grep: Colorize selected, context, and function lines

Colorize non-matching text of selected lines, context lines, and
function name lines.  The default for all three is no color, but they
can be configured using color.grep.<slot>.  The first two are similar
to the corresponding options in GNU grep, except that GNU grep applies
the color to the entire line, not just non-matching text.

Signed-off-by: Mark Lodato <lodatom@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/config.txt b/Documentation/config.txt
index d6e4a3e0cce71e78ec3bfc3f7753d240be265fb2..88e1d49d6e91e289f5caf58254d713fd8c523bf0 100644 (file)
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -688,12 +688,18 @@ color.grep.<slot>::
        part of the line to use the specified color, and is one of
 +
 --
+`context`;;
+       non-matching text in context lines (when using `-A`, `-B`, or `-C`)
 `filename`;;
        filename prefix (when not using `-h`)
+`function`;;
+       function name lines (when using `-p`)
 `linenumber`;;
        line number prefix (when using `-n`)
 `match`;;
        matching text
+`selected`;;
+       non-matching text in selected lines
 `separator`;;
        separators between fields on a line (`:`, `-`, and `=`)
        and between hunks (`--`)

diff --git a/builtin-grep.c b/builtin-grep.c
index 09c2f4913b24436489f6647b95368ee070554b14..d455176f78b929435207c21c4eabac5eabde3a63 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -299,12 +299,18 @@ static int grep_config(const char *var, const char *value, void *cb)
 
        if (!strcmp(var, "color.grep"))
                opt->color = git_config_colorbool(var, value, -1);
+       else if (!strcmp(var, "color.grep.context"))
+               color = opt->color_context;
        else if (!strcmp(var, "color.grep.filename"))
                color = opt->color_filename;
+       else if (!strcmp(var, "color.grep.function"))
+               color = opt->color_function;
        else if (!strcmp(var, "color.grep.linenumber"))
                color = opt->color_lineno;
        else if (!strcmp(var, "color.grep.match"))
                color = opt->color_match;
+       else if (!strcmp(var, "color.grep.selected"))
+               color = opt->color_selected;
        else if (!strcmp(var, "color.grep.separator"))
                color = opt->color_sep;
        else
@@ -879,9 +885,12 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
        opt.regflags = REG_NEWLINE;
        opt.max_depth = -1;
 
+       strcpy(opt.color_context, "");
        strcpy(opt.color_filename, "");
+       strcpy(opt.color_function, "");
        strcpy(opt.color_lineno, "");
        strcpy(opt.color_match, GIT_COLOR_BOLD_RED);
+       strcpy(opt.color_selected, "");
        strcpy(opt.color_sep, GIT_COLOR_CYAN);
        opt.color = -1;
        git_config(grep_config, &opt);

diff --git a/grep.c b/grep.c
index 42e915d762d82cdb81b5cb5028eee04b707a0aa5..b641305ff6e9a05b20d92e9c0274004625bd7f28 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -529,6 +529,7 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
                      const char *name, unsigned lno, char sign)
 {
        int rest = eol - bol;
+       char *line_color = NULL;
 
        if (opt->pre_context || opt->post_context) {
                if (opt->last_shown == 0) {
@@ -560,12 +561,18 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
                int ch = *eol;
                int eflags = 0;
 
+               if (sign == ':')
+                       line_color = opt->color_selected;
+               else if (sign == '-')
+                       line_color = opt->color_context;
+               else if (sign == '=')
+                       line_color = opt->color_function;
                *eol = '\0';
                while (next_match(opt, bol, eol, ctx, &match, eflags)) {
                        if (match.rm_so == match.rm_eo)
                                break;
 
-                       opt->output(opt, bol, match.rm_so);
+                       output_color(opt, bol, match.rm_so, line_color);
                        output_color(opt, bol + match.rm_so,
                                     match.rm_eo - match.rm_so,
                                     opt->color_match);
@@ -575,7 +582,7 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
                }
                *eol = ch;
        }
-       opt->output(opt, bol, rest);
+       output_color(opt, bol, rest, line_color);
        opt->output(opt, "\n", 1);
 }
 

diff --git a/grep.h b/grep.h
index 36919ee2175849c8dce1739e72f3e477812a53bc..2c4bdaca823c71f7628fb7626b7222e69db332a8 100644 (file)
--- a/grep.h
+++ b/grep.h
@@ -84,9 +84,12 @@ struct grep_opt {
        int color;
        int max_depth;
        int funcname;
+       char color_context[COLOR_MAXLEN];
        char color_filename[COLOR_MAXLEN];
+       char color_function[COLOR_MAXLEN];
        char color_lineno[COLOR_MAXLEN];
        char color_match[COLOR_MAXLEN];
+       char color_selected[COLOR_MAXLEN];
        char color_sep[COLOR_MAXLEN];
        int regflags;
        unsigned pre_context;