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Reorganize and doc-commentify blame sample.

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This commit is contained in:
Ben Straub 2013-11-04 15:48:35 -08:00
parent b7bb086b1c
commit e6b85be7cf
1 changed files with 96 additions and 69 deletions
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165
examples/blame.c
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@ -19,104 +19,76 @@
* simulate the output of `git blame` and a few of its command line arguments. * 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 main(int argc, char *argv[])
{ {
int i, line, break_on_null_hunk; 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}; char spec[1024] = {0};
struct opts o = {0};
const char *rawdata;
git_repository *repo = NULL; git_repository *repo = NULL;
git_revspec revspec = {0}; 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_blame *blame = NULL;
git_blob *blob; git_blob *blob;
git_object *obj;
git_threads_init(); git_threads_init();
if (argc < 2) usage(NULL, NULL); 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;
for (i=1; i<argc; i++) { /** Open the repository. */
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"))
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 */
check_lg2(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository", NULL); check_lg2(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository", NULL);
/* Parse the end points */ /**
if (commitspec) { * The commit range comes in "commitish" form. Use the rev-parse API to
check_lg2(git_revparse(&revspec, repo, commitspec), "Couldn't parse commit spec", NULL); * 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) { 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); git_object_free(revspec.from);
} else { } else {
git_oid_cpy(&opts.oldest_commit, git_object_id(revspec.from)); git_oid_cpy(&blameopts.oldest_commit, git_object_id(revspec.from));
git_oid_cpy(&opts.newest_commit, git_object_id(revspec.to)); git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.to));
git_object_free(revspec.from); git_object_free(revspec.from);
git_object_free(revspec.to); git_object_free(revspec.to);
} }
} }
/* Run the blame */ /** Run the blame. */
check_lg2(git_blame_file(&blame, repo, path, &opts), "Blame error", NULL); 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"); strcpy(spec, "HEAD");
else else
git_oid_tostr(spec, sizeof(spec), &opts.newest_commit); git_oid_tostr(spec, sizeof(spec), &blameopts.newest_commit);
strcat(spec, ":"); 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); rawdata = git_blob_rawcontent(blob);
/* Produce the output */ /** Produce the output. */
line = 1; line = 1;
i = 0; i = 0;
break_on_null_hunk = 0; break_on_null_hunk = 0;
@ -146,11 +118,14 @@ int main(int argc, char *argv[])
line++; line++;
} }
/* Cleanup */ /** Cleanup. */
git_blob_free(blob); git_blob_free(blob);
git_blame_free(blame); git_blame_free(blame);
git_repository_free(repo); git_repository_free(repo);
git_threads_shutdown(); git_threads_shutdown();
return 0;
} }
static void usage(const char *msg, const char *arg) static void usage(const char *msg, const char *arg)
@ -169,3 +144,55 @@ static void usage(const char *msg, const char *arg)
exit(1); 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;
}
}