trace2: fix tracing when NO_PTHREADS is defined
[gitweb.git] / help.c
diff --git a/help.c b/help.c
index 60071a9beaaedf45730385b7fc1443b402c50156..520c9080e8e4abf7793af0966588aa370f09d316 100644 (file)
--- a/help.c
+++ b/help.c
 #include "cache.h"
 #include "config.h"
 #include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "levenshtein.h"
 #include "help.h"
-#include "common-cmds.h"
+#include "command-list.h"
 #include "string-list.h"
 #include "column.h"
 #include "version.h"
 #include "refs.h"
 #include "parse-options.h"
 
+struct category_description {
+       uint32_t category;
+       const char *desc;
+};
+static uint32_t common_mask =
+       CAT_init | CAT_worktree | CAT_info |
+       CAT_history | CAT_remote;
+static struct category_description common_categories[] = {
+       { CAT_init, N_("start a working area (see also: git help tutorial)") },
+       { CAT_worktree, N_("work on the current change (see also: git help everyday)") },
+       { CAT_info, N_("examine the history and state (see also: git help revisions)") },
+       { CAT_history, N_("grow, mark and tweak your common history") },
+       { CAT_remote, N_("collaborate (see also: git help workflows)") },
+       { 0, NULL }
+};
+static struct category_description main_categories[] = {
+       { CAT_mainporcelain, N_("Main Porcelain Commands") },
+       { CAT_ancillarymanipulators, N_("Ancillary Commands / Manipulators") },
+       { CAT_ancillaryinterrogators, N_("Ancillary Commands / Interrogators") },
+       { CAT_foreignscminterface, N_("Interacting with Others") },
+       { CAT_plumbingmanipulators, N_("Low-level Commands / Manipulators") },
+       { CAT_plumbinginterrogators, N_("Low-level Commands / Interrogators") },
+       { CAT_synchingrepositories, N_("Low-level Commands / Synching Repositories") },
+       { CAT_purehelpers, N_("Low-level Commands / Internal Helpers") },
+       { 0, NULL }
+};
+
+static const char *drop_prefix(const char *name, uint32_t category)
+{
+       const char *new_name;
+
+       if (skip_prefix(name, "git-", &new_name))
+               return new_name;
+       if (category == CAT_guide && skip_prefix(name, "git", &new_name))
+               return new_name;
+       return name;
+
+}
+
+static void extract_cmds(struct cmdname_help **p_cmds, uint32_t mask)
+{
+       int i, nr = 0;
+       struct cmdname_help *cmds;
+
+       if (ARRAY_SIZE(command_list) == 0)
+               BUG("empty command_list[] is a sign of broken generate-cmdlist.sh");
+
+       ALLOC_ARRAY(cmds, ARRAY_SIZE(command_list) + 1);
+
+       for (i = 0; i < ARRAY_SIZE(command_list); i++) {
+               const struct cmdname_help *cmd = command_list + i;
+
+               if (!(cmd->category & mask))
+                       continue;
+
+               cmds[nr] = *cmd;
+               cmds[nr].name = drop_prefix(cmd->name, cmd->category);
+
+               nr++;
+       }
+       cmds[nr].name = NULL;
+       *p_cmds = cmds;
+}
+
+static void print_command_list(const struct cmdname_help *cmds,
+                              uint32_t mask, int longest)
+{
+       int i;
+
+       for (i = 0; cmds[i].name; i++) {
+               if (cmds[i].category & mask) {
+                       size_t len = strlen(cmds[i].name);
+                       printf("   %s   ", cmds[i].name);
+                       if (longest > len)
+                               mput_char(' ', longest - len);
+                       puts(_(cmds[i].help));
+               }
+       }
+}
+
+static int cmd_name_cmp(const void *elem1, const void *elem2)
+{
+       const struct cmdname_help *e1 = elem1;
+       const struct cmdname_help *e2 = elem2;
+
+       return strcmp(e1->name, e2->name);
+}
+
+static void print_cmd_by_category(const struct category_description *catdesc,
+                                 int *longest_p)
+{
+       struct cmdname_help *cmds;
+       int longest = 0;
+       int i, nr = 0;
+       uint32_t mask = 0;
+
+       for (i = 0; catdesc[i].desc; i++)
+               mask |= catdesc[i].category;
+
+       extract_cmds(&cmds, mask);
+
+       for (i = 0; cmds[i].name; i++, nr++) {
+               if (longest < strlen(cmds[i].name))
+                       longest = strlen(cmds[i].name);
+       }
+       QSORT(cmds, nr, cmd_name_cmp);
+
+       for (i = 0; catdesc[i].desc; i++) {
+               uint32_t mask = catdesc[i].category;
+               const char *desc = catdesc[i].desc;
+
+               printf("\n%s\n", _(desc));
+               print_command_list(cmds, mask, longest);
+       }
+       free(cmds);
+       if (longest_p)
+               *longest_p = longest;
+}
+
 void add_cmdname(struct cmdnames *cmds, const char *name, int len)
 {
        struct cmdname *ent;
@@ -190,42 +309,245 @@ void list_commands(unsigned int colopts,
        }
 }
 
-static int cmd_group_cmp(const void *elem1, const void *elem2)
+void list_common_cmds_help(void)
 {
-       const struct cmdname_help *e1 = elem1;
-       const struct cmdname_help *e2 = elem2;
+       puts(_("These are common Git commands used in various situations:"));
+       print_cmd_by_category(common_categories, NULL);
+}
 
-       if (e1->group < e2->group)
-               return -1;
-       if (e1->group > e2->group)
-               return 1;
-       return strcmp(e1->name, e2->name);
+void list_all_main_cmds(struct string_list *list)
+{
+       struct cmdnames main_cmds, other_cmds;
+       int i;
+
+       memset(&main_cmds, 0, sizeof(main_cmds));
+       memset(&other_cmds, 0, sizeof(other_cmds));
+       load_command_list("git-", &main_cmds, &other_cmds);
+
+       for (i = 0; i < main_cmds.cnt; i++)
+               string_list_append(list, main_cmds.names[i]->name);
+
+       clean_cmdnames(&main_cmds);
+       clean_cmdnames(&other_cmds);
 }
 
-void list_common_cmds_help(void)
+void list_all_other_cmds(struct string_list *list)
+{
+       struct cmdnames main_cmds, other_cmds;
+       int i;
+
+       memset(&main_cmds, 0, sizeof(main_cmds));
+       memset(&other_cmds, 0, sizeof(other_cmds));
+       load_command_list("git-", &main_cmds, &other_cmds);
+
+       for (i = 0; i < other_cmds.cnt; i++)
+               string_list_append(list, other_cmds.names[i]->name);
+
+       clean_cmdnames(&main_cmds);
+       clean_cmdnames(&other_cmds);
+}
+
+void list_cmds_by_category(struct string_list *list,
+                          const char *cat)
 {
-       int i, longest = 0;
-       int current_grp = -1;
+       int i, n = ARRAY_SIZE(command_list);
+       uint32_t cat_id = 0;
 
-       for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
-               if (longest < strlen(common_cmds[i].name))
-                       longest = strlen(common_cmds[i].name);
+       for (i = 0; category_names[i]; i++) {
+               if (!strcmp(cat, category_names[i])) {
+                       cat_id = 1UL << i;
+                       break;
+               }
        }
+       if (!cat_id)
+               die(_("unsupported command listing type '%s'"), cat);
 
-       QSORT(common_cmds, ARRAY_SIZE(common_cmds), cmd_group_cmp);
+       for (i = 0; i < n; i++) {
+               struct cmdname_help *cmd = command_list + i;
 
-       puts(_("These are common Git commands used in various situations:"));
+               if (!(cmd->category & cat_id))
+                       continue;
+               string_list_append(list, drop_prefix(cmd->name, cmd->category));
+       }
+}
+
+void list_cmds_by_config(struct string_list *list)
+{
+       const char *cmd_list;
+
+       /*
+        * There's no actual repository setup at this point (and even
+        * if there is, we don't really care; only global config
+        * matters). If we accidentally set up a repository, it's ok
+        * too since the caller (git --list-cmds=) should exit shortly
+        * anyway.
+        */
+       if (git_config_get_string_const("completion.commands", &cmd_list))
+               return;
+
+       string_list_sort(list);
+       string_list_remove_duplicates(list, 0);
+
+       while (*cmd_list) {
+               struct strbuf sb = STRBUF_INIT;
+               const char *p = strchrnul(cmd_list, ' ');
+
+               strbuf_add(&sb, cmd_list, p - cmd_list);
+               if (*cmd_list == '-')
+                       string_list_remove(list, cmd_list + 1, 0);
+               else
+                       string_list_insert(list, sb.buf);
+               strbuf_release(&sb);
+               while (*p == ' ')
+                       p++;
+               cmd_list = p;
+       }
+}
+
+void list_common_guides_help(void)
+{
+       struct category_description catdesc[] = {
+               { CAT_guide, N_("The common Git guides are:") },
+               { 0, NULL }
+       };
+       print_cmd_by_category(catdesc, NULL);
+       putchar('\n');
+}
+
+struct slot_expansion {
+       const char *prefix;
+       const char *placeholder;
+       void (*fn)(struct string_list *list, const char *prefix);
+       int found;
+};
+
+void list_config_help(int for_human)
+{
+       struct slot_expansion slot_expansions[] = {
+               { "advice", "*", list_config_advices },
+               { "color.branch", "<slot>", list_config_color_branch_slots },
+               { "color.decorate", "<slot>", list_config_color_decorate_slots },
+               { "color.diff", "<slot>", list_config_color_diff_slots },
+               { "color.grep", "<slot>", list_config_color_grep_slots },
+               { "color.interactive", "<slot>", list_config_color_interactive_slots },
+               { "color.remote", "<slot>", list_config_color_sideband_slots },
+               { "color.status", "<slot>", list_config_color_status_slots },
+               { "fsck", "<msg-id>", list_config_fsck_msg_ids },
+               { "receive.fsck", "<msg-id>", list_config_fsck_msg_ids },
+               { NULL, NULL, NULL }
+       };
+       const char **p;
+       struct slot_expansion *e;
+       struct string_list keys = STRING_LIST_INIT_DUP;
+       int i;
 
-       for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
-               if (common_cmds[i].group != current_grp) {
-                       printf("\n%s\n", _(common_cmd_groups[common_cmds[i].group]));
-                       current_grp = common_cmds[i].group;
+       for (p = config_name_list; *p; p++) {
+               const char *var = *p;
+               struct strbuf sb = STRBUF_INIT;
+
+               for (e = slot_expansions; e->prefix; e++) {
+
+                       strbuf_reset(&sb);
+                       strbuf_addf(&sb, "%s.%s", e->prefix, e->placeholder);
+                       if (!strcasecmp(var, sb.buf)) {
+                               e->fn(&keys, e->prefix);
+                               e->found++;
+                               break;
+                       }
+               }
+               strbuf_release(&sb);
+               if (!e->prefix)
+                       string_list_append(&keys, var);
+       }
+
+       for (e = slot_expansions; e->prefix; e++)
+               if (!e->found)
+                       BUG("slot_expansion %s.%s is not used",
+                           e->prefix, e->placeholder);
+
+       string_list_sort(&keys);
+       for (i = 0; i < keys.nr; i++) {
+               const char *var = keys.items[i].string;
+               const char *wildcard, *tag, *cut;
+
+               if (for_human) {
+                       puts(var);
+                       continue;
+               }
+
+               wildcard = strchr(var, '*');
+               tag = strchr(var, '<');
+
+               if (!wildcard && !tag) {
+                       puts(var);
+                       continue;
                }
 
