Code

the use of 'tr' in the test suite isn't really portable
[git.git] / diff.c
diff --git a/diff.c b/diff.c
index 6b54959610db604bfabc15e6edd2b212f16d0c62..08ec66c7945fb330d289f9e579a162e9217a16eb 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -146,7 +146,7 @@ int git_diff_ui_config(const char *var, const char *value)
                return 0;
        }
        if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
-               diff_use_color_default = git_config_colorbool(var, value);
+               diff_use_color_default = git_config_colorbool(var, value, -1);
                return 0;
        }
        if (!strcmp(var, "diff.renames")) {
@@ -439,7 +439,7 @@ static void diff_words_show(struct diff_words_data *diff_words)
        ecb.outf = xdiff_outf;
        ecb.priv = diff_words;
        diff_words->xm.consume = fn_out_diff_words_aux;
-       xdl_diff(&minus, &plus, &xpp, &xecfg, &ecb);
+       xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);
 
        free(minus.ptr);
        free(plus.ptr);
@@ -454,6 +454,7 @@ static void diff_words_show(struct diff_words_data *diff_words)
 struct emit_callback {
        struct xdiff_emit_state xm;
        int nparents, color_diff;
+       unsigned ws_rule;
        const char **label_path;
        struct diff_words_data *diff_words;
        int *found_changesp;
@@ -485,75 +486,9 @@ const char *diff_get_color(int diff_use_color, enum color_diff ix)
 
 static void emit_line(const char *set, const char *reset, const char *line, int len)
 {
-       if (len > 0 && line[len-1] == '\n')
-               len--;
        fputs(set, stdout);
        fwrite(line, len, 1, stdout);
-       puts(reset);
-}
-
-static void emit_line_with_ws(int nparents,
-               const char *set, const char *reset, const char *ws,
-               const char *line, int len)
-{
-       int col0 = nparents;
-       int last_tab_in_indent = -1;
-       int last_space_in_indent = -1;
-       int i;
-       int tail = len;
-       int need_highlight_leading_space = 0;
-       /* The line is a newly added line.  Does it have funny leading
-        * whitespaces?  In indent, SP should never precede a TAB.
-        */
-       for (i = col0; i < len; i++) {
-               if (line[i] == '\t') {
-                       last_tab_in_indent = i;
-                       if (0 <= last_space_in_indent)
-                               need_highlight_leading_space = 1;
-               }
-               else if (line[i] == ' ')
-                       last_space_in_indent = i;
-               else
-                       break;
-       }
-       fputs(set, stdout);
-       fwrite(line, col0, 1, stdout);
        fputs(reset, stdout);
-       if (((i == len) || line[i] == '\n') && i != col0) {
-               /* The whole line was indent */
-               emit_line(ws, reset, line + col0, len - col0);
-               return;
-       }
-       i = col0;
-       if (need_highlight_leading_space) {
-               while (i < last_tab_in_indent) {
-                       if (line[i] == ' ') {
-                               fputs(ws, stdout);
-                               putchar(' ');
-                               fputs(reset, stdout);
-                       }
-                       else
-                               putchar(line[i]);
-                       i++;
-               }
-       }
-       tail = len - 1;
-       if (line[tail] == '\n' && i < tail)
-               tail--;
-       while (i < tail) {
-               if (!isspace(line[tail]))
-                       break;
-               tail--;
-       }
-       if ((i < tail && line[tail + 1] != '\n')) {
-               /* This has whitespace between tail+1..len */
-               fputs(set, stdout);
-               fwrite(line + i, tail - i + 1, 1, stdout);
-               fputs(reset, stdout);
-               emit_line(ws, reset, line + tail + 1, len - tail - 1);
-       }
-       else
-               emit_line(set, reset, line + i, len - i);
 }
 
 static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len)
@@ -563,9 +498,13 @@ static void emit_add_line(const char *reset, struct emit_callback *ecbdata, cons
 
