Re: [PATCH 1/3] for-each-ref: introduce %C(...) for color

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On Fri, Sep 27, 2013 at 8:10 AM, Ramkumar Ramachandra
<artagnon@xxxxxxxxx> wrote:
> Enhance 'git for-each-ref' with color formatting options.  You can now
> use the following format in for-each-ref:
>
>   %C(green)%(refname:short)%C(reset)
>
> Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
> ---
>  Documentation/git-for-each-ref.txt |  4 +++-
>  builtin/for-each-ref.c             | 23 +++++++++++++++++++----
>  2 files changed, 22 insertions(+), 5 deletions(-)
>
> diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
> index f2e08d1..078a116 100644
> --- a/Documentation/git-for-each-ref.txt
> +++ b/Documentation/git-for-each-ref.txt
> @@ -45,7 +45,9 @@ OPTIONS
>         It also interpolates `%%` to `%`, and `%xx` where `xx`
>         are hex digits interpolates to character with hex code
>         `xx`; for example `%00` interpolates to `\0` (NUL),
> -       `%09` to `\t` (TAB) and `%0a` to `\n` (LF).
> +       `%09` to `\t` (TAB) and `%0a` to `\n` (LF). Additionally,
> +       colors can be specified using `%C(colorname)`. Use
> +       `%C(reset)` to reset the color.

Reduce the color explanation here and refer to the config page.
Something like pretty-formats does:

    '%C(...)': color specification, as described in color.branch.*
config option;

>
>  <pattern>...::
>         If one or more patterns are given, only refs are shown that
> diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
> index 1d4083c..a1ca186 100644
> --- a/builtin/for-each-ref.c
> +++ b/builtin/for-each-ref.c
> @@ -9,6 +9,7 @@
>  #include "quote.h"
>  #include "parse-options.h"
>  #include "remote.h"
> +#include "color.h"
>
>  /* Quoting styles */
>  #define QUOTE_NONE 0
> @@ -155,10 +156,13 @@ static const char *find_next(const char *cp)
>         while (*cp) {
>                 if (*cp == '%') {
>                         /*
> +                        * %C( is the start of a color;
>                          * %( is the start of an atom;
>                          * %% is a quoted per-cent.
>                          */
> -                       if (cp[1] == '(')
> +                       if (cp[1] == 'C' && cp[2] == '(')
> +                               return cp;
> +                       else if (cp[1] == '(')
>                                 return cp;
>                         else if (cp[1] == '%')
>                                 cp++; /* skip over two % */
> @@ -180,8 +184,11 @@ static int verify_format(const char *format)
>                 const char *ep = strchr(sp, ')');
>                 if (!ep)
>                         return error("malformed format string %s", sp);
> -               /* sp points at "%(" and ep points at the closing ")" */
> -               parse_atom(sp + 2, ep);
> +               /* Ignore color specifications: %C(
> +                * sp points at "%(" and ep points at the closing ")"
> +                */
> +               if (prefixcmp(sp, "%C("))
> +                       parse_atom(sp + 2, ep);
>                 cp = ep + 1;
>         }
>         return 0;
> @@ -933,12 +940,20 @@ static void emit(const char *cp, const char *ep)
>  static void show_ref(struct refinfo *info, const char *format, int quote_style)
>  {
>         const char *cp, *sp, *ep;
> +       char color[COLOR_MAXLEN];
>
>         for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
>                 ep = strchr(sp, ')');
>                 if (cp < sp)
>                         emit(cp, sp);
> -               print_value(info, parse_atom(sp + 2, ep), quote_style);
> +
> +               /* Do we have a color specification? */
> +               if (!prefixcmp(sp, "%C("))
> +                       color_parse_mem(sp + 3, ep - sp - 3, "--format", color);
> +               else {
> +                       printf("%s", color);

'color' used uninitialized here?

> +                       print_value(info, parse_atom(sp + 2, ep), quote_style);
> +               }
>         }
>         if (*cp) {
>                 sp = cp + strlen(cp);
> --
> 1.8.4.478.g55109e3
>
> --
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