Code

Allow tig to parse control-modified chars in tigrc
[tig.git] / tig.c
diff --git a/tig.c b/tig.c
index 3e4d369063259d67589aabae0c8a8a47d871148a..a501db044b3c718dac45dbffb4f8b30f02faccb9 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -209,7 +209,7 @@ string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
 #define string_add(dst, from, src) \
        string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
 
-static void
+static size_t
 string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
 {
        size_t size, pos;
@@ -228,6 +228,7 @@ string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
        }
 
        dst[size] = 0;
+       return pos;
 }
 
 static char *
@@ -683,15 +684,23 @@ argv_free(const char *argv[])
        argv[0] = NULL;
 }
 
+static size_t
+argv_size(const char **argv)
+{
+       int argc = 0;
+
+       while (argv && argv[argc])
+               argc++;
+
+       return argc;
+}
+
 DEFINE_ALLOCATOR(argv_realloc, const char *, SIZEOF_ARG)
 
 static bool
 argv_append(const char ***argv, const char *arg)
 {
-       int argc = 0;
-
-       while (*argv && (*argv)[argc])
-               argc++;
+       size_t argc = argv_size(*argv);
 
        if (!argv_realloc(argv, argc, 2))
                return FALSE;
@@ -701,6 +710,17 @@ argv_append(const char ***argv, const char *arg)
        return TRUE;
 }
 
+static bool
+argv_append_array(const char ***dst_argv, const char *src_argv[])
+{
+       int i;
+
+       for (i = 0; src_argv && src_argv[i]; i++)
+               if (!argv_append(dst_argv, src_argv[i]))
+                       return FALSE;
+       return TRUE;
+}
+
 static bool
 argv_copy(const char ***dst, const char *src[])
 {
@@ -1222,6 +1242,9 @@ static char opt_git_dir[SIZEOF_STR]       = "";
 static signed char opt_is_inside_work_tree     = -1; /* set to TRUE or FALSE */
 static char opt_editor[SIZEOF_STR]     = "";
 static FILE *opt_tty                   = NULL;
+static const char **opt_diff_args      = NULL;
+static const char **opt_rev_args       = NULL;
+static const char **opt_file_args      = NULL;
 
 #define is_initial_commit()    (!get_ref_head())
 #define is_head_commit(rev)    (!strcmp((rev), "HEAD") || (get_ref_head() && !strcmp(rev, get_ref_head()->id)))
@@ -1597,16 +1620,17 @@ get_key_value(const char *name)
                if (!strcasecmp(key_table[i].name, name))
                        return key_table[i].value;
 
+       if (strlen(name) == 2 && name[0] == '^' && isprint(*name))
+               return (int)name[1] & 0x1f;
        if (strlen(name) == 1 && isprint(*name))
                return (int) *name;
-
        return ERR;
 }
 
 static const char *
 get_key_name(int key_value)
 {
-       static char key_char[] = "'X'";
+       static char key_char[] = "'X'\0";
        const char *seq = NULL;
        int key;
 
@@ -1614,10 +1638,17 @@ get_key_name(int key_value)
                if (key_table[key].value == key_value)
                        seq = key_table[key].name;
 
-       if (seq == NULL &&
-           key_value < 127 &&
-           isprint(key_value)) {
-               key_char[1] = (char) key_value;
+       if (seq == NULL && key_value < 0x7f) {
+               char *s = key_char + 1;
+
+               if (key_value >= 0x20) {
+                       *s++ = key_value;
+               } else {
+                       *s++ = '^';
+                       *s++ = 0x40 | (key_value & 0x1f);
+               }
+               *s++ = '\'';
+               *s++ = '\0';
                seq = key_char;
        }
 
@@ -2120,6 +2151,7 @@ load_options(void)
        const char *home = getenv("HOME");
        const char *tigrc_user = getenv("TIGRC_USER");
        const char *tigrc_system = getenv("TIGRC_SYSTEM");
+       const char *tig_diff_opts = getenv("TIG_DIFF_OPTS");
        char buf[SIZEOF_STR];
 
        if (!tigrc_system)
@@ -2137,6 +2169,17 @@ load_options(void)
         * that conflict with keybindings. */
        add_builtin_run_requests();
 
+       if (!opt_diff_args && tig_diff_opts && *tig_diff_opts) {
+               static const char *diff_opts[SIZEOF_ARG] = { NULL };
+               int argc = 0;
+
+               if (!string_format(buf, "%s", tig_diff_opts) ||
+                   !argv_from_string(diff_opts, &argc, buf))
+                       die("TIG_DIFF_OPTS contains too many arguments");
+               else if (!argv_copy(&opt_diff_args, diff_opts))
+                       die("Failed to format TIG_DIFF_OPTS arguments");
+       }
+
        return OK;
 }
 
@@ -2281,7 +2324,7 @@ static struct view views[] = {
        VIEW_(BLAME,  "blame",  &blame_ops,  TRUE,  ref_commit),
        VIEW_(BRANCH, "branch", &branch_ops, TRUE,  ref_head),
        VIEW_(HELP,   "help",   &help_ops,   FALSE, ""),
-       VIEW_(PAGER,  "pager",  &pager_ops,  FALSE, "stdin"),
+       VIEW_(PAGER,  "pager",  &pager_ops,  FALSE, ""),
        VIEW_(STATUS, "status", &status_ops, TRUE,  ""),
        VIEW_(STAGE,  "stage",  &stage_ops,  TRUE,  ""),
 };
@@ -2382,7 +2425,15 @@ draw_space(struct view *view, enum line_type type, int max, int spaces)
 static bool
 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
 {
-       view->col += draw_chars(view, type, string, view->width + view->yoffset - view->col, trim);
+       char text[SIZEOF_STR];
+
+       do {
+               size_t pos = string_expand(text, sizeof(text), string, opt_tab_size);
+
+               view->col += draw_chars(view, type, text, view->width + view->yoffset - view->col, trim);
+               string += pos;
+       } while (*string && view->width + view->yoffset > view->col);
+
        return view->width + view->yoffset <= view->col;
 }
 
@@ -3165,6 +3216,22 @@ format_argv(const char ***dst_argv, const char *src_argv[], bool replace)
                const char *arg = src_argv[argc];
                size_t bufpos = 0;
 
+               if (!strcmp(arg, "%(fileargs)")) {
+                       if (!argv_append_array(dst_argv, opt_file_args))
+                               break;
+                       continue;
+
+               } else if (!strcmp(arg, "%(diffargs)")) {
+                       if (!argv_append_array(dst_argv, opt_diff_args))
+                               break;
+                       continue;
+
+               } else if (!strcmp(arg, "%(revargs)")) {
+                       if (!argv_append_array(dst_argv, opt_rev_args))
+                               break;
+                       continue;
+               }
+
                while (arg) {
                        char *next = strstr(arg, "%(");
                        int len = next - arg;
@@ -3649,6 +3716,13 @@ view_driver(struct view *view, enum request request)
                break;
 
        case REQ_VIEW_PAGER:
+               if (view == NULL) {
+                       if (!io_open(&VIEW(REQ_VIEW_PAGER)->io, ""))
+                               die("Failed to open stdin");
+                       open_view(view, request, OPEN_PREPARED);
+                       break;
+               }
+
                if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
                        report("No pager content, press %s to run command from prompt",
                               get_key(view->keymap, REQ_PROMPT));
@@ -3947,73 +4021,6 @@ parse_author_line(char *ident, const char **author, struct time *time)
        }
 }
 
-static bool
-open_commit_parent_menu(char buf[SIZEOF_STR], int *parents)
-{
-       char rev[SIZEOF_REV];
-       const char *revlist_argv[] = {
-               "git", "log", "--no-color", "-1", "--pretty=format:%s", rev, NULL
-       };
-       struct menu_item *items;
-       char text[SIZEOF_STR];
-       bool ok = TRUE;
-       int i;
-
-       items = calloc(*parents + 1, sizeof(*items));
-       if (!items)
-               return FALSE;
-
-       for (i = 0; i < *parents; i++) {
-               string_copy_rev(rev, &buf[SIZEOF_REV * i]);
-               if (!io_run_buf(revlist_argv, text, sizeof(text)) ||
-                   !(items[i].text = strdup(text))) {
-                       ok = FALSE;
-                       break;
-               }
-       }
-
-       if (ok) {
-               *parents = 0;
-               ok = prompt_menu("Select parent", items, parents);
-       }
-       for (i = 0; items[i].text; i++)
-               free((char *) items[i].text);
-       free(items);
-       return ok;
-}
-
-static bool
-select_commit_parent(const char *id, char rev[SIZEOF_REV], const char *path)
-{
-       char buf[SIZEOF_STR * 4];
-       const char *revlist_argv[] = {
-               "git", "log", "--no-color", "-1",
-                       "--pretty=format:%P", id, "--", path, NULL
-       };
-       int parents;
-
-       if (!io_run_buf(revlist_argv, buf, sizeof(buf)) ||
-           (parents = strlen(buf) / 40) < 0) {
-               report("Failed to get parent information");
-               return FALSE;
-
-       } else if (parents == 0) {
-               if (path)
-                       report("Path '%s' does not exist in the parent", path);
-               else
-                       report("The selected commit has no parents");
-               return FALSE;
-       }
-
-       if (parents == 1)
-               parents = 0;
-       else if (!open_commit_parent_menu(buf, &parents))
-               return FALSE;
-
-       string_copy_rev(rev, &buf[41 * parents]);
-       return TRUE;
-}
-
 /*
  * Pager backend
  */
@@ -4021,13 +4028,10 @@ select_commit_parent(const char *id, char rev[SIZEOF_REV], const char *path)
 static bool
 pager_draw(struct view *view, struct line *line, unsigned int lineno)
 {
-       char text[SIZEOF_STR];
-
        if (opt_line_number && draw_lineno(view, lineno))
                return TRUE;
 
