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convert: split start_multi_file_filter() into two separate functions 

To enable future reuse of the filter.<driver>.process infrastructure,
split start_multi_file_filter() into two separate parts.

start_multi_file_filter() will now only contain the generic logic to
manage the creation and tracking of the child process in a hashmap.

start_multi_file_filter_fn() is a protocol specific initialization
function that will negotiate the multi-file-filter interface version
and capabilities.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ben Peart 2017-05-05 11:27:57 -04:00 committed by Junio C Hamano
parent 7e936842f5
commit a810ea9945
1 changed files with 34 additions and 24 deletions
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58
convert.c
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@ -565,35 +565,14 @@ static void stop_multi_file_filter(struct child_process *process)
finish_command(process);
}
static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, const char *cmd)
static int start_multi_file_filter_fn(struct cmd2process *entry)
{
int err;
struct cmd2process *entry;
struct child_process *process;
const char *argv[] = { cmd, NULL };
struct string_list cap_list = STRING_LIST_INIT_NODUP;
char *cap_buf;
const char *cap_name;
entry = xmalloc(sizeof(*entry));
entry->cmd = cmd;
entry->supported_capabilities = 0;
process = &entry->process;
child_process_init(process);
process->argv = argv;
process->use_shell = 1;
process->in = -1;
process->out = -1;
process->clean_on_exit = 1;
process->clean_on_exit_handler = stop_multi_file_filter;
if (start_command(process)) {
error("cannot fork to run external filter '%s'", cmd);
return NULL;
}
hashmap_entry_init(entry, strhash(cmd));
struct child_process *process = &entry->process;
const char *cmd = entry->cmd;
sigchain_push(SIGPIPE, SIG_IGN);
@ -642,6 +621,37 @@ static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, cons
done:
sigchain_pop(SIGPIPE);
return err;
}
static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, const char *cmd)
{
int err;
struct cmd2process *entry;
struct child_process *process;
const char *argv[] = { cmd, NULL };
entry = xmalloc(sizeof(*entry));
entry->cmd = cmd;
entry->supported_capabilities = 0;
process = &entry->process;
child_process_init(process);
process->argv = argv;
process->use_shell = 1;
process->in = -1;
process->out = -1;
process->clean_on_exit = 1;
process->clean_on_exit_handler = stop_multi_file_filter;
if (start_command(process)) {
error("cannot fork to run external filter '%s'", cmd);
return NULL;
}
hashmap_entry_init(entry, strhash(cmd));
err = start_multi_file_filter_fn(entry);
if (err) {
error("initialization for external filter '%s' failed", cmd);
kill_multi_file_filter(hashmap, entry);