        if (!*ws)
                emit_line(set, reset, line, len);
-       else
-               emit_line_with_ws(ecbdata->nparents, set, reset, ws,
-                               line, len);
+       else {
+               /* Emit just the prefix, then the rest. */
+               emit_line(set, reset, line, ecbdata->nparents);
+               (void)check_and_emit_line(line + ecbdata->nparents,
+                   len - ecbdata->nparents, ecbdata->ws_rule,
+                   stdout, set, reset, ws);
+       }
 }
 
 static void fn_out_consume(void *priv, char *line, unsigned long len)
@@ -720,7 +659,9 @@ struct diffstat_t {
        int nr;
        int alloc;
        struct diffstat_file {
+               char *from_name;
                char *name;
+               char *print_name;
                unsigned is_unmerged:1;
                unsigned is_binary:1;
                unsigned is_renamed:1;
@@ -741,11 +682,14 @@ static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
        }
        diffstat->files[diffstat->nr++] = x;
        if (name_b) {
-               x->name = pprint_rename(name_a, name_b);
+               x->from_name = xstrdup(name_a);
+               x->name = xstrdup(name_b);
                x->is_renamed = 1;
        }
-       else
+       else {
+               x->from_name = NULL;
                x->name = xstrdup(name_a);
+       }
        return x;
 }
 
@@ -789,6 +733,28 @@ static void show_graph(char ch, int cnt, const char *set, const char *reset)
        printf("%s", reset);
 }
 
+static void fill_print_name(struct diffstat_file *file)
+{
+       char *pname;
+
+       if (file->print_name)
+               return;
+
+       if (!file->is_renamed) {
+               struct strbuf buf;
+               strbuf_init(&buf, 0);
+               if (quote_c_style(file->name, &buf, NULL, 0)) {
+                       pname = strbuf_detach(&buf, NULL);
+               } else {
+                       pname = file->name;
+                       strbuf_release(&buf);
+               }
+       } else {
+               pname = pprint_rename(file->from_name, file->name);
+       }
+       file->print_name = pname;
+}
+
 static void show_stats(struct diffstat_t* data, struct diff_options *options)
 {
        int i, len, add, del, total, adds = 0, dels = 0;
@@ -822,19 +788,8 @@ static void show_stats(struct diffstat_t* data, struct diff_options *options)
        for (i = 0; i < data->nr; i++) {
                struct diffstat_file *file = data->files[i];
                int change = file->added + file->deleted;
-
-               if (!file->is_renamed) {  /* renames are already quoted by pprint_rename */
-                       struct strbuf buf;
-                       strbuf_init(&buf, 0);
-                       if (quote_c_style(file->name, &buf, NULL, 0)) {
-                               free(file->name);
-                               file->name = strbuf_detach(&buf, NULL);
-                       } else {
-                               strbuf_release(&buf);
-                       }
-               }
-
-               len = strlen(file->name);
+               fill_print_name(file);
+               len = strlen(file->print_name);
                if (max_len < len)
                        max_len = len;
 
@@ -859,7 +814,7 @@ static void show_stats(struct diffstat_t* data, struct diff_options *options)
 
        for (i = 0; i < data->nr; i++) {
                const char *prefix = "";
-               char *name = data->files[i]->name;
+               char *name = data->files[i]->print_name;
                int added = data->files[i]->added;
                int deleted = data->files[i]->deleted;
                int name_len;
@@ -887,17 +842,17 @@ static void show_stats(struct diffstat_t* data, struct diff_options *options)
                        printf("%s%d%s", add_c, added, reset);
                        printf(" bytes");
                        printf("\n");
-                       goto free_diffstat_file;
+                       continue;
                }
                else if (data->files[i]->is_unmerged) {
                        show_name(prefix, name, len, reset, set);
                        printf("  Unmerged\n");
-                       goto free_diffstat_file;
+                       continue;
                }
                else if (!data->files[i]->is_renamed &&
                         (added + deleted == 0)) {
                        total_files--;
-                       goto free_diffstat_file;
+                       continue;
                }
 
