file(s->sha1, &type, &s->size); + if (!s->data) + die("unable to read %s", sha1_to_hex(s->sha1)); s->should_free = 1; } } @@ -2318,36 +2765,53 @@ static void fill_metainfo(struct strbuf *msg, struct diff_filespec *one, struct diff_filespec *two, struct diff_options *o, - struct diff_filepair *p) + struct diff_filepair *p, + int *must_show_header, + int use_color) { + const char *set = diff_get_color(use_color, DIFF_METAINFO); + const char *reset = diff_get_color(use_color, DIFF_RESET); + struct strbuf *msgbuf; + char *line_prefix = ""; + + *must_show_header = 1; + if (o->output_prefix) { + msgbuf = o->output_prefix(o, o->output_prefix_data); + line_prefix = msgbuf->buf; + } strbuf_init(msg, PATH_MAX * 2 + 300); switch (p->status) { case DIFF_STATUS_COPIED: - strbuf_addf(msg, "similarity index %d%%", similarity_index(p)); - strbuf_addstr(msg, "\ncopy from "); + strbuf_addf(msg, "%s%ssimilarity index %d%%", + line_prefix, set, similarity_index(p)); + strbuf_addf(msg, "%s\n%s%scopy from ", + reset, line_prefix, set); quote_c_style(name, msg, NULL, 0); - strbuf_addstr(msg, "\ncopy to "); + strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); quote_c_style(other, msg, NULL, 0); - strbuf_addch(msg, '\n'); + strbuf_addf(msg, "%s\n", reset); break; case DIFF_STATUS_RENAMED: - strbuf_addf(msg, "similarity index %d%%", similarity_index(p)); - strbuf_addstr(msg, "\nrename from "); + strbuf_addf(msg, "%s%ssimilarity index %d%%", + line_prefix, set, similarity_index(p)); + strbuf_addf(msg, "%s\n%s%srename from ", + reset, line_prefix, set); quote_c_style(name, msg, NULL, 0); - strbuf_addstr(msg, "\nrename to "); + strbuf_addf(msg, "%s\n%s%srename to ", + reset, line_prefix, set); quote_c_style(other, msg, NULL, 0); - strbuf_addch(msg, '\n'); + strbuf_addf(msg, "%s\n", reset); break; case DIFF_STATUS_MODIFIED: if (p->score) { - strbuf_addf(msg, "dissimilarity index %d%%\n", - similarity_index(p)); + strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", + line_prefix, + set, similarity_index(p), reset); break; } /* fallthru */ default: - /* nothing */ - ; + *must_show_header = 0; } if (one && two && hashcmp(one->sha1, two->sha1)) { int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; @@ -2358,15 +2822,13 @@ static void fill_metainfo(struct strbuf *msg, (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) abbrev = 40; } - strbuf_addf(msg, "index %.*s..%.*s", - abbrev, sha1_to_hex(one->sha1), - abbrev, sha1_to_hex(two->sha1)); + strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, + find_unique_abbrev(one->sha1, abbrev)); + strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); if (one->mode == two->mode) strbuf_addf(msg, " %06o", one->mode); - strbuf_addch(msg, '\n'); + strbuf_addf(msg, "%s\n", reset); } - if (msg->len) - strbuf_setlen(msg, msg->len - 1); } static void run_diff_cmd(const char *pgm, @@ -2381,11 +2843,7 @@ static void run_diff_cmd(const char *pgm, { const char *xfrm_msg = NULL; int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; - - if (msg) { - fill_metainfo(msg, name, other, one, two, o, p); - xfrm_msg = msg->len ? msg->buf : NULL; - } + int must_show_header = 0; if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) pgm = NULL; @@ -2395,6 +2853,17 @@ static void run_diff_cmd(const char *pgm, pgm = drv->external; } + if (msg) { + /* + * don't use colors when the header is intended for an + * external diff driver + */ + fill_metainfo(msg, name, other, one, two, o, p, + &must_show_header, + want_color(o->use_color) && !pgm); + xfrm_msg = msg->len ? msg->buf : NULL; + } + if (pgm) { run_external_diff(pgm, name, other, one, two, xfrm_msg, complete_rewrite); @@ -2402,7 +2871,8 @@ static void run_diff_cmd(const char *pgm, } if (one && two) builtin_diff(name, other ? other : name, - one, two, xfrm_msg, o, complete_rewrite); + one, two, xfrm_msg, must_show_header, + o, complete_rewrite); else fprintf(o->file, "* Unmerged path %s\n", name); } @@ -2429,10 +2899,16 @@ static void diff_fill_sha1_info(struct diff_filespec *one) static void strip_prefix(int prefix_length, const char **namep, const char **otherp) { /* Strip the prefix but do not molest /dev/null and absolute paths */ - if (*namep && **namep != '/') + if (*namep && **namep != '/') { *namep += prefix_length; - if (*otherp && **otherp != '/') + if (**namep == '/') + ++*namep; + } + if (*otherp && **otherp != '/') { *otherp += prefix_length; + if (**otherp == '/') + ++*otherp; + } } static void run_diff(struct diff_filepair *p, struct diff_options *o) @@ -2538,23 +3014,24 @@ static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) void diff_setup(struct diff_options *options) { - memset(options, 0, sizeof(*options)); + memcpy(options, &default_diff_options, sizeof(*options)); options->file = stdout; options->line_termination = '\n'; options->break_opt = -1; options->rename_limit = -1; - options->dirstat_percent = 3; + options->dirstat_permille = diff_dirstat_permille_default; options->context = 3; options->change = diff_change; options->add_remove = diff_addremove; - if (diff_use_color_default > 0) - DIFF_OPT_SET(options, COLOR_DIFF); + options->use_color = diff_use_color_default; options->detect_rename = diff_detect_rename_default; - if (!diff_mnemonic_prefix) { + if (diff_no_prefix) { + options->a_prefix = options->b_prefix = ""; + } else if (!diff_mnemonic_prefix) { options->a_prefix = "a/"; options->b_prefix = "b/"; } @@ -2628,6 +3105,12 @@ int diff_setup_done(struct diff_options *options) */ if (options->pickaxe) DIFF_OPT_SET(options, RECURSIVE); + /* + * When patches are generated, submodules diffed against the work tree + * must be checked for dirtiness too so it can be shown in the output + */ + if (options->output_format & DIFF_FORMAT_PATCH) + DIFF_OPT_SET(options, DIRTY_SUBMODULES); if (options->detect_rename && options->rename_limit < 0) options->rename_limit = diff_rename_limit_default; @@ -2706,12 +3189,132 @@ static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *va static int diff_scoreopt_parse(const char *opt); +static inline int short_opt(char opt, const char **argv, + const char **optarg) +{ + const char *arg = argv[0]; + if (arg[0] != '-' || arg[1] != opt) + return 0; + if (arg[2] != '\0') { + *optarg = arg + 2; + return 1; + } + if (!argv[1]) + die("Option '%c' requires a value", opt); + *optarg = argv[1]; + return 2; +} + +int parse_long_opt(const char *opt, const char **argv, + const char **optarg) +{ + const char *arg = argv[0]; + if (arg[0] != '-' || arg[1] != '-') + return 0; + arg += strlen("--"); + if (prefixcmp(arg, opt)) + return 0; + arg += strlen(opt); + if (*arg == '=') { /* sticked form: --option=value */ + *optarg = arg + 1; + return 1; + } + if (*arg != '\0') + return 0; + /* separate form: --option value */ + if (!argv[1]) + die("Option '--%s' requires a value", opt); + *optarg = argv[1]; + return 2; +} + +static int stat_opt(struct diff_options *options, const char **av) +{ + const char *arg = av[0]; + char *end; + int width = options->stat_width; + int name_width = options->stat_name_width; + int count = options->stat_count; + int argcount = 1; + + arg += strlen("--stat"); + end = (char *)arg; + + switch (*arg) { + case '-': + if (!prefixcmp(arg, "-width")) { + arg += strlen("-width"); + if (*arg == '=') + width = strtoul(arg + 1, &end, 10); + else if (!*arg && !av[1]) + die("Option '--stat-width' requires a value"); + else if (!*arg) { + width = strtoul(av[1], &end, 10); + argcount = 2; + } + } else if (!prefixcmp(arg, "-name-width")) { + arg += strlen("-name-width"); + if (*arg == '=') + name_width = strtoul(arg + 1, &end, 10); + else if (!*arg && !av[1]) + die("Option '--stat-name-width' requires a value"); + else if (!*arg) { + name_width = strtoul(av[1], &end, 10); + argcount = 2; + } + } else if (!prefixcmp(arg, "-count")) { + arg += strlen("-count"); + if (*arg == '=') + count = strtoul(arg + 1, &end, 10); + else if (!*arg && !av[1]) + die("Option '--stat-count' requires a value"); + else if (!*arg) { + count = strtoul(av[1], &end, 10); + argcount = 2; + } + } + break; + case '=': + width = strtoul(arg+1, &end, 10); + if (*end == ',') + name_width = strtoul(end+1, &end, 10); + if (*end == ',') + count = strtoul(end+1, &end, 10); + } + + /* Important! This checks all the error cases! */ + if (*end) + return 0; + options->output_format |= DIFF_FORMAT_DIFFSTAT; + options->stat_name_width = name_width; + options->stat_width = width; + options->stat_count = count; + return argcount; +} + +static int parse_dirstat_opt(struct diff_options *options, const char *params) +{ + struct strbuf errmsg = STRBUF_INIT; + if (parse_dirstat_params(options, params, &errmsg)) + die(_("Failed to parse --dirstat/-X option parameter:\n%s"), + errmsg.buf); + strbuf_release(&errmsg); + /* + * The caller knows a dirstat-related option is given from the command + * line; allow it to say "return this_function();" + */ + options->output_format |= DIFF_FORMAT_DIRSTAT; + return 1; +} + int diff_opt_parse(struct diff_options *options, const char **av, int ac) { const char *arg = av[0]; + const char *optarg; + int argcount; /* Output format options */ - if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) + if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")) options->output_format |= DIFF_FORMAT_PATCH; else if (opt_arg(arg, 'U', "unified", &options->context)) options->output_format |= DIFF_FORMAT_PATCH; @@ -2723,15 +3326,19 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) options->output_format |= DIFF_FORMAT_NUMSTAT; else if (!strcmp(arg, "--shortstat")) options->output_format |= DIFF_FORMAT_SHORTSTAT; - else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent)) - options->output_format |= DIFF_FORMAT_DIRSTAT; - else if (!strcmp(arg, "--cumulative")) { - options->output_format |= DIFF_FORMAT_DIRSTAT; - DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); - } else if (opt_arg(arg, 0, "dirstat-by-file", - &options->dirstat_percent)) { - options->output_format |= DIFF_FORMAT_DIRSTAT; - DIFF_OPT_SET(options, DIRSTAT_BY_FILE); + else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) + return parse_dirstat_opt(options, ""); + else if (!prefixcmp(arg, "-X")) + return parse_dirstat_opt(options, arg + 2); + else if (!prefixcmp(arg, "--dirstat=")) + return parse_dirstat_opt(options, arg + 10); + else if (!strcmp(arg, "--cumulative")) + return parse_dirstat_opt(options, "cumulative"); + else if (!strcmp(arg, "--dirstat-by-file")) + return parse_dirstat_opt(options, "files"); + else if (!prefixcmp(arg, "--dirstat-by-file=")) { + parse_dirstat_opt(options, "files"); + return parse_dirstat_opt(options, arg + 18); } else if (!strcmp(arg, "--check")) options->output_format |= DIFF_FORMAT_CHECKDIFF; @@ -2745,49 +3352,31 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) options->output_format |= DIFF_FORMAT_NAME_STATUS; else if (!strcmp(arg, "-s")) options->output_format |= DIFF_FORMAT_NO_OUTPUT; - else if (!prefixcmp(arg, "--stat")) { - char *end; - int width = options->stat_width; - int name_width = options->stat_name_width; - arg += 6; - end = (char *)arg; - - switch (*arg) { - case '-': - if (!prefixcmp(arg, "-width=")) - width = strtoul(arg + 7, &end, 10); - else if (!prefixcmp(arg, "-name-width=")) - name_width = strtoul(arg + 12, &end, 10); - break; - case '=': - width = strtoul(arg+1, &end, 10); - if (*end == ',') - name_width = strtoul(end+1, &end, 10); - } - - /* Important! This checks all the error cases! */ - if (*end) - return 0; - options->output_format |= DIFF_FORMAT_DIFFSTAT; - options->stat_name_width = name_width; - options->stat_width = width; - } + else if (!prefixcmp(arg, "--stat")) + /* --stat, --stat-width, --stat-name-width, or --stat-count */ + return stat_opt(options, av); /* renames options */ - else if (!prefixcmp(arg, "-B")) { + else if (!prefixcmp(arg, "-B") || !prefixcmp(arg, "--break-rewrites=") || + !strcmp(arg, "--break-rewrites")) { if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) - return -1; + return error("invalid argument to -B: %s", arg+2); } - else if (!prefixcmp(arg, "-M")) { + else if (!prefixcmp(arg, "-M") || !prefixcmp(arg, "--find-renames=") || + !strcmp(arg, "--find-renames")) { if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) - return -1; + return error("invalid argument to -M: %s", arg+2); options->detect_rename = DIFF_DETECT_RENAME; } - else if (!prefixcmp(arg, "-C")) { + else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { + options->irreversible_delete = 1; + } + else if (!prefixcmp(arg, "-C") || !prefixcmp(arg, "--find-copies=") || + !strcmp(arg, "--find-copies")) { if (options->detect_rename == DIFF_DETECT_COPY) DIFF_OPT_SET(options, FIND_COPIES_HARDER); if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) - return -1; + return error("invalid argument to -C: %s", arg+2); options->detect_rename = DIFF_DETECT_COPY; } else if (!strcmp(arg, "--no-renames")) @@ -2800,6 +3389,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) } /* xdiff options */ + else if (!strcmp(arg, "--minimal")) + DIFF_XDL_SET(options, NEED_MINIMAL); + else if (!strcmp(arg, "--no-minimal")) + DIFF_XDL_CLR(options, NEED_MINIMAL); else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) DIFF_XDL_SET(options, IGNORE_WHITESPACE); else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) @@ -2808,6 +3401,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); else if (!strcmp(arg, "--patience")) DIFF_XDL_SET(options, PATIENCE_DIFF); + else if (!strcmp(arg, "--histogram")) + DIFF_XDL_SET(options, HISTOGRAM_DIFF); /* flags options */ else if (!strcmp(arg, "--binary")) { @@ -2825,18 +3420,49 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) else if (!strcmp(arg, "--follow")) DIFF_OPT_SET(options, FOLLOW_RENAMES); else if (!strcmp(arg, "--color")) - DIFF_OPT_SET(options, COLOR_DIFF); + options->use_color = 1; + else if (!prefixcmp(arg, "--color=")) { + int value = git_config_colorbool(NULL, arg+8); + if (value < 0) + return error("option `color' expects \"always\", \"auto\", or \"never\""); + options->use_color = value; + } else if (!strcmp(arg, "--no-color")) - DIFF_OPT_CLR(options, COLOR_DIFF); + options->use_color = 0; else if (!strcmp(arg, "--color-words")) { - DIFF_OPT_SET(options, COLOR_DIFF); - DIFF_OPT_SET(options, COLOR_DIFF_WORDS); + options->use_color = 1; + options->word_diff = DIFF_WORDS_COLOR; } else if (!prefixcmp(arg, "--color-words=")) { - DIFF_OPT_SET(options, COLOR_DIFF); - DIFF_OPT_SET(options, COLOR_DIFF_WORDS); + options->use_color = 1; + options->word_diff = DIFF_WORDS_COLOR; options->word_regex = arg + 14; } + else if (!strcmp(arg, "--word-diff")) { + if (options->word_diff == DIFF_WORDS_NONE) + options->word_diff = DIFF_WORDS_PLAIN; + } + else if (!prefixcmp(arg, "--word-diff=")) { + const char *type = arg + 12; + if (!strcmp(type, "plain")) + options->word_diff = DIFF_WORDS_PLAIN; + else if (!strcmp(type, "color")) { + options->use_color = 1; + options->word_diff = DIFF_WORDS_COLOR; + } + else if (!strcmp(type, "porcelain")) + options->word_diff = DIFF_WORDS_PORCELAIN; + else if (!strcmp(type, "none")) + options->word_diff = DIFF_WORDS_NONE; + else + die("bad --word-diff argument: %s", type); + } + else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { + if (options->word_diff == DIFF_WORDS_NONE) + options->word_diff = DIFF_WORDS_PLAIN; + options->word_regex = optarg; + return argcount; + } else if (!strcmp(arg, "--exit-code")) DIFF_OPT_SET(options, EXIT_WITH_STATUS); else if (!strcmp(arg, "--quiet")) @@ -2849,9 +3475,13 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) DIFF_OPT_SET(options, ALLOW_TEXTCONV); else if (!strcmp(arg, "--no-textconv")) DIFF_OPT_CLR(options, ALLOW_TEXTCONV); - else if (!strcmp(arg, "--ignore-submodules")) - DIFF_OPT_SET(options, IGNORE_SUBMODULES); - else if (!strcmp(arg, "--submodule")) + else if (!strcmp(arg, "--ignore-submodules")) { + DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); + handle_ignore_submodules_arg(options, "all"); + } else if (!prefixcmp(arg, "--ignore-submodules=")) { + DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); + handle_ignore_submodules_arg(options, arg + 20); + } else if (!strcmp(arg, "--submodule")) DIFF_OPT_SET(options, SUBMODULE_LOG); else if (!prefixcmp(arg, "--submodule=")) { if (!strcmp(arg + 12, "log")) @@ -2861,18 +3491,31 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) /* misc options */ else if (!strcmp(arg, "-z")) options->line_termination = 0; - else if (!prefixcmp(arg, "-l")) - options->rename_limit = strtoul(arg+2, NULL, 10); - else if (!prefixcmp(arg, "-S")) - options->pickaxe = arg + 2; + else if ((argcount = short_opt('l', av, &optarg))) { + options->rename_limit = strtoul(optarg, NULL, 10); + return argcount; + } + else if ((argcount = short_opt('S', av, &optarg))) { + options->pickaxe = optarg; + options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; + return argcount; + } else if ((argcount = short_opt('G', av, &optarg))) { + options->pickaxe = optarg; + options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; + return argcount; + } else if (!strcmp(arg, "--pickaxe-all")) - options->pickaxe_opts = DIFF_PICKAXE_ALL; + options->pickaxe_opts |= DIFF_PICKAXE_ALL; else if (!strcmp(arg, "--pickaxe-regex")) - options->pickaxe_opts = DIFF_PICKAXE_REGEX; - else if (!prefixcmp(arg, "-O")) - options->orderfile = arg + 2; - else if (!prefixcmp(arg, "--diff-filter=")) - options->filter = arg + 14; + options->pickaxe_opts |= DIFF_PICKAXE_REGEX; + else if ((argcount = short_opt('O', av, &optarg))) { + options->orderfile = optarg; + return argcount; + } + else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { + options->filter = optarg; + return argcount; + } else if (!strcmp(arg, "--abbrev")) options->abbrev = DEFAULT_ABBREV; else if (!prefixcmp(arg, "--abbrev=")) { @@ -2882,26 +3525,37 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) else if (40 < options->abbrev) options->abbrev = 40; } - else if (!prefixcmp(arg, "--src-prefix=")) - options->a_prefix = arg + 13; - else if (!prefixcmp(arg, "--dst-prefix=")) - options->b_prefix = arg + 13; + else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { + options->a_prefix = optarg; + return argcount; + } + else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { + options->b_prefix = optarg; + return argcount; + } else if (!strcmp(arg, "--no-prefix")) options->a_prefix = options->b_prefix = ""; else if (opt_arg(arg, '\0', "inter-hunk-context", &options->interhunkcontext)) ; - else if (!prefixcmp(arg, "--output=")) { - options->file = fopen(arg + strlen("--output="), "w"); + else if (!strcmp(arg, "-W")) + DIFF_OPT_SET(options, FUNCCONTEXT); + else if (!strcmp(arg, "--function-context")) + DIFF_OPT_SET(options, FUNCCONTEXT); + else if (!strcmp(arg, "--no-function-context")) + DIFF_OPT_CLR(options, FUNCCONTEXT); + else if ((argcount = parse_long_opt("output", av, &optarg))) { + options->file = fopen(optarg, "w"); if (!options->file) - die_errno("Could not open '%s'", arg + strlen("--output=")); + die_errno("Could not open '%s'", optarg); options->close_file = 1; + return argcount; } else return 0; return 1; } -static int parse_num(const char **cp_p) +int parse_rename_score(const char **cp_p) { unsigned long num, scale; int ch, dot; @@ -2944,10 +3598,26 @@ static int diff_scoreopt_parse(const char *opt) if (*opt++ != '-') return -1; cmd = *opt++; + if (cmd == '-') { + /* convert the long-form arguments into short-form versions */ + if (!prefixcmp(opt, "break-rewrites")) { + opt += strlen("break-rewrites"); + if (*opt == 0 || *opt++ == '=') + cmd = 'B'; + } else if (!prefixcmp(opt, "find-copies")) { + opt += strlen("find-copies"); + if (*opt == 0 || *opt++ == '=') + cmd = 'C'; + } else if (!prefixcmp(opt, "find-renames")) { + opt += strlen("find-renames"); + if (*opt == 0 || *opt++ == '=') + cmd = 'M'; + } + } if (cmd != 'M' && cmd != 'C' && cmd != 'B') return -1; /* that is not a -M, -C nor -B option */ - opt1 = parse_num(&opt); + opt1 = parse_rename_score(&opt); if (cmd != 'B') opt2 = 0; else { @@ -2957,7 +3627,7 @@ static int diff_scoreopt_parse(const char *opt) return -1; /* we expect -B80/99 or -B80 */ else { opt++; - opt2 = parse_num(&opt); + opt2 = parse_rename_score(&opt); } } if (*opt != 0) @@ -3023,6 +3693,11 @@ static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) { int line_termination = opt->line_termination; int inter_name_termination = line_termination ? '\t' : '\0'; + if (opt->output_prefix) { + struct strbuf *msg = NULL; + msg = opt->output_prefix(opt, opt->output_prefix_data); + fprintf(opt->file, "%s", msg->buf); + } if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, @@ -3077,7 +3752,8 @@ int diff_unmodified_pair(struct diff_filepair *p) * dealing with a change. */ if (one->sha1_valid && two->sha1_valid && - !hashcmp(one->sha1, two->sha1)) + !hashcmp(one->sha1, two->sha1) && + !one->dirty_submodule && !two->dirty_submodule) return 1; /* no change */ if (!one->sha1_valid && !two->sha1_valid) return 1; /* both look at the same file on the filesystem. */ @@ -3104,7 +3780,7 @@ static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) - return; /* no tree diffs in patch format */ + return; /* no useful stat for tree diffs */ run_diffstat(p, o, diffstat); } @@ -3117,7 +3793,7 @@ static void diff_flush_checkdiff(struct diff_filepair *p, if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) - return; /* no tree diffs in patch format */ + return; /* nothing to check in tree diffs */ run_checkdiff(p, o); } @@ -3212,6 +3888,8 @@ static void diff_resolve_rename_copy(void) } else if (hashcmp(p->one->sha1, p->two->sha1) || p->one->mode != p->two->mode || + p->one->dirty_submodule || + p->two->dirty_submodule || is_null_sha1(p->one->sha1)) p->status = DIFF_STATUS_MODIFIED; else { @@ -3265,48 +3943,62 @@ static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_f } -static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name) +static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, + const char *line_prefix) { if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { - fprintf(file, " mode change %06o => %06o%c", p->one->mode, p->two->mode, - show_name ? ' ' : '\n'); + fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, + p->two->mode, show_name ? ' ' : '\n'); if (show_name) { write_name_quoted(p->two->path, file, '\n'); } } } -static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p) +static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, + const char *line_prefix) { char *names = pprint_rename(p->one->path, p->two->path); fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); free(names); - show_mode_change(file, p, 0); + show_mode_change(file, p, 0, line_prefix); } -static void diff_summary(FILE *file, struct diff_filepair *p) +static void diff_summary(struct diff_options *opt, struct diff_filepair *p) { + FILE *file = opt->file; + char *line_prefix = ""; + + if (opt->output_prefix) { + struct strbuf *buf = opt->output_prefix(opt, opt->output_prefix_data); + line_prefix = buf->buf; + } + switch(p->status) { case DIFF_STATUS_DELETED: + fputs(line_prefix, file); show_file_mode_name(file, "delete", p->one); break; case DIFF_STATUS_ADDED: + fputs(line_prefix, file); show_file_mode_name(file, "create", p->two); break; case DIFF_STATUS_COPIED: - show_rename_copy(file, "copy", p); + fputs(line_prefix, file); + show_rename_copy(file, "copy", p, line_prefix); break; case DIFF_STATUS_RENAMED: - show_rename_copy(file, "rename", p); + fputs(line_prefix, file); + show_rename_copy(file, "rename", p, line_prefix); break; default: if (p->score) { - fputs(" rewrite ", file); + fprintf(file, "%s rewrite ", line_prefix); write_name_quoted(p->two->path, file, ' '); fprintf(file, "(%d%%)\n", similarity_index(p)); } - show_mode_change(file, p, !p->score); + show_mode_change(file, p, !p->score, line_prefix); break; } } @@ -3360,7 +4052,6 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) for (i = 0; i < q->nr; i++) { xpparam_t xpp; xdemitconf_t xecfg; - xdemitcb_t ecb; mmfile_t mf1, mf2; struct diff_filepair *p = q->queue[i]; int len1, len2; @@ -3418,11 +4109,18 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) len2, p->two->path); git_SHA1_Update(&ctx, buffer, len1); - xpp.flags = XDF_NEED_MINIMAL; + if (diff_filespec_is_binary(p->one) || + diff_filespec_is_binary(p->two)) { + git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); + git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); + continue; + } + + xpp.flags = 0; xecfg.ctxlen = 3; - xecfg.flags = XDL_EMIT_FUNCNAMES; + xecfg.flags = 0; xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, - &xpp, &xecfg, &ecb); + &xpp, &xecfg); } git_SHA1_Final(sha1, &ctx); @@ -3439,8 +4137,7 @@ int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) diff_free_filepair(q->queue[i]); free(q->queue); - q->queue = NULL; - q->nr = q->alloc = 0; + DIFF_QUEUE_CLEAR(q); return result; } @@ -3470,11 +4167,34 @@ static int is_summary_empty(const struct diff_queue_struct *q) return 1; } +static const char rename_limit_warning[] = +"inexact rename detection was skipped due to too many files."; + +static const char degrade_cc_to_c_warning[] = +"only found copies from modified paths due to too many files."; + +static const char rename_limit_advice[] = +"you may want to set your %s variable to at least " +"%d and retry the command."; + +void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) +{ + if (degraded_cc) + warning(degrade_cc_to_c_warning); + else if (needed) + warning(rename_limit_warning); + else + return; + if (0 < needed && needed < 32767) + warning(rename_limit_advice, varname, needed); +} + void diff_flush(struct diff_options *options) { struct diff_queue_struct *q = &diff_queued_diff; int