git-help: add "help.format" config variable.

[git.git] / help.c

diff --git a/help.c b/help.c
index c96b1670f33a97daef215ee691016a8bfa9555c9..551b5b93b37f49e53746cb628416ab34d1dd9bd5 100644 (file)
--- a/help.c
+++ b/help.c
@@ -8,6 +8,44 @@
 #include "exec_cmd.h"
 #include "common-cmds.h"
 
+static const char *help_default_format;
+
+static enum help_format {
+       man_format,
+       info_format,
+       web_format,
+} help_format = man_format;
+
+static void parse_help_format(const char *format)
+{
+       if (!format) {
+               help_format = man_format;
+               return;
+       }
+       if (!strcmp(format, "man")) {
+               help_format = man_format;
+               return;
+       }
+       if (!strcmp(format, "info")) {
+               help_format = info_format;
+               return;
+       }
+       if (!strcmp(format, "web") || !strcmp(format, "html")) {
+               help_format = web_format;
+               return;
+       }
+       die("unrecognized help format '%s'", format);
+}
+
+static int git_help_config(const char *var, const char *value)
+{
+       if (!strcmp(var, "help.format")) {
+               help_default_format = xstrdup(value);
+               return 0;
+       }
+       return git_default_config(var, value);
+}
+
 /* most GUI terminals set COLUMNS (although some don't export it) */
 static int term_columns(void)
 {
@@ -331,8 +369,30 @@ int cmd_help(int argc, const char **argv, const char *prefix)
                show_info_page(argc > 2 ? argv[2] : NULL);
        }
 
-       else
-               show_man_page(help_cmd);
+       else if (!strcmp(help_cmd, "--man") || !strcmp(help_cmd, "-m")) {
+               show_man_page(argc > 2 ? argv[2] : NULL);
+       }
+
+       else {
+               int nongit;
+
+               setup_git_directory_gently(&nongit);
+               git_config(git_help_config);
+               if (help_default_format)
+                       parse_help_format(help_default_format);
+
+               switch (help_format) {
+               case man_format:
+                       show_man_page(help_cmd);
+                       break;
+               case info_format:
+                       show_info_page(help_cmd);
+                       break;
+               case web_format:
+                       show_html_page(help_cmd);
+                       break;
+               }
+       }
 
        return 0;
 }