Colorize 'commit' lines in log ui

When paging through the output of git-whatchanged, the color cues help to
visually navigate within a diff. However, it is difficult to notice when a
new commit starts, because the commit and log are shown in the "normal"
color. This patch colorizes the 'commit' line, customizable through
diff.colors.commit and defaulting to yellow.

As a side effect, some of the diff color engine (slot enum, get_color) has
become accessible outside of diff.c.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/diff.c b/diff.c
index 8b44756136dbb040c7c82e07ca535be0b66ffb30..6a713764831e7521958f4b280f2e1d3911fb3cea 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -17,15 +17,6 @@ static int diff_detect_rename_default = 0;
 static int diff_rename_limit_default = -1;
 static int diff_use_color_default = 0;
 
-enum color_diff {
-       DIFF_RESET = 0,
-       DIFF_PLAIN = 1,
-       DIFF_METAINFO = 2,
-       DIFF_FRAGINFO = 3,
-       DIFF_FILE_OLD = 4,
-       DIFF_FILE_NEW = 5,
-};
-
 /* "\033[1;38;5;2xx;48;5;2xxm\0" is 23 bytes */
 static char diff_colors[][24] = {
        "\033[m",       /* reset */
@@ -33,7 +24,8 @@ static char diff_colors[][24] = {
        "\033[1m",      /* bold */
        "\033[36m",     /* cyan */
        "\033[31m",     /* red */
-       "\033[32m"      /* green */
+       "\033[32m",     /* green */
+       "\033[33m"      /* yellow */
 };
 
 static int parse_diff_color_slot(const char *var, int ofs)
@@ -48,6 +40,8 @@ static int parse_diff_color_slot(const char *var, int ofs)
                return DIFF_FILE_OLD;
        if (!strcasecmp(var+ofs, "new"))
                return DIFF_FILE_NEW;
+       if (!strcasecmp(var+ofs, "commit"))
+               return DIFF_COMMIT;
        die("bad config variable '%s'", var);
 }
 
@@ -370,7 +364,7 @@ struct emit_callback {
        const char **label_path;
 };
 
-static inline const char *get_color(int diff_use_color, enum color_diff ix)
+const char *diff_get_color(int diff_use_color, enum color_diff ix)
 {
        if (diff_use_color)
                return diff_colors[ix];
@@ -381,8 +375,8 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 {
        int i;
        struct emit_callback *ecbdata = priv;
-       const char *set = get_color(ecbdata->color_diff, DIFF_METAINFO);
-       const char *reset = get_color(ecbdata->color_diff, DIFF_RESET);
+       const char *set = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
+       const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
 
        if (ecbdata->label_path[0]) {
                printf("%s--- %s%s\n", set, ecbdata->label_path[0], reset);
@@ -397,7 +391,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
                ;
        if (2 <= i && i < len && line[i] == ' ') {
                ecbdata->nparents = i - 1;
-               set = get_color(ecbdata->color_diff, DIFF_FRAGINFO);
+               set = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO);
        }
        else if (len < ecbdata->nparents)
                set = reset;
@@ -410,7 +404,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
                        else if (line[i] == '+')
                                color = DIFF_FILE_NEW;
                }
-               set = get_color(ecbdata->color_diff, color);
+               set = diff_get_color(ecbdata->color_diff, color);
        }
        if (len > 0 && line[len-1] == '\n')
                len--;
@@ -767,8 +761,8 @@ static void builtin_diff(const char *name_a,
        mmfile_t mf1, mf2;
        const char *lbl[2];
        char *a_one, *b_two;
-       const char *set = get_color(o->color_diff, DIFF_METAINFO);
-       const char *reset = get_color(o->color_diff, DIFF_RESET);
+       const char *set = diff_get_color(o->color_diff, DIFF_METAINFO);
+       const char *reset = diff_get_color(o->color_diff, DIFF_RESET);
 
        a_one = quote_two("a/", name_a);
        b_two = quote_two("b/", name_b);

diff --git a/diff.h b/diff.h
index a06f959938d1313e45daa610a1f3eb71b4c3f835..2cced530fa60ad7206b2cdb1b2509f42469e8f73 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -69,6 +69,17 @@ struct diff_options {
        add_remove_fn_t add_remove;
 };
 
+enum color_diff {
+       DIFF_RESET = 0,
+       DIFF_PLAIN = 1,
+       DIFF_METAINFO = 2,
+       DIFF_FRAGINFO = 3,
+       DIFF_FILE_OLD = 4,
+       DIFF_FILE_NEW = 5,
+       DIFF_COMMIT = 6,
+};
+const char *diff_get_color(int diff_use_color, enum color_diff ix);
+
 extern const char mime_boundary_leader[];
 
 extern void diff_tree_setup_paths(const char **paths, struct diff_options *);

diff --git a/log-tree.c b/log-tree.c
index 9d8d46fa0038202bd49dee9cf5d1a60f781e5d7d..b71cf9ba41b3311b47cbf75bf894f8aeca5ef078 100644 (file)
--- a/log-tree.c
+++ b/log-tree.c
@@ -129,7 +129,8 @@ void show_log(struct rev_info *opt, const char *sep)
                        opt->diffopt.stat_sep = buffer;
                }
        } else {
-               printf("%s%s",
+               printf("%s%s%s",
+                      diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
                       opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
                       diff_unique_abbrev(commit->object.sha1, abbrev_commit));
                if (opt->parents)
@@ -139,6 +140,8 @@ void show_log(struct rev_info *opt, const char *sep)
                               diff_unique_abbrev(parent->object.sha1,
                                                  abbrev_commit));
                putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
+               printf("%s",
+                      diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
        }
 
        /*