git/alias.c
Nguyễn Thái Ngọc Duy 3301d36b29 completion: add and use --list-cmds=alias
By providing aliases via --list-cmds=, we could simplify command
collection code in the script. We only issue one git command. Before
this patch that is "git config", after it's "git --list-cmds=". In
"git help" completion case we actually reduce one "git" process (for
getting guides) but that call was added in this series so it does not
really count.

A couple of bash functions are removed because they are not needed
anymore. __git_compute_all_commands() and $__git_all_commands stay
because they are still needed for completing pager.* config and
without "alias" group, the result is still cacheable.

There is a slight (good) change in _git_help() with this patch: before
"git help <tab>" shows external commands (as in _not_ part of git) as
well as part of $__git_all_commands. We have finer control over
command listing now and can exclude that because we can't provide a
man page for external commands anyway.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 13:23:14 +09:00

109 lines
2.1 KiB
C

#include "cache.h"
#include "alias.h"
#include "config.h"
#include "string-list.h"
struct config_alias_data {
const char *alias;
char *v;
struct string_list *list;
};
static int config_alias_cb(const char *key, const char *value, void *d)
{
struct config_alias_data *data = d;
const char *p;
if (!skip_prefix(key, "alias.", &p))
return 0;
if (data->alias) {
if (!strcasecmp(p, data->alias))
return git_config_string((const char **)&data->v,
key, value);
} else if (data->list) {
string_list_append(data->list, p);
}
return 0;
}
char *alias_lookup(const char *alias)
{
struct config_alias_data data = { alias, NULL };
read_early_config(config_alias_cb, &data);
return data.v;
}
void list_aliases(struct string_list *list)
{
struct config_alias_data data = { NULL, NULL, list };
read_early_config(config_alias_cb, &data);
}
#define SPLIT_CMDLINE_BAD_ENDING 1
#define SPLIT_CMDLINE_UNCLOSED_QUOTE 2
static const char *split_cmdline_errors[] = {
"cmdline ends with \\",
"unclosed quote"
};
int split_cmdline(char *cmdline, const char ***argv)
{
int src, dst, count = 0, size = 16;
char quoted = 0;
ALLOC_ARRAY(*argv, size);
/* split alias_string */
(*argv)[count++] = cmdline;
for (src = dst = 0; cmdline[src];) {
char c = cmdline[src];
if (!quoted && isspace(c)) {
cmdline[dst++] = 0;
while (cmdline[++src]
&& isspace(cmdline[src]))
; /* skip */
ALLOC_GROW(*argv, count + 1, size);
(*argv)[count++] = cmdline + dst;
} else if (!quoted && (c == '\'' || c == '"')) {
quoted = c;
src++;
} else if (c == quoted) {
quoted = 0;
src++;
} else {
if (c == '\\' && quoted != '\'') {
src++;
c = cmdline[src];
if (!c) {
FREE_AND_NULL(*argv);
return -SPLIT_CMDLINE_BAD_ENDING;
}
}
cmdline[dst++] = c;
src++;
}
}
cmdline[dst] = 0;
if (quoted) {
FREE_AND_NULL(*argv);
return -SPLIT_CMDLINE_UNCLOSED_QUOTE;
}
ALLOC_GROW(*argv, count + 1, size);
(*argv)[count] = NULL;
return count;
}
const char *split_cmdline_strerror(int split_cmdline_errno)
{
return split_cmdline_errors[-split_cmdline_errno - 1];
}