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74703a1e4d
Most of the submodule operations work on a set of submodules.
Calculating and using this set is usually done via:
module_list "$@" | {
while read mode sha1 stage sm_path
do
# the actual operation
done
}
Currently the function `module_list` is implemented in the
git-submodule.sh as a shell script wrapping a perl script.
The rewrite is in C, such that it is faster and can later be
easily adapted when other functions are rewritten in C.
git-submodule.sh, similar to the builtin commands, will navigate
to the top-most directory of the repository and keep the
subdirectory as a variable. As the helper is called from
within the git-submodule.sh script, we are already navigated
to the root level, but the path arguments are still relative
to the subdirectory we were in when calling git-submodule.sh.
That's why there is a `--prefix` option pointing to an alternative
path which to anchor relative path arguments.
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "parse-options.h"
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#include "quote.h"
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#include "pathspec.h"
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#include "dir.h"
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#include "utf8.h"
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struct module_list {
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const struct cache_entry **entries;
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int alloc, nr;
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};
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#define MODULE_LIST_INIT { NULL, 0, 0 }
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static int module_list_compute(int argc, const char **argv,
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const char *prefix,
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struct pathspec *pathspec,
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struct module_list *list)
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{
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int i, result = 0;
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char *max_prefix, *ps_matched = NULL;
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int max_prefix_len;
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parse_pathspec(pathspec, 0,
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PATHSPEC_PREFER_FULL |
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PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
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prefix, argv);
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/* Find common prefix for all pathspec's */
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max_prefix = common_prefix(pathspec);
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max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
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if (pathspec->nr)
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ps_matched = xcalloc(pathspec->nr, 1);
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if (read_cache() < 0)
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die(_("index file corrupt"));
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for (i = 0; i < active_nr; i++) {
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const struct cache_entry *ce = active_cache[i];
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if (!S_ISGITLINK(ce->ce_mode) ||
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!match_pathspec(pathspec, ce->name, ce_namelen(ce),
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max_prefix_len, ps_matched, 1))
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continue;
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ALLOC_GROW(list->entries, list->nr + 1, list->alloc);
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list->entries[list->nr++] = ce;
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while (i + 1 < active_nr &&
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!strcmp(ce->name, active_cache[i + 1]->name))
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/*
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* Skip entries with the same name in different stages
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* to make sure an entry is returned only once.
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*/
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i++;
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}
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free(max_prefix);
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if (ps_matched && report_path_error(ps_matched, pathspec, prefix))
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result = -1;
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free(ps_matched);
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return result;
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}
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static int module_list(int argc, const char **argv, const char *prefix)
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{
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int i;
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struct pathspec pathspec;
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struct module_list list = MODULE_LIST_INIT;
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struct option module_list_options[] = {
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OPT_STRING(0, "prefix", &prefix,
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N_("path"),
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N_("alternative anchor for relative paths")),
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OPT_END()
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};
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const char *const git_submodule_helper_usage[] = {
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N_("git submodule--helper list [--prefix=<path>] [<path>...]"),
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NULL
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};
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argc = parse_options(argc, argv, prefix, module_list_options,
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git_submodule_helper_usage, 0);
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if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0) {
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printf("#unmatched\n");
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return 1;
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}
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for (i = 0; i < list.nr; i++) {
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const struct cache_entry *ce = list.entries[i];
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if (ce_stage(ce))
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printf("%06o %s U\t", ce->ce_mode, sha1_to_hex(null_sha1));
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else
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printf("%06o %s %d\t", ce->ce_mode, sha1_to_hex(ce->sha1), ce_stage(ce));
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utf8_fprintf(stdout, "%s\n", ce->name);
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}
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return 0;
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}
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struct cmd_struct {
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const char *cmd;
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int (*fn)(int, const char **, const char *);
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};
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static struct cmd_struct commands[] = {
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{"list", module_list},
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};
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int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
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{
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int i;
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if (argc < 2)
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die(_("fatal: submodule--helper subcommand must be "
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"called with a subcommand"));
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for (i = 0; i < ARRAY_SIZE(commands); i++)
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if (!strcmp(argv[1], commands[i].cmd))
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return commands[i].fn(argc - 1, argv + 1, prefix);
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die(_("fatal: '%s' is not a valid submodule--helper "
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"subcommand"), argv[1]);
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}
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