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help: do not expect built-in commands to be hardlinked

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When building with SKIP_DASHED_BUILT_INS=YesPlease, the built-in
commands are no longer present in the `PATH` as hardlinks to `git`.

As a consequence, `load_command_list()` needs to be taught to find the
names of the built-in commands from elsewhere.

This only affected the output of `git --list-cmds=main`, but not the
output of `git help -a` because the latter includes the built-in
commands by virtue of them being listed in command-list.txt.

The bug was detected via a patch series that turns the merge strategies
included in Git into built-in commands: `git merge -s help` relies on
`load_command_list()` to determine the list of available merge
strategies.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2020-10-07 21:56:51 +00:00 committed by Junio C Hamano
parent ef60e9f74b
commit 722fc37491
3 changed files with 22 additions and 0 deletions
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19
git.c
View File

@ -637,6 +637,25 @@ static void list_builtins(struct string_list *out, unsigned int exclude_option)
}
}
void load_builtin_commands(const char *prefix, struct cmdnames *cmds)
{
const char *name;
int i;
/*
* Callers can ask for a subset of the commands based on a certain
* prefix, which is then dropped from the added names. The names in
* the `commands[]` array do not have the `git-` prefix, though,
* therefore we must expect the `prefix` to at least start with `git-`.
*/
if (!skip_prefix(prefix, "git-", &prefix))
BUG("prefix '%s' must start with 'git-'", prefix);
for (i = 0; i < ARRAY_SIZE(commands); i++)
if (skip_prefix(commands[i].cmd, prefix, &name))
add_cmdname(cmds, name, strlen(name));
}
#ifdef STRIP_EXTENSION
static void strip_extension(const char **argv)
{

2
help.c
View File

@ -263,6 +263,8 @@ void load_command_list(const char *prefix,
const char *env_path = getenv("PATH");
const char *exec_path = git_exec_path();
load_builtin_commands(prefix, main_cmds);
if (exec_path) {
list_commands_in_dir(main_cmds, exec_path, prefix);
QSORT(main_cmds->names, main_cmds->cnt, cmdname_compare);

1
help.h
View File

@ -32,6 +32,7 @@ const char *help_unknown_cmd(const char *cmd);
void load_command_list(const char *prefix,
struct cmdnames *main_cmds,
struct cmdnames *other_cmds);
void load_builtin_commands(const char *prefix, struct cmdnames *cmds);
void add_cmdname(struct cmdnames *cmds, const char *name, int len);
/* Here we require that excludes is a sorted list. */
void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes);