write_index: optionally allow broken null sha1s

diff --git a/builtin/help.c b/builtin/help.c
index d1d71816a9df67721578bc29665c15887575caec..f1e236b9124f8b7bfd9aa5e926d525c6f4568268 100644 (file)
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -1,6 +1,4 @@
 /*
- * builtin-help.c
- *
  * Builtin help command
  */
 #include "cache.h"
@@ -36,10 +34,12 @@ enum help_format {
 static const char *html_path;
 
 static int show_all = 0;
+static int show_guides = 0;
 static unsigned int colopts;
 static enum help_format help_format = HELP_FORMAT_NONE;
 static struct option builtin_help_options[] = {
-       OPT_BOOLEAN('a', "all", &show_all, N_("print all available commands")),
+       OPT_BOOL('a', "all", &show_all, N_("print all available commands")),
+       OPT_BOOL('g', "guides", &show_guides, N_("print list of useful guides")),
        OPT_SET_INT('m', "man", &help_format, N_("show man page"), HELP_FORMAT_MAN),
        OPT_SET_INT('w', "web", &help_format, N_("show manual in web browser"),
                        HELP_FORMAT_WEB),
@@ -49,7 +49,7 @@ static struct option builtin_help_options[] = {
 };
 
 static const char * const builtin_help_usage[] = {
-       N_("git help [--all] [--man|--web|--info] [command]"),
+       N_("git help [--all] [--guides] [--man|--web|--info] [command]"),
        NULL
 };
 
@@ -413,6 +413,37 @@ static void show_html_page(const char *git_cmd)
        open_html(page_path.buf);
 }
 
+static struct {
+       const char *name;
+       const char *help;
+} common_guides[] = {
+       { "attributes", N_("Defining attributes per path") },
+       { "glossary", N_("A Git glossary") },
+       { "ignore", N_("Specifies intentionally untracked files to ignore") },
+       { "modules", N_("Defining submodule properties") },
+       { "revisions", N_("Specifying revisions and ranges for Git") },
+       { "tutorial", N_("A tutorial introduction to Git (for version 1.5.1 or newer)") },
+       { "workflows", N_("An overview of recommended workflows with Git") },
+};
+
+static void list_common_guides_help(void)
+{
+       int i, longest = 0;
+
+       for (i = 0; i < ARRAY_SIZE(common_guides); i++) {
+               if (longest < strlen(common_guides[i].name))
+                       longest = strlen(common_guides[i].name);
+       }
+
+       puts(_("The common Git guides are:\n"));
+       for (i = 0; i < ARRAY_SIZE(common_guides); i++) {
+               printf("   %s   ", common_guides[i].name);
+               mput_char(' ', longest - strlen(common_guides[i].name));
+               puts(_(common_guides[i].help));
+       }
+       putchar('\n');
+}
+
 int cmd_help(int argc, const char **argv, const char *prefix)
 {
        int nongit;
@@ -428,7 +459,16 @@ int cmd_help(int argc, const char **argv, const char *prefix)
                git_config(git_help_config, NULL);
                printf(_("usage: %s%s"), _(git_usage_string), "\n\n");
                list_commands(colopts, &main_cmds, &other_cmds);
+       }
+
+       if (show_guides)
+               list_common_guides_help();
+
+       if (show_all || show_guides) {
                printf("%s\n", _(git_more_info_string));
+               /*
+               * We're done. Ignore any remaining args
+               */
                return 0;
        }