i, output_format = options->output_format; int separator = 0; + int dirstat_by_line = 0; /* * Order: raw, stat, summary, patch @@ -3495,7 +4215,11 @@ void diff_flush(struct diff_options *options) separator++; } - if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) { + if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) + dirstat_by_line = 1; + + if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || + dirstat_by_line) { struct diffstat_t diffstat; memset(&diffstat, 0, sizeof(struct diffstat_t)); @@ -3510,18 +4234,44 @@ void diff_flush(struct diff_options *options) show_stats(&diffstat, options); if (output_format & DIFF_FORMAT_SHORTSTAT) show_shortstats(&diffstat, options); + if (output_format & DIFF_FORMAT_DIRSTAT) + show_dirstat_by_line(&diffstat, options); free_diffstat_info(&diffstat); separator++; } - if (output_format & DIFF_FORMAT_DIRSTAT) + if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) show_dirstat(options); if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { - for (i = 0; i < q->nr; i++) - diff_summary(options->file, q->queue[i]); + for (i = 0; i < q->nr; i++) { + diff_summary(options, q->queue[i]); + } separator++; } + if (output_format & DIFF_FORMAT_NO_OUTPUT && + DIFF_OPT_TST(options, EXIT_WITH_STATUS) && + DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { + /* + * run diff_flush_patch for the exit status. setting + * options->file to /dev/null should be safe, becaue we + * aren't supposed to produce any output anyway. + */ + if (options->close_file) + fclose(options->file); + options->file = fopen("/dev/null", "w"); + if (!options->file) + die_errno("Could not open /dev/null"); + options->close_file = 1; + for (i = 0; i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + if (check_pair_status(p)) + diff_flush_patch(p, options); + if (options->found_changes) + break; + } + } + if (output_format & DIFF_FORMAT_PATCH) { if (separator) { putc(options->line_termination, options->file); @@ -3545,8 +4295,7 @@ void diff_flush(struct diff_options *options) diff_free_filepair(q->queue[i]); free_queue: free(q->queue); - q->queue = NULL; - q->nr = q->alloc = 0; + DIFF_QUEUE_CLEAR(q); if (options->close_file) fclose(options->file); @@ -3568,8 +4317,7 @@ static void diffcore_apply_filter(const char *filter) int i; struct diff_queue_struct *q = &diff_queued_diff; struct diff_queue_struct outq; - outq.queue = NULL; - outq.nr = outq.alloc = 0; + DIFF_QUEUE_CLEAR(&outq); if (!filter) return; @@ -3637,8 +4385,7 @@ static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) int i; struct diff_queue_struct *q = &diff_queued_diff; struct diff_queue_struct outq; - outq.queue = NULL; - outq.nr = outq.alloc = 0; + DIFF_QUEUE_CLEAR(&outq); for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; @@ -3701,28 +4448,39 @@ void diffcore_std(struct diff_options *options) { if (options->skip_stat_unmatch) diffcore_skip_stat_unmatch(options); - if (options->break_opt != -1) - diffcore_break(options->break_opt); - if (options->detect_rename) - diffcore_rename(options); - if (options->break_opt != -1) - diffcore_merge_broken(); + if (!options->found_follow) { + /* See try_to_follow_renames() in tree-diff.c */ + if (options->break_opt != -1) + diffcore_break(options->break_opt); + if (options->detect_rename) + diffcore_rename(options); + if (options->break_opt != -1) + diffcore_merge_broken(); + } if (options->pickaxe) - diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); + diffcore_pickaxe(options); if (options->orderfile) diffcore_order(options->orderfile); - diff_resolve_rename_copy(); + if (!options->found_follow) + /* See try_to_follow_renames() in tree-diff.c */ + diff_resolve_rename_copy(); diffcore_apply_filter(options->filter); if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) DIFF_OPT_SET(options, HAS_CHANGES); else DIFF_OPT_CLR(options, HAS_CHANGES); + + options->found_follow = 0; } int diff_result_code(struct diff_options *opt, int status) { int result = 0; + + diff_warn_rename_limit("diff.renamelimit", + opt->needed_rename_limit, + opt->degraded_cc_to_c); if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) return status; @@ -3735,6 +4493,31 @@ int diff_result_code(struct diff_options *opt, int status) return result; } +int diff_can_quit_early(struct