-       string_expand(text, sizeof(text), line->data, opt_tab_size);
-       draw_text(view, line->type, text, TRUE);
+       draw_text(view, line->type, line->data, TRUE);
        return TRUE;
 }
 
@@ -4201,14 +4205,42 @@ static struct view_ops log_ops = {
 
 static const char *diff_argv[SIZEOF_ARG] = {
        "git", "show", "--pretty=fuller", "--no-color", "--root",
-               "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
+               "--patch-with-stat", "--find-copies-harder", "-C",
+               "%(diffargs)", "%(commit)", "--", "%(fileargs)", NULL
 };
 
+static bool
+diff_read(struct view *view, char *data)
+{
+       if (!data) {
+               /* Fall back to retry if no diff will be shown. */
+               if (view->lines == 0 && opt_file_args) {
+                       int pos = argv_size(view->argv)
+                               - argv_size(opt_file_args) - 1;
+
+                       if (pos > 0 && !strcmp(view->argv[pos], "--")) {
+                               for (; view->argv[pos]; pos++) {
+                                       free((void *) view->argv[pos]);
+                                       view->argv[pos] = NULL;
+                               }
+
+                               if (view->pipe)
+                                       io_done(view->pipe);
+                               if (io_run(&view->io, IO_RD, view->dir, view->argv))
+                                       return FALSE;
+                       }
+               }
+               return TRUE;
+       }
+
+       return pager_read(view, data);
+}
+
 static struct view_ops diff_ops = {
        "line",
        diff_argv,
        NULL,
-       pager_read,
+       diff_read,
        pager_draw,
        pager_request,
        pager_grep,
@@ -4867,7 +4899,8 @@ struct blame_commit {
        const char *author;             /* Author of the commit. */
        struct time time;               /* Date from the author ident. */
        char filename[128];             /* Name of file. */
-       bool has_previous;              /* Was a "previous" line detected. */
+       char parent_id[SIZEOF_REV];     /* Parent/previous SHA1 ID. */
+       char parent_filename[128];      /* Parent/previous name of file. */
 };
 
 struct blame {
@@ -4880,6 +4913,7 @@ static bool
 blame_open(struct view *view)
 {
        char path[SIZEOF_STR];
+       size_t i;
 
        if (!view->prev && *opt_prefix) {
                string_copy(path, opt_file);
@@ -4897,6 +4931,24 @@ blame_open(struct view *view)
                        return FALSE;
        }
 
+       /* First pass: remove multiple references to the same commit. */
+       for (i = 0; i < view->lines; i++) {
+               struct blame *blame = view->line[i].data;
+
+               if (blame->commit && blame->commit->id[0])
+                       blame->commit->id[0] = 0;
+               else
+                       blame->commit = NULL;
+       }
+
+       /* Second pass: free existing references. */
+       for (i = 0; i < view->lines; i++) {
+               struct blame *blame = view->line[i].data;
+
+               if (blame->commit)
+                       free(blame->commit);
+       }
+
        setup_update(view, opt_file);
        string_format(view->ref, "%s ...", opt_file);
 
@@ -5066,7 +5118,11 @@ blame_read(struct view *view, char *line)
                string_ncopy(commit->title, line, strlen(line));
 