                /*
@@ -919,11 +874,7 @@ static void show_stats(struct diffstat_t* data, struct diff_options *options)
                show_graph('+', add, add_c, reset);
                show_graph('-', del, del_c, reset);
                putchar('\n');
-       free_diffstat_file:
-               free(data->files[i]->name);
-               free(data->files[i]);
        }
-       free(data->files);
        printf("%s %d files changed, %d insertions(+), %d deletions(-)%s\n",
               set, total_files, adds, dels, reset);
 }
@@ -948,11 +899,7 @@ static void show_shortstats(struct diffstat_t* data)
                                dels += deleted;
                        }
                }
-               free(data->files[i]->name);
-               free(data->files[i]);
        }
-       free(data->files);
-
        printf(" %d files changed, %d insertions(+), %d deletions(-)\n",
               total_files, adds, dels);
 }
@@ -961,6 +908,9 @@ static void show_numstat(struct diffstat_t* data, struct diff_options *options)
 {
        int i;
 
+       if (data->nr == 0)
+               return;
+
        for (i = 0; i < data->nr; i++) {
                struct diffstat_file *file = data->files[i];
 
@@ -968,19 +918,45 @@ static void show_numstat(struct diffstat_t* data, struct diff_options *options)
                        printf("-\t-\t");
                else
                        printf("%d\t%d\t", file->added, file->deleted);
-               if (!file->is_renamed) {
-                       write_name_quoted(file->name, stdout, options->line_termination);
+               if (options->line_termination) {
+                       fill_print_name(file);
+                       if (!file->is_renamed)
+                               write_name_quoted(file->name, stdout,
+                                                 options->line_termination);
+                       else {
+                               fputs(file->print_name, stdout);
+                               putchar(options->line_termination);
+                       }
                } else {
-                       fputs(file->name, stdout);
-                       putchar(options->line_termination);
+                       if (file->is_renamed) {
+                               putchar('\0');
+                               write_name_quoted(file->from_name, stdout, '\0');
+                       }
+                       write_name_quoted(file->name, stdout, '\0');
                }
        }
 }
 
+static void free_diffstat_info(struct diffstat_t *diffstat)
+{
+       int i;
+       for (i = 0; i < diffstat->nr; i++) {
+               struct diffstat_file *f = diffstat->files[i];
+               if (f->name != f->print_name)
+                       free(f->print_name);
+               free(f->name);
+               free(f->from_name);
+               free(f);
+       }
+       free(diffstat->files);
+}
+
 struct checkdiff_t {
        struct xdiff_emit_state xm;
        const char *filename;
        int lineno, color_diff;
+       unsigned ws_rule;
+       unsigned status;
 };
 
 static void checkdiff_consume(void *priv, char *line, unsigned long len)
@@ -989,36 +965,19 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len)
        const char *ws = diff_get_color(data->color_diff, DIFF_WHITESPACE);
        const char *reset = diff_get_color(data->color_diff, DIFF_RESET);
        const char *set = diff_get_color(data->color_diff, DIFF_FILE_NEW);
+       char *err;
 