diff_options *opt) +{ + return (DIFF_OPT_TST(opt, QUICK) && + !opt->filter && + DIFF_OPT_TST(opt, HAS_CHANGES)); +} + +/* + * Shall changes to this submodule be ignored? + * + * Submodule changes can be configured to be ignored separately for each path, + * but that configuration can be overridden from the command line. + */ +static int is_submodule_ignored(const char *path, struct diff_options *options) +{ + int ignored = 0; + unsigned orig_flags = options->flags; + if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) + set_diffopt_flags_from_submodule_config(options, path); + if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) + ignored = 1; + options->flags = orig_flags; + return ignored; +} + void diff_addremove(struct diff_options *options, int addremove, unsigned mode, const unsigned char *sha1, @@ -3742,7 +4525,7 @@ void diff_addremove(struct diff_options *options, { struct diff_filespec *one, *two; - if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode)) + if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) return; /* This may look odd, but it is a preparation for @@ -3789,8 +4572,8 @@ void diff_change(struct diff_options *options, { struct diff_filespec *one, *two; - if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode) - && S_ISGITLINK(new_mode)) + if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && + is_submodule_ignored(concatpath, options)) return; if (DIFF_OPT_TST(options, REVERSE_DIFF)) { @@ -3818,20 +4601,20 @@ void diff_change(struct diff_options *options, DIFF_OPT_SET(options, HAS_CHANGES); } -void diff_unmerge(struct diff_options *options, - const char *path, - unsigned mode, const unsigned char *sha1) +struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) { + struct diff_filepair *pair; struct diff_filespec *one, *two; if (options->prefix && strncmp(path, options->prefix, options->prefix_length)) - return; + return NULL; one = alloc_filespec(path); two = alloc_filespec(path); - fill_filespec(one, sha1, mode); - diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1; + pair = diff_queue(&diff_queued_diff, one, two); + pair->is_unmerged = 1; + return pair; } static char *run_textconv(const char *pgm, struct diff_filespec *spec, @@ -3842,6 +4625,7 @@ static char *run_textconv(const char *pgm, struct diff_filespec *spec, const char **arg = argv; struct child_process child; struct strbuf buf = STRBUF_INIT; + int err = 0; temp = prepare_temp_file(spec->path, spec); *arg++ = pgm; @@ -3852,17 +4636,65 @@ static char *run_textconv(const char *pgm, struct diff_filespec *spec, child.use_shell = 1; child.argv = argv; child.out = -1; - if (start_command(&child) != 0 || - strbuf_read(&buf, child.out, 0) < 0 || - finish_command(&child) != 0) { - close(child.out); - strbuf_release(&buf); + if (start_command(&child)) { remove_tempfile(); - error("error running textconv command '%s'", pgm); return NULL; } + + if (strbuf_read(&buf, child.out, 0) < 0) + err = error("error reading from textconv command '%s'", pgm); close(child.out); + + if (finish_command(&child) || err) { + strbuf_release(&buf); + remove_tempfile(); + return NULL; + } remove_tempfile(); return strbuf_detach(&buf, outsize); } + +size_t fill_textconv(struct userdiff_driver *driver, + struct diff_filespec *df, + char **outbuf) +{ + size_t size; + + if (!driver || !driver->textconv) { + if (!DIFF_FILE_VALID(df)) { + *outbuf = ""; + return 0; + } + if (diff_populate_filespec(df, 0)) + die("unable to read files to diff"); + *outbuf = df->data; + return df->size; + } + + if (driver->textconv_cache && df->sha1_valid) { + *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, + &size); + if (*outbuf) + return size; + } + + *outbuf = run_textconv(driver->textconv, df, &size); + if (!*outbuf) + die("unable to read files to diff"); + + if (driver->textconv_cache && df->sha1_valid) { + /* ignore errors, as we might be in a readonly repository */ + notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, + size); + /* + * we could save up changes and flush them all at the end, + * but we would need an extra call after all diffing is done. + * Since generating a cache entry is the slow path anyway, + * this extra overhead probably isn't a big deal. + */ + notes_cache_write(driver->textconv_cache); + } + + return size; +}