Git had previously been using the $PATH for scripts--a previous
patch moved exec'ed commands to also use the $PATH. For consistency
"help -a" should also list commands in the $PATH.
The main commands are still listed from the git_exec_path(), but
the $PATH is walked and other git commands (probably extensions) are
listed.
Signed-off-by: Scott R Parish <srp@xxxxxxxxxxxx>
---
help.c | 163 +++++++++++++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 125 insertions(+), 38 deletions(-)
diff --git a/help.c b/help.c
index 34ac5db..07cf67a 100644
--- a/help.c
+++ b/help.c
@@ -37,24 +37,28 @@ static inline void mput_char(char c, unsigned int num)
putchar(c);
}
-static struct cmdname {
- size_t len;
- char name[1];
-} **cmdname;
-static int cmdname_alloc, cmdname_cnt;
-
-static void add_cmdname(const char *name, int len)
+static struct cmdnames {
+ int alloc;
+ int cnt;
+ struct cmdname {
+ size_t len;
+ char name[1];
+ } **names;
+} main_cmds, other_cmds;
+
+static void add_cmdname(struct cmdnames *cmds, const char *name, int len)
{
struct cmdname *ent;
- if (cmdname_alloc <= cmdname_cnt) {
- cmdname_alloc = cmdname_alloc + 200;
- cmdname = xrealloc(cmdname, cmdname_alloc * sizeof(*cmdname));
+ if (cmds->alloc <= cmds->cnt) {
+ cmds->alloc = cmds->alloc + 200;
+ cmds->names = xrealloc(cmds->names,
+ cmds->alloc * sizeof(*cmds->names));
}
ent = xmalloc(sizeof(*ent) + len);
ent->len = len;
memcpy(ent->name, name, len);
ent->name[len] = 0;
- cmdname[cmdname_cnt++] = ent;
+ cmds->names[cmds->cnt++] = ent;
}
static int cmdname_compare(const void *a_, const void *b_)
@@ -64,7 +68,44 @@ static int cmdname_compare(const void *a_, const void *b_)
return strcmp(a->name, b->name);
}
-static void pretty_print_string_list(struct cmdname **cmdname, int longest)
+static void uniq(struct cmdnames *cmds)
+{
+ int i, j;
+
+ if (!cmds->cnt)
+ return;
+
+ for (i = j = 1; i < cmds->cnt; i++) {
+ if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name)) {
+ cmds->names[j++] = cmds->names[i];
+ }
+ }
+
+ cmds->cnt = j;
+}
+
+static void subtract_cmds(struct cmdnames *a, struct cmdnames *b) {
+ int ai, aj, bi;
+ int cmp;
+
+ ai = aj = bi = 0;
+ while (ai < a->cnt && bi < b->cnt) {
+ cmp = strcmp(a->names[ai]->name, b->names[bi]->name);
+ if (cmp < 0)
+ a->names[aj++] = a->names[ai++];
+ else if (cmp == 0)
+ ai++, bi++;
+ else if (cmp > 0)
+ bi++;
+ }
+
+ while (ai < a->cnt)
+ a->names[aj++] = a->names[ai++];
+
+ a->cnt = aj;
+}
+
+static void pretty_print_string_list(struct cmdnames *cmds, int longest)
{
int cols = 1, rows;
int space = longest + 1; /* min 1 SP between words */
@@ -73,9 +114,7 @@ static void pretty_print_string_list(struct cmdname **cmdname, int longest)
if (space < max_cols)
cols = max_cols / space;
- rows = (cmdname_cnt + cols - 1) / cols;
-
- qsort(cmdname, cmdname_cnt, sizeof(*cmdname), cmdname_compare);
+ rows = (cmds->cnt + cols - 1) / cols;
for (i = 0; i < rows; i++) {
printf(" ");
@@ -83,31 +122,29 @@ static void pretty_print_string_list(struct cmdname **cmdname, int longest)
for (j = 0; j < cols; j++) {
int n = j * rows + i;
int size = space;
- if (n >= cmdname_cnt)
+ if (n >= cmds->cnt)
break;
- if (j == cols-1 || n + rows >= cmdname_cnt)
+ if (j == cols-1 || n + rows >= cmds->cnt)
size = 1;
- printf("%-*s", size, cmdname[n]->name);
+ printf("%-*s", size, cmds->names[n]->name);
}
putchar('\n');
}
}
-static void list_commands(const char *exec_path)
+static unsigned int list_commands_in_dir(struct cmdnames *cmds, const char *dir)
{
unsigned int longest = 0;
const char *prefix = "git-";
int prefix_len = strlen(prefix);
- DIR *dir = opendir(exec_path);
+ DIR *dirp = opendir(dir);
struct dirent *de;
+ struct stat st;
- if (!dir || chdir(exec_path)) {
- fprintf(stderr, "git: '%s': %s\n", exec_path, strerror(errno));
- exit(1);
- }
+ if (!dirp || chdir(dir))
+ return 0;
- while ((de = readdir(dir)) != NULL) {
- struct stat st;
+ while ((de = readdir(dirp)) != NULL) {
int entlen;
if (prefixcmp(de->d_name, prefix))
@@ -125,16 +162,68 @@ static void list_commands(const char *exec_path)
if (longest < entlen)
longest = entlen;
- add_cmdname(de->d_name + prefix_len, entlen);
+ add_cmdname(cmds, de->d_name + prefix_len, entlen);
+ }
+ closedir(dirp);
+
+ return longest;
+}
+
+static void list_commands(void)
+{
+ unsigned int longest = 0;
+ unsigned int len;
+ const char *env_path = getenv("PATH");
+ char *paths, *path, *colon;
+ const char *exec_path = git_exec_path();
+
+ if (exec_path)
+ longest = list_commands_in_dir(&main_cmds, exec_path);
+
+ if (!env_path) {
+ fprintf(stderr, "PATH not set\n");
+ exit(1);
+ }
+
+ path = paths = xstrdup(env_path);
+ while (1) {
+ if ((colon = strchr(path, ':')))
+ *colon = 0;
+
+ len = list_commands_in_dir(&other_cmds, path);
+ if (len > longest)
+ longest = len;
+
+ if (!colon)
+ break;
+ path = colon + 1;
+ }
+ free(paths);
+
+ qsort(main_cmds.names, main_cmds.cnt,
+ sizeof(*main_cmds.names), cmdname_compare);
+ uniq(&main_cmds);
+
+ qsort(other_cmds.names, other_cmds.cnt,
+ sizeof(*other_cmds.names), cmdname_compare);
+ uniq(&other_cmds);
+ subtract_cmds(&other_cmds, &main_cmds);
+
+ if (main_cmds.cnt) {
+ printf("available git commands in '%s'\n", exec_path);
+ printf("----------------------------");
+ mput_char('-', strlen(exec_path));
+ putchar('\n');
+ pretty_print_string_list(&main_cmds, longest);
+ putchar('\n');
+ }
+
+ if (other_cmds.cnt) {
+ printf("git commands available from elsewhere on your $PATH\n");
+ printf("---------------------------------------------------\n");
+ pretty_print_string_list(&other_cmds, longest);
+ putchar('\n');
}
- closedir(dir);
-
- printf("git commands available in '%s'\n", exec_path);
- printf("----------------------------");
- mput_char('-', strlen(exec_path));
- putchar('\n');
- pretty_print_string_list(cmdname, longest);
- putchar('\n');
}
void list_common_cmds_help(void)
@@ -188,7 +277,6 @@ int cmd_version(int argc, const char **argv, const char *prefix)
int cmd_help(int argc, const char **argv, const char *prefix)
{
const char *help_cmd = argc > 1 ? argv[1] : NULL;
- const char *exec_path = git_exec_path();
if (!help_cmd) {
printf("usage: %s\n\n", git_usage_string);
@@ -198,8 +286,7 @@ int cmd_help(int argc, const char **argv, const char *prefix)
else if (!strcmp(help_cmd, "--all") || !strcmp(help_cmd, "-a")) {
printf("usage: %s\n\n", git_usage_string);
- if(exec_path)
- list_commands(exec_path);
+ list_commands();
exit(0);
}
--
1.5.3.4.401.g19778-dirty
-
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