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Reorganize and doc-commentify blame sample.
This commit is contained in:
Ben Straub
parent
b7bb086b1c
commit
e6b85be7cf
165
examples/blame.c
165
examples/blame.c
@ -19,104 +19,76 @@
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* simulate the output of `git blame` and a few of its command line arguments.
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*/
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static void usage(const char *msg, const char *arg);
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struct opts {
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char *path;
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char *commitspec;
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int C;
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int M;
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int start_line;
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int end_line;
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};
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static void parse_opts(struct opts *o, int argc, char *argv[]);
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int main(int argc, char *argv[])
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{
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int i, line, break_on_null_hunk;
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const char *path = NULL, *a;
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const char *rawdata, *commitspec=NULL, *bare_args[3] = {0};
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char spec[1024] = {0};
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struct opts o = {0};
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const char *rawdata;
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git_repository *repo = NULL;
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git_revspec revspec = {0};
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git_blame_options opts = GIT_BLAME_OPTIONS_INIT;
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git_blame_options blameopts = GIT_BLAME_OPTIONS_INIT;
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git_blame *blame = NULL;
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git_blob *blob;
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git_object *obj;
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git_threads_init();
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if (argc < 2) usage(NULL, NULL);
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parse_opts(&o, argc, argv);
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if (o.M) blameopts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES;
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if (o.C) blameopts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
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for (i=1; i<argc; i++) {
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a = argv[i];
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if (a[0] != '-') {
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int i=0;
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while (bare_args[i] && i < 3) ++i;
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if (i >= 3)
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usage("Invalid argument set", NULL);
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bare_args[i] = a;
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}
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else if (!strcmp(a, "--"))
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continue;
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else if (!strcasecmp(a, "-M"))
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opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES;
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else if (!strcasecmp(a, "-C"))
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opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
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else if (!strcasecmp(a, "-L")) {
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i++; a = argv[i];
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if (i >= argc) fatal("Not enough arguments to -L", NULL);
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check_lg2(sscanf(a, "%d,%d", &opts.min_line, &opts.max_line)-2, "-L format error", NULL);
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}
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else {
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/* commit range */
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if (commitspec) fatal("Only one commit spec allowed", NULL);
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commitspec = a;
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}
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}
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/* Handle the bare arguments */
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if (!bare_args[0]) usage("Please specify a path", NULL);
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path = bare_args[0];
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if (bare_args[1]) {
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/* <commitspec> <path> */
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path = bare_args[1];
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commitspec = bare_args[0];
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}
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if (bare_args[2]) {
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/* <oldcommit> <newcommit> <path> */
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path = bare_args[2];
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sprintf(spec, "%s..%s", bare_args[0], bare_args[1]);
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commitspec = spec;
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}
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/* Open the repo */
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/** Open the repository. */
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check_lg2(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository", NULL);
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/* Parse the end points */
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if (commitspec) {
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check_lg2(git_revparse(&revspec, repo, commitspec), "Couldn't parse commit spec", NULL);
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/**
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* The commit range comes in "commitish" form. Use the rev-parse API to
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* nail down the end points.
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*/
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if (o.commitspec) {
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check_lg2(git_revparse(&revspec, repo, o.commitspec), "Couldn't parse commit spec", NULL);
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if (revspec.flags & GIT_REVPARSE_SINGLE) {
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git_oid_cpy(&opts.newest_commit, git_object_id(revspec.from));
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git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.from));
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git_object_free(revspec.from);
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} else {
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git_oid_cpy(&opts.oldest_commit, git_object_id(revspec.from));
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git_oid_cpy(&opts.newest_commit, git_object_id(revspec.to));
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git_oid_cpy(&blameopts.oldest_commit, git_object_id(revspec.from));
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git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.to));
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git_object_free(revspec.from);
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git_object_free(revspec.to);
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}
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}
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/* Run the blame */
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check_lg2(git_blame_file(&blame, repo, path, &opts), "Blame error", NULL);
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/** Run the blame. */
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check_lg2(git_blame_file(&blame, repo, o.path, &blameopts), "Blame error", NULL);
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/* Get the raw data for output */
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if (git_oid_iszero(&opts.newest_commit))
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/**
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* Get the raw data inside the blob for output. We use the
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* `commitish:path/to/file.txt` format to find it.
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*/
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if (git_oid_iszero(&blameopts.newest_commit))
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strcpy(spec, "HEAD");
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else
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git_oid_tostr(spec, sizeof(spec), &opts.newest_commit);
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git_oid_tostr(spec, sizeof(spec), &blameopts.newest_commit);
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strcat(spec, ":");
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strcat(spec, path);
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strcat(spec, o.path);
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check_lg2(git_revparse_single(&obj, repo, spec), "Object lookup error", NULL);
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check_lg2(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error", NULL);
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git_object_free(obj);
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{
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git_object *obj;
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check_lg2(git_revparse_single(&obj, repo, spec), "Object lookup error", NULL);
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check_lg2(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error", NULL);
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git_object_free(obj);
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}
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rawdata = git_blob_rawcontent(blob);
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/* Produce the output */
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/** Produce the output. */
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line = 1;
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i = 0;
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break_on_null_hunk = 0;
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@ -146,11 +118,14 @@ int main(int argc, char *argv[])
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line++;
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}
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/* Cleanup */
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/** Cleanup. */
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git_blob_free(blob);
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git_blame_free(blame);
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git_repository_free(repo);
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git_threads_shutdown();
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return 0;
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}
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static void usage(const char *msg, const char *arg)
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@ -169,3 +144,55 @@ static void usage(const char *msg, const char *arg)
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exit(1);
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}
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/** Parse the arguments. */
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static void parse_opts(struct opts *o, int argc, char *argv[])
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{
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int i;
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char *bare_args[3] = {0};
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if (argc < 2) usage(NULL, NULL);
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for (i=1; i<argc; i++) {
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char *a = argv[i];
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if (a[0] != '-') {
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int i=0;
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while (bare_args[i] && i < 3) ++i;
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if (i >= 3)
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usage("Invalid argument set", NULL);
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bare_args[i] = a;
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}
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else if (!strcmp(a, "--"))
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continue;
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else if (!strcasecmp(a, "-M"))
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o->M = 1;
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else if (!strcasecmp(a, "-C"))
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o->C = 1;
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else if (!strcasecmp(a, "-L")) {
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i++; a = argv[i];
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if (i >= argc) fatal("Not enough arguments to -L", NULL);
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check_lg2(sscanf(a, "%d,%d", &o->start_line, &o->end_line)-2, "-L format error", NULL);
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}
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else {
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/* commit range */
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if (o->commitspec) fatal("Only one commit spec allowed", NULL);
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o->commitspec = a;
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}
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}
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/* Handle the bare arguments */
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if (!bare_args[0]) usage("Please specify a path", NULL);
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o->path = bare_args[0];
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if (bare_args[1]) {
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/* <commitspec> <path> */
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o->path = bare_args[1];
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o->commitspec = bare_args[0];
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}
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if (bare_args[2]) {
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/* <oldcommit> <newcommit> <path> */
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char spec[128] = {0};
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o->path = bare_args[2];
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sprintf(spec, "%s..%s", bare_args[0], bare_args[1]);
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o->commitspec = spec;
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}
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}
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