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examples: ls-files: fix style and refactor

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This commit is contained in:
Carson Howard
2017-10-22 20:43:22 -07:00
committed by Carson Howard
parent 52d83dde97
commit cd39273dbb
1 changed files with 72 additions and 77 deletions
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149
examples/ls-files.c
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@@ -13,6 +13,7 @@
*/
#include "common.h"
#include "array.h"
/**
* This example demonstrates the libgit2 index APIs to roughly
@@ -31,19 +32,79 @@
*
*/
#define MAX_FILES 64
typedef struct ls_options {
typedef struct {
int error_unmatch;
char *files[MAX_FILES];
char **files;
int file_count;
} ls_options;
static void usage(const char *message, const char *arg);
void parse_options(ls_options *opts, int argc, char *argv[]);
int print_error_unmatch(ls_options *opts, git_index *index);
/* Print a usage message for the program. */
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);
}
int main(int argc, char *argv[]) {
static void parse_options(ls_options *opts, int argc, char *argv[])
{
int parsing_files = 0;
struct args_info args = ARGS_INFO_INIT;
git_array_t(char *) files = GIT_ARRAY_INIT;
memset(opts, 0, sizeof(ls_options));
if (argc < 2)
return;
for (args.pos = 1; args.pos < argc; ++args.pos) {
char *a = argv[args.pos];
/* if it doesn't start with a '-' or is after the '--' then it is a file */
if (a[0] != '-') {
parsing_files = 1;
opts->files = git_array_alloc(files);
GITERR_CHECK_ALLOC(opts->files);
opts->files[opts->file_count++] = a;
} else if (!strcmp(a, "--")) {
parsing_files = 1;
} else if (!strcmp(a, "--error-unmatch") && !parsing_files) {
opts->error_unmatch = 1;
} else {
usage("Unsupported argument", a);
}
}
}
static int print_paths(ls_options *opts, git_index *index)
{
int i;
const git_index_entry *entry;
/* 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];
entry = git_index_get_bypath(index, path, GIT_INDEX_STAGE_NORMAL);
if (!entry && opts->error_unmatch) {
printf("error: pathspec '%s' did not match any file(s) known to git.\n", path);
printf("Did you forget to 'git add'?\n");
return -1;
}
printf("%s\n", path);
}
return 0;
}
int main(int argc, char *argv[])
{
ls_options opts;
git_repository *repo;
git_index *index;
@@ -54,20 +115,17 @@ int main(int argc, char *argv[]) {
parse_options(&opts, argc, argv);
/* we need to initialize libgit2 */
git_libgit2_init();
/* we need to open the repo */
if ((error = git_repository_open_ext(&repo, ".", 0, NULL)) != 0)
goto cleanup;
/* we need to load the repo's index */
if ((error = git_repository_index(&index, repo)) != 0)
goto cleanup;
/* if the error_unmatch flag is set, we need to print it differently */
if (opts.error_unmatch) {
error = print_error_unmatch(&opts, index);
/* if there are files explicitly listed by the user, we need to treat this command differently */
if (opts.file_count > 0) {
error = print_paths(&opts, index);
goto cleanup;
}
@@ -84,70 +142,7 @@ cleanup:
/* free our allocated resources */
git_index_free(index);
git_repository_free(repo);
/* we need to shutdown libgit2 */
git_libgit2_shutdown();
return error;
}
/* Print a usage message for the program. */
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);
}
void parse_options(ls_options *opts, int argc, char *argv[]) {
int parsing_files = 0;
struct args_info args = ARGS_INFO_INIT;
memset(opts, 0, sizeof(ls_options));
opts->error_unmatch = 0;
opts->file_count = 0;
if (argc < 2)
return;
for (args.pos = 1; args.pos < argc; ++args.pos) {
char *a = argv[args.pos];
/* if it doesn't start with a '-' or is after the '--' then it is a file */
if (a[0] != '-' || !strcmp(a, "--")) {
if (parsing_files) {
opts->files[opts->file_count++] = a;
} else {
parsing_files = 1;
}
} else if (!strcmp(a, "--error-unmatch")) {
opts->error_unmatch = 1;
parsing_files = 1;
} else {
usage("Unsupported argument", a);
}
}
}
int print_error_unmatch(ls_options *opts, git_index *index) {
int i;
const git_index_entry *entry;
/* 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];
entry = git_index_get_bypath(index, path, GIT_INDEX_STAGE_NORMAL);
if (!entry) {
printf("error: pathspec '%s' did not match any file(s) known to git.\n", path);
printf("Did you forget to 'git add'?\n");
return -1;
}
printf("%s\n", path);
}
return 0;
}