Reorganize and doc-commentify blame sample.
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diff --git a/examples/blame.c b/examples/blame.c
index 9060fa1..182b577 100644
--- a/examples/blame.c
+++ b/examples/blame.c
@@ -19,104 +19,76 @@
* simulate the output of `git blame` and a few of its command line arguments.
*/
-static void usage(const char *msg, const char *arg);
+struct opts {
+ char *path;
+ char *commitspec;
+ int C;
+ int M;
+ int start_line;
+ int end_line;
+};
+static void parse_opts(struct opts *o, int argc, char *argv[]);
int main(int argc, char *argv[])
{
int i, line, break_on_null_hunk;
- const char *path = NULL, *a;
- const char *rawdata, *commitspec=NULL, *bare_args[3] = {0};
char spec[1024] = {0};
+ struct opts o = {0};
+ const char *rawdata;
git_repository *repo = NULL;
git_revspec revspec = {0};
- git_blame_options opts = GIT_BLAME_OPTIONS_INIT;
+ git_blame_options blameopts = GIT_BLAME_OPTIONS_INIT;
git_blame *blame = NULL;
git_blob *blob;
+ git_object *obj;
git_threads_init();
- if (argc < 2) usage(NULL, NULL);
-
- for (i=1; i<argc; i++) {
- a = argv[i];
+ parse_opts(&o, argc, argv);
+ if (o.M) blameopts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES;
+ if (o.C) blameopts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
- if (a[0] != '-') {
- int i=0;
- while (bare_args[i] && i < 3) ++i;
- if (i >= 3)
- usage("Invalid argument set", NULL);
- bare_args[i] = a;
- }
- else if (!strcmp(a, "--"))
- continue;
- else if (!strcasecmp(a, "-M"))
- opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES;
- else if (!strcasecmp(a, "-C"))
- opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
- else if (!strcasecmp(a, "-L")) {
- i++; a = argv[i];
- if (i >= argc) fatal("Not enough arguments to -L", NULL);
- check_lg2(sscanf(a, "%d,%d", &opts.min_line, &opts.max_line)-2, "-L format error", NULL);
- }
- else {
- /* commit range */
- if (commitspec) fatal("Only one commit spec allowed", NULL);
- commitspec = a;
- }
- }
-
- /* Handle the bare arguments */
- if (!bare_args[0]) usage("Please specify a path", NULL);
- path = bare_args[0];
- if (bare_args[1]) {
- /* <commitspec> <path> */
- path = bare_args[1];
- commitspec = bare_args[0];
- }
- if (bare_args[2]) {
- /* <oldcommit> <newcommit> <path> */
- path = bare_args[2];
- sprintf(spec, "%s..%s", bare_args[0], bare_args[1]);
- commitspec = spec;
- }
-
- /* Open the repo */
+ /** Open the repository. */
check_lg2(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository", NULL);
- /* Parse the end points */
- if (commitspec) {
- check_lg2(git_revparse(&revspec, repo, commitspec), "Couldn't parse commit spec", NULL);
+ /**
+ * The commit range comes in "commitish" form. Use the rev-parse API to
+ * nail down the end points.
+ */
+ if (o.commitspec) {
+ check_lg2(git_revparse(&revspec, repo, o.commitspec), "Couldn't parse commit spec", NULL);
if (revspec.flags & GIT_REVPARSE_SINGLE) {
- git_oid_cpy(&opts.newest_commit, git_object_id(revspec.from));
+ git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.from));
git_object_free(revspec.from);
} else {
- git_oid_cpy(&opts.oldest_commit, git_object_id(revspec.from));
- git_oid_cpy(&opts.newest_commit, git_object_id(revspec.to));
+ git_oid_cpy(&blameopts.oldest_commit, git_object_id(revspec.from));
+ git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.to));
git_object_free(revspec.from);
git_object_free(revspec.to);
}
}
- /* Run the blame */
- check_lg2(git_blame_file(&blame, repo, path, &opts), "Blame error", NULL);
+ /** Run the blame. */
+ check_lg2(git_blame_file(&blame, repo, o.path, &blameopts), "Blame error", NULL);
- /* Get the raw data for output */
- if (git_oid_iszero(&opts.newest_commit))
+ /**
+ * Get the raw data inside the blob for output. We use the
+ * `commitish:path/to/file.txt` format to find it.
+ */
+ if (git_oid_iszero(&blameopts.newest_commit))
strcpy(spec, "HEAD");
else
- git_oid_tostr(spec, sizeof(spec), &opts.newest_commit);
+ git_oid_tostr(spec, sizeof(spec), &blameopts.newest_commit);
strcat(spec, ":");
- strcat(spec, path);
+ strcat(spec, o.path);
+
+ check_lg2(git_revparse_single(&obj, repo, spec), "Object lookup error", NULL);
+ check_lg2(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error", NULL);
+ git_object_free(obj);
- {
- git_object *obj;
- check_lg2(git_revparse_single(&obj, repo, spec), "Object lookup error", NULL);
- check_lg2(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error", NULL);
- git_object_free(obj);
- }
rawdata = git_blob_rawcontent(blob);
- /* Produce the output */
+ /** Produce the output. */
line = 1;
i = 0;
break_on_null_hunk = 0;
@@ -146,11 +118,14 @@ int main(int argc, char *argv[])
line++;
}
- /* Cleanup */
+ /** Cleanup. */
git_blob_free(blob);
git_blame_free(blame);
git_repository_free(repo);
+
git_threads_shutdown();
+
+ return 0;
}
static void usage(const char *msg, const char *arg)
@@ -169,3 +144,55 @@ static void usage(const char *msg, const char *arg)
exit(1);
}
+/** Parse the arguments. */
+static void parse_opts(struct opts *o, int argc, char *argv[])
+{
+ int i;
+ char *bare_args[3] = {0};
+
+ if (argc < 2) usage(NULL, NULL);
+
+ for (i=1; i<argc; i++) {
+ char *a = argv[i];
+
+ if (a[0] != '-') {
+ int i=0;
+ while (bare_args[i] && i < 3) ++i;
+ if (i >= 3)
+ usage("Invalid argument set", NULL);
+ bare_args[i] = a;
+ }
+ else if (!strcmp(a, "--"))
+ continue;
+ else if (!strcasecmp(a, "-M"))
+ o->M = 1;
+ else if (!strcasecmp(a, "-C"))
+ o->C = 1;
+ else if (!strcasecmp(a, "-L")) {
+ i++; a = argv[i];
+ if (i >= argc) fatal("Not enough arguments to -L", NULL);
+ check_lg2(sscanf(a, "%d,%d", &o->start_line, &o->end_line)-2, "-L format error", NULL);
+ }
+ else {
+ /* commit range */
+ if (o->commitspec) fatal("Only one commit spec allowed", NULL);
+ o->commitspec = a;
+ }
+ }
+
+ /* Handle the bare arguments */
+ if (!bare_args[0]) usage("Please specify a path", NULL);
+ o->path = bare_args[0];
+ if (bare_args[1]) {
+ /* <commitspec> <path> */
+ o->path = bare_args[1];
+ o->commitspec = bare_args[0];
+ }
+ if (bare_args[2]) {
+ /* <oldcommit> <newcommit> <path> */
+ char spec[128] = {0};
+ o->path = bare_args[2];
+ sprintf(spec, "%s..%s", bare_args[0], bare_args[1]);
+ o->commitspec = spec;
+ }
+}