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/*
* libgit2 "ls-files" example - shows how to view all files currently in the index
*
* Written by the libgit2 contributors
*
* To the extent possible under law, the author(s) have dedicated all copyright
* and related and neighboring rights to this software to the public domain
* worldwide. This software is distributed without any warranty.
*
* You should have received a copy of the CC0 Public Domain Dedication along
* with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#include "common.h"
#include "array.h"
/**
* This example demonstrates the libgit2 index APIs to roughly
* simulate the output of `git ls-files`.
* `git ls-files` has many options and this currently does not show them.
*
* `git ls-files` base command shows all paths in the index at that time.
* This includes staged and committed files, but unstaged files will not display.
*
* This currently supports the default behavior and the `--error-unmatch` option.
*/
typedef struct {
int error_unmatch;
char *files[1024];
size_t file_count;
} ls_options;
static void usage(const char *message, const char *arg)
{
if (message && arg)
fprintf(stderr, "%s: %s\n", message, arg);
else if (message)
fprintf(stderr, "%s\n", message);
fprintf(stderr, "usage: ls-files [--error-unmatch] [--] [<file>...]\n");
exit(1);
}
static int parse_options(ls_options *opts, int argc, char *argv[])
{
int parsing_files = 0;
int i;
memset(opts, 0, sizeof(ls_options));
if (argc < 2)
return 0;
for (i = 1; i < argc; ++i) {
char *a = argv[i];
/* if it doesn't start with a '-' or is after the '--' then it is a file */
if (a[0] != '-' || parsing_files) {
parsing_files = 1;
/* watch for overflows (just in case) */
if (opts->file_count == 1024) {
fprintf(stderr, "ls-files can only support 1024 files at this time.\n");
return -1;
}
opts->files[opts->file_count++] = a;
} else if (!strcmp(a, "--")) {
parsing_files = 1;
} else if (!strcmp(a, "--error-unmatch")) {
opts->error_unmatch = 1;
} else {
usage("Unsupported argument", a);
return -1;
}
}
return 0;
}
static int print_paths(ls_options *opts, git_index *index)
{
size_t i;
const git_index_entry *entry;
/* if there are no files explicitly listed by the user print all entries in the index */
if (opts->file_count == 0) {
size_t entry_count = git_index_entrycount(index);
for (i = 0; i < entry_count; i++) {
entry = git_index_get_byindex(index, i);
puts(entry->path);
}
return 0;
}
/* loop through the files found in the args and print them if they exist */
for (i = 0; i < opts->file_count; ++i) {
const char *path = opts->files[i];
if ((entry = git_index_get_bypath(index, path, GIT_INDEX_STAGE_NORMAL)) != NULL) {
puts(path);
} else if (opts->error_unmatch) {
fprintf(stderr, "error: pathspec '%s' did not match any file(s) known to git.\n", path);
fprintf(stderr, "Did you forget to 'git add'?\n");
return -1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
ls_options opts;
git_repository *repo = NULL;
git_index *index = NULL;
int error;
if ((error = parse_options(&opts, argc, argv)) < 0)
return error;
git_libgit2_init();
if ((error = git_repository_open_ext(&repo, ".", 0, NULL)) < 0)
goto cleanup;
if ((error = git_repository_index(&index, repo)) < 0)
goto cleanup;
error = print_paths(&opts, index);
cleanup:
git_index_free(index);
git_repository_free(repo);
git_libgit2_shutdown();
return error;
}
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