        } else if (match_blame_header("previous ", &line)) {
-               commit->has_previous = TRUE;
+               if (strlen(line) <= SIZEOF_REV)
+                       return FALSE;
+               string_copy_rev(commit->parent_id, line);
+               line += SIZEOF_REV;
+               string_ncopy(commit->parent_filename, line, strlen(line));
 
        } else if (match_blame_header("filename ", &line)) {
                string_ncopy(commit->filename, line, strlen(line));
@@ -5082,7 +5138,6 @@ blame_draw(struct view *view, struct line *line, unsigned int lineno)
        struct blame *blame = line->data;
        struct time *time = NULL;
        const char *id = NULL, *author = NULL;
-       char text[SIZEOF_STR];
 
        if (blame->commit && *blame->commit->filename) {
                id = blame->commit->id;
@@ -5102,8 +5157,7 @@ blame_draw(struct view *view, struct line *line, unsigned int lineno)
        if (draw_lineno(view, lineno))
                return TRUE;
 
-       string_expand(text, sizeof(text), blame->text, opt_tab_size);
-       draw_text(view, LINE_DEFAULT, text, TRUE);
+       draw_text(view, LINE_DEFAULT, blame->text, TRUE);
        return TRUE;
 }
 
@@ -5122,16 +5176,20 @@ check_blame_commit(struct blame *blame, bool check_null_id)
 static void
 setup_blame_parent_line(struct view *view, struct blame *blame)
 {
+       char from[SIZEOF_REF + SIZEOF_STR];
+       char to[SIZEOF_REF + SIZEOF_STR];
        const char *diff_tree_argv[] = {
-               "git", "diff-tree", "-U0", blame->commit->id,
-                       "--", blame->commit->filename, NULL
+               "git", "diff", "--no-textconv", "--no-extdiff", "--no-color",
+                       "-U0", from, to, "--", NULL
        };
        struct io io;
        int parent_lineno = -1;
        int blamed_lineno = -1;
        char *line;
 
-       if (!io_run(&io, IO_RD, NULL, diff_tree_argv))
+       if (!string_format(from, "%s:%s", opt_ref, opt_file) ||
+           !string_format(to, "%s:%s", blame->commit->id, blame->commit->filename) ||
+           !io_run(&io, IO_RD, NULL, diff_tree_argv))
                return;
 
        while ((line = io_get(&io, '\n', TRUE))) {
@@ -5173,10 +5231,13 @@ blame_request(struct view *view, enum request request, struct line *line)
                break;
 
        case REQ_PARENT:
-               if (check_blame_commit(blame, TRUE) &&
-                   select_commit_parent(blame->commit->id, opt_ref,
-                                        blame->commit->filename)) {
-                       string_copy(opt_file, blame->commit->filename);
+               if (!check_blame_commit(blame, TRUE))
+                       break;
+               if (!*blame->commit->parent_id) {
+                       report("The selected commit has no parents");
+               } else {
+                       string_copy_rev(opt_ref, blame->commit->parent_id);
+                       string_copy(opt_file, blame->commit->parent_filename);
                        setup_blame_parent_line(view, blame);
                        open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
                }
@@ -5197,7 +5258,7 @@ blame_request(struct view *view, enum request request, struct line *line)
                                        "-C", "-M", "HEAD", "--", view->vid, NULL
                        };
 
-                       if (!blame->commit->has_previous) {
+                       if (!*blame->commit->parent_id) {
                                diff_index_argv[1] = "diff";
                                diff_index_argv[2] = "--no-color";
                                diff_index_argv[6] = "--";
@@ -6696,7 +6757,8 @@ update_rev_graph(struct view *view, struct rev_graph *graph)
 
 static const char *main_argv[SIZEOF_ARG] = {
        "git", "log", "--no-color", "--pretty=raw", "--parents",
-                     "--topo-order", "%(head)", NULL
+               "--topo-order", "%(diffargs)", "%(revargs)",
+               "--", "%(fileargs)", NULL
 };
 
 static bool
@@ -7054,12 +7116,13 @@ get_input(int prompt_position)
 {
        struct view *view;
        int i, key, cursor_y, cursor_x;
-       bool loading = FALSE;
 
        if (prompt_position)
                input_mode = TRUE;
 
        while (TRUE) {
+               bool loading = FALSE;
+
                foreach_view (view, i) {
                        update_view(view);
                        if (view_is_displayed(view) && view->has_scrolled &&
@@ -7676,27 +7739,51 @@ warn(const char *msg, ...)
        va_end(args);
 }
 