        if (line[0] == '+') {
-               int i, spaces = 0, space_before_tab = 0, white_space_at_end = 0;
-
-               /* check space before tab */
-               for (i = 1; i < len && (line[i] == ' ' || line[i] == '\t'); i++)
-                       if (line[i] == ' ')
-                               spaces++;
-               if (line[i - 1] == '\t' && spaces)
-                       space_before_tab = 1;
-
-               /* check white space at line end */
-               if (line[len - 1] == '\n')
-                       len--;
-               if (isspace(line[len - 1]))
-                       white_space_at_end = 1;
-
-               if (space_before_tab || white_space_at_end) {
-                       printf("%s:%d: %s", data->filename, data->lineno, ws);
-                       if (space_before_tab) {
-                               printf("space before tab");
-                               if (white_space_at_end)
-                                       putchar(',');
-                       }
-                       if (white_space_at_end)
-                               printf("white space at end");
-                       printf(":%s ", reset);
-                       emit_line_with_ws(1, set, reset, ws, line, len);
-               }
-
+               data->status = check_and_emit_line(line + 1, len - 1,
+                   data->ws_rule, NULL, NULL, NULL, NULL);
+               if (!data->status)
+                       return;
+               err = whitespace_error_string(data->status);
+               printf("%s:%d: %s.\n", data->filename, data->lineno, err);
+               free(err);
+               emit_line(set, reset, line, 1);
+               (void)check_and_emit_line(line + 1, len - 1, data->ws_rule,
+                   stdout, set, reset, ws);
                data->lineno++;
        } else if (line[0] == ' ')
                data->lineno++;
@@ -1317,6 +1276,7 @@ static void builtin_diff(const char *name_a,
                ecbdata.label_path = lbl;
                ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF);
                ecbdata.found_changesp = &o->found_changes;
+               ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a);
                xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
                xecfg.ctxlen = o->context;
                xecfg.flags = XDL_EMIT_FUNCNAMES;
@@ -1334,7 +1294,7 @@ static void builtin_diff(const char *name_a,
                if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS))
                        ecbdata.diff_words =
                                xcalloc(1, sizeof(struct diff_words_data));
-               xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+               xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
                if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS))
                        free_diff_words_data(&ecbdata);
        }
@@ -1387,7 +1347,7 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
                xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
                ecb.outf = xdiff_outf;
                ecb.priv = diffstat;
-               xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+               xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
        }
 
  free_and_return:
@@ -1410,6 +1370,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
        data.filename = name_b ? name_b : name_a;
        data.lineno = 0;
        data.color_diff = DIFF_OPT_TST(o, COLOR_DIFF);
+       data.ws_rule = whitespace_rule(data.filename);
 
        if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
                die("unable to read files to diff");
@@ -1426,11 +1387,13 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
                xpp.flags = XDF_NEED_MINIMAL;
                ecb.outf = xdiff_outf;
                ecb.priv = &data;
-               xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+               xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
        }
  free_and_return:
        diff_free_filespec_data(one);
        diff_free_filespec_data(two);
+       if (data.status)
+               DIFF_OPT_SET(o, CHECK_FAILED);
 }
 
 struct diff_filespec *alloc_filespec(const char *path)
@@ -2838,7 +2801,7 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
                xecfg.flags = XDL_EMIT_FUNCNAMES;
                ecb.outf = xdiff_outf;
                ecb.priv = &data;
-               xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+               xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
        }
 
        SHA1_Final(sha1, &ctx);
@@ -2925,8 +2888,9 @@ void diff_flush(struct diff_options *options)
                        show_numstat(&diffstat, options);
                if (output_format & DIFF_FORMAT_DIFFSTAT)
                        show_stats(&diffstat, options);
-               else if (output_format & DIFF_FORMAT_SHORTSTAT)
+               if (output_format & DIFF_FORMAT_SHORTSTAT)
                        show_shortstats(&diffstat);
+               free_diffstat_info(&diffstat);
                separator++;
        }
 
@@ -3110,6 +3074,20 @@ void diffcore_std(struct diff_options *options)
                DIFF_OPT_CLR(options, HAS_CHANGES);
 }
 
+int diff_result_code(struct diff_options *opt, int status)
+{
+       int result = 0;
+       if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
+           !(opt->output_format & DIFF_FORMAT_CHECKDIFF))
+               return status;
+       if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
+           DIFF_OPT_TST(opt, HAS_CHANGES))
+               result |= 01;
+       if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) &&
+           DIFF_OPT_TST(opt, CHECK_FAILED))
+               result |= 02;
+       return result;
+}
 
 void diff_addremove(struct diff_options *options,
                    int addremove, unsigned mode,