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builtin-merge: allow using a custom strategy

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Allow using a custom strategy, as long as it's named git-merge-foo. The
error handling is now done using is_git_command(). The list of available
strategies is now shown by list_commands().

If an invalid strategy is supplied, like -s foobar, then git-merge would
list all git-merge-* commands. This is not perfect, since for example
git-merge-index is not a valid strategy.

These are removed from the output by scanning the list of main commands;
if the git-merge-foo command is listed in the all_strategy list, then
it's shown, otherwise excluded. This does not exclude commands somewhere
else in the PATH, where custom strategies are expected.

Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Miklos Vajna 2008-07-30 01:16:59 +02:00 committed by Junio C Hamano
parent 940208a771
commit 87091b495e
1 changed files with 35 additions and 7 deletions
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42
builtin-merge.c
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@ -22,6 +22,7 @@
#include "log-tree.h"
#include "color.h"
#include "rerere.h"
#include "help.h"
#define DEFAULT_TWOHEAD (1<<0)
#define DEFAULT_OCTOPUS (1<<1)
@ -77,7 +78,9 @@ static int option_parse_message(const struct option *opt,
static struct strategy *get_strategy(const char *name)
{
int i;
struct strbuf err;
struct strategy *ret;
static struct cmdnames main_cmds, other_cmds;
static int longest;
if (!name)
return NULL;
@ -86,12 +89,37 @@ static struct strategy *get_strategy(const char *name)
if (!strcmp(name, all_strategy[i].name))
return &all_strategy[i];
strbuf_init(&err, 0);
for (i = 0; i < ARRAY_SIZE(all_strategy); i++)
strbuf_addf(&err, " %s", all_strategy[i].name);
fprintf(stderr, "Could not find merge strategy '%s'.\n", name);
fprintf(stderr, "Available strategies are:%s.\n", err.buf);
exit(1);
if (!longest) {
struct cmdnames not_strategies;
memset(&main_cmds, 0, sizeof(struct cmdnames));
memset(&other_cmds, 0, sizeof(struct cmdnames));
memset(&not_strategies, 0, sizeof(struct cmdnames));
longest = load_command_list("git-merge-", &main_cmds,
&other_cmds);
for (i = 0; i < main_cmds.cnt; i++) {
int j, found = 0;
struct cmdname *ent = main_cmds.names[i];
for (j = 0; j < ARRAY_SIZE(all_strategy); j++)
if (!strncmp(ent->name, all_strategy[j].name, ent->len)
&& !all_strategy[j].name[ent->len])
found = 1;
if (!found)
add_cmdname(&not_strategies, ent->name, ent->len);
exclude_cmds(&main_cmds, &not_strategies);
}
}
if (!is_in_cmdlist(&main_cmds, name) && !is_in_cmdlist(&other_cmds, name)) {
fprintf(stderr, "Could not find merge strategy '%s'.\n\n", name);
list_commands("strategies", longest, &main_cmds, &other_cmds);
exit(1);
}
ret = xmalloc(sizeof(struct strategy));
memset(ret, 0, sizeof(struct strategy));
ret->name = xstrdup(name);
return ret;
}
static void append_strategy(struct strategy *s)