+static const char ***filter_args;
+
+static int
+read_filter_args(char *name, size_t namelen, char *value, size_t valuelen)
+{
+       return argv_append(filter_args, name) ? OK : ERR;
+}
+
+static void
+filter_rev_parse(const char ***args, const char *arg1, const char *arg2, const char *argv[])
+{
+       const char *rev_parse_argv[SIZEOF_ARG] = { "git", "rev-parse", arg1, arg2 };
+       const char **all_argv = NULL;
+
+       filter_args = args;
+       if (!argv_append_array(&all_argv, rev_parse_argv) ||
+           !argv_append_array(&all_argv, argv) ||
+           !io_run_load(all_argv, "\n", read_filter_args) == ERR)
+               die("Failed to split arguments");
+       argv_free(all_argv);
+       free(all_argv);
+}
+
+static void
+filter_options(const char *argv[])
+{
+       filter_rev_parse(&opt_file_args, "--no-revs", "--no-flags", argv);
+       filter_rev_parse(&opt_diff_args, "--no-revs", "--flags", argv);
+       filter_rev_parse(&opt_rev_args, "--symbolic", "--revs-only", argv);
+}
+
 static enum request
 parse_options(int argc, const char *argv[])
 {
        enum request request = REQ_VIEW_MAIN;
        const char *subcommand;
        bool seen_dashdash = FALSE;
-       /* XXX: This is vulnerable to the user overriding options
-        * required for the main view parser. */
-       const char *custom_argv[SIZEOF_ARG] = {
-               "git", "log", "--no-color", "--pretty=raw", "--parents",
-                       "--topo-order", NULL
-       };
-       int i, j = 6;
+       const char **filter_argv = NULL;
+       int i;
 
-       if (!isatty(STDIN_FILENO)) {
-               io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
+       if (!isatty(STDIN_FILENO))
                return REQ_VIEW_PAGER;
-       }
 
        if (argc <= 1)
-               return REQ_NONE;
+               return REQ_VIEW_MAIN;
 
        subcommand = argv[1];
        if (!strcmp(subcommand, "status")) {
@@ -7724,16 +7811,16 @@ parse_options(int argc, const char *argv[])
                subcommand = NULL;
        }
 
-       if (subcommand) {
-               custom_argv[1] = subcommand;
-               j = 2;
-       }
-
        for (i = 1 + !!subcommand; i < argc; i++) {
                const char *opt = argv[i];
 
-               if (seen_dashdash || !strcmp(opt, "--")) {
+               if (seen_dashdash) {
+                       argv_append(&opt_file_args, opt);
+                       continue;
+
+               } else if (!strcmp(opt, "--")) {
                        seen_dashdash = TRUE;
+                       continue;
 
                } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
                        printf("tig version %s\n", TIG_VERSION);
@@ -7742,15 +7829,18 @@ parse_options(int argc, const char *argv[])
                } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
                        printf("%s\n", usage);
                        quit(0);
+
+               } else if (!strcmp(opt, "--all")) {
+                       argv_append(&opt_rev_args, opt);
+                       continue;
                }
 
-               custom_argv[j++] = opt;
-               if (j >= ARRAY_SIZE(custom_argv))
+               if (!argv_append(&filter_argv, opt))
                        die("command too long");
        }
 
-       if (!prepare_update(VIEW(request), custom_argv, NULL))
-               die("Failed to format arguments");
+       if (filter_argv)
+               filter_options(filter_argv);
 
        return request;
 }
@@ -7798,17 +7888,18 @@ main(int argc, const char *argv[])
        if (load_refs() == ERR)
                die("Failed to load refs.");
 
-       foreach_view (view, i)
+       foreach_view (view, i) {
+               if (getenv(view->cmd_env))
+                       warn("Use of the %s environment variable is deprecated,"
+                            " use options or TIG_DIFF_ARGS instead",
+                            view->cmd_env);
                if (!argv_from_env(view->ops->argv, view->cmd_env))
                        die("Too many arguments in the `%s` environment variable",
                            view->cmd_env);
+       }
 
        init_display();
 
-       if (request != REQ_NONE)
-               open_view(NULL, request, OPEN_PREPARED);
-       request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
-
        while (view_driver(display[current_view], request)) {
                int key = get_input(0);