-               printf("   %s   ", common_cmds[i].name);
-               mput_char(' ', longest - strlen(common_cmds[i].name));
-               puts(_(common_cmds[i].help));
+               if (wildcard && !tag)
+                       cut = wildcard;
+               else if (!wildcard && tag)
+                       cut = tag;
+               else
+                       cut = wildcard < tag ? wildcard : tag;
+
+               /*
+                * We may produce duplicates, but that's up to
+                * git-completion.bash to handle
+                */
+               printf("%.*s\n", (int)(cut - var), var);
+       }
+       string_list_clear(&keys, 0);
+}
+
+static int get_alias(const char *var, const char *value, void *data)
+{
+       struct string_list *list = data;
+
+       if (skip_prefix(var, "alias.", &var))
+               string_list_append(list, var)->util = xstrdup(value);
+
+       return 0;
+}
+
+void list_all_cmds_help(void)
+{
+       struct string_list others = STRING_LIST_INIT_DUP;
+       struct string_list alias_list = STRING_LIST_INIT_DUP;
+       struct cmdname_help *aliases;
+       int i, longest;
+
+       printf_ln(_("See 'git help <command>' to read about a specific subcommand"));
+       print_cmd_by_category(main_categories, &longest);
+
+       list_all_other_cmds(&others);
+       if (others.nr)
+               printf("\n%s\n", _("External commands"));
+       for (i = 0; i < others.nr; i++)
+               printf("   %s\n", others.items[i].string);
+       string_list_clear(&others, 0);
+
+       git_config(get_alias, &alias_list);
+       string_list_sort(&alias_list);
+
+       for (i = 0; i < alias_list.nr; i++) {
+               size_t len = strlen(alias_list.items[i].string);
+               if (longest < len)
+                       longest = len;
        }
+
+       if (alias_list.nr) {
+               printf("\n%s\n", _("Command aliases"));
+               ALLOC_ARRAY(aliases, alias_list.nr + 1);
+               for (i = 0; i < alias_list.nr; i++) {
+                       aliases[i].name = alias_list.items[i].string;
+                       aliases[i].help = alias_list.items[i].util;
+                       aliases[i].category = 1;
+               }
+               aliases[alias_list.nr].name = NULL;
+               print_command_list(aliases, 1, longest);
+               free(aliases);
+       }
+       string_list_clear(&alias_list, 1);
 }
 
 int is_in_cmdlist(struct cmdnames *c, const char *s)
@@ -285,6 +607,7 @@ const char *help_unknown_cmd(const char *cmd)
 {
        int i, n, best_similarity = 0;
        struct cmdnames main_cmds, other_cmds;
+       struct cmdname_help *common_cmds;
 
        memset(&main_cmds, 0, sizeof(main_cmds));
        memset(&other_cmds, 0, sizeof(other_cmds));
@@ -299,6 +622,8 @@ const char *help_unknown_cmd(const char *cmd)
        QSORT(main_cmds.names, main_cmds.cnt, cmdname_compare);
        uniq(&main_cmds);
 
+       extract_cmds(&common_cmds, common_mask);
+
        /* This abuses cmdname->len for levenshtein distance */
        for (i = 0, n = 0; i < main_cmds.cnt; i++) {
                int cmp = 0; /* avoid compiler stupidity */
@@ -313,10 +638,10 @@ const char *help_unknown_cmd(const char *cmd)
                        die(_(bad_interpreter_advice), cmd, cmd);
 
                /* Does the candidate appear in common_cmds list? */
-               while (n < ARRAY_SIZE(common_cmds) &&
+               while (common_cmds[n].name &&
                       (cmp = strcmp(common_cmds[n].name, candidate)) < 0)
                        n++;
-               if ((n < ARRAY_SIZE(common_cmds)) && !cmp) {
+               if (common_cmds[n].name && !cmp) {
                        /* Yes, this is one of the common commands */
                        n++; /* use the entry from common_cmds[] */
                        if (starts_with(candidate, cmd)) {
@@ -329,6 +654,7 @@ const char *help_unknown_cmd(const char *cmd)
                main_cmds.names[i]->len =
                        levenshtein(cmd, candidate, 0, 2, 1, 3) + 1;
        }
+       FREE_AND_NULL(common_cmds);
 
        QSORT(main_cmds.names, main_cmds.cnt, levenshtein_compare);
 
@@ -419,6 +745,7 @@ int cmd_version(int argc, const char **argv, const char *prefix)
                else
                        printf("no commit associated with this build\n");
                printf("sizeof-long: %d\n", (int)sizeof(long));
+               printf("sizeof-size_t: %d\n", (int)sizeof(size_t));
                /* NEEDSWORK: also save and output GIT-BUILD_OPTIONS? */
        }
        return 0;