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author | Ben Straub <bs@github.com> | 2013-09-16 16:27:10 -0700 |
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committer | Ben Straub <bs@github.com> | 2013-09-16 16:27:21 -0700 |
commit | 4c7fdb4d3d7b24e4bca69a710d347cfeb05ac78f (patch) | |
tree | 703f7d7f2ac0faebfee92679e227152a5a94ff3a /examples/blame.c | |
parent | ceab4e260637dc8374d0348ee9a078ab1c16e4ad (diff) | |
download | libgit2-4c7fdb4d3d7b24e4bca69a710d347cfeb05ac78f.tar.gz |
Add blame example
Diffstat (limited to 'examples/blame.c')
-rw-r--r-- | examples/blame.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/examples/blame.c b/examples/blame.c new file mode 100644 index 000000000..1b08ec487 --- /dev/null +++ b/examples/blame.c @@ -0,0 +1,131 @@ +#include <stdio.h> +#include <git2.h> +#include <stdlib.h> +#include <string.h> + +static void check(int error, const char *msg) +{ + if (error) { + fprintf(stderr, "%s (%d)\n", msg, error); + exit(error); + } +} + +static void usage(const char *msg, const char *arg) +{ + if (msg && arg) + fprintf(stderr, "%s: %s\n", msg, arg); + else if (msg) + fprintf(stderr, "%s\n", msg); + fprintf(stderr, "usage: blame <path> [options] [<commit range>]\n"); + fprintf(stderr, "\n"); + fprintf(stderr, " <commit range> example: `HEAD~10..HEAD`, or `1234abcd`\n"); + fprintf(stderr, " -L <n,m> process only line range n-m, counting from 1\n"); + fprintf(stderr, " -M fine line moves within and across files\n"); + fprintf(stderr, " -C find line copies within and across files\n"); + fprintf(stderr, "\n"); + exit(1); +} + +int main(int argc, char *argv[]) +{ + int i; + char *path = NULL, *a; + const char *rawdata, *commitspec=NULL; + git_repository *repo = NULL; + git_revspec revspec = {0}; + git_blame_options opts = GIT_BLAME_OPTIONS_INIT; + git_blame *blame = NULL; + git_commit *commit; + git_tree *tree; + git_tree_entry *entry; + git_blob *blob; + + if (argc < 2) usage(NULL, NULL); + path = argv[1]; + + for (i=2; i<argc; i++) { + a = argv[i]; + + if (!strcmp(a, "-M")) + opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES; + else if (!strcmp(a, "-C")) + opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES; + else if (!strncmp(a, "-L", 3)) { + i++; a = argv[i]; + if (i >= argc) check(-1, "Not enough arguments to -L"); + check(sscanf(a, "%d,%d", &opts.min_line, &opts.max_line)-2, "-L format error"); + } + else { + /* commit range */ + if (commitspec) check(-1, "Only one commit spec allowed"); + commitspec = a; + } + } + + /* Open the repo */ + check(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository"); + + /* Parse the end points */ + if (commitspec) { + check(git_revparse(&revspec, repo, commitspec), "Couldn't parse commit spec"); + if (revspec.flags & GIT_REVPARSE_SINGLE) { + git_oid_cpy(&opts.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_object_free(revspec.from); + git_object_free(revspec.to); + } + } + + /* Run the blame */ + check(git_blame_file(&blame, repo, path, &opts), "Blame error"); + + /* Get the raw data for output */ + if (git_oid_iszero(&opts.newest_commit)) { + git_object *obj; + check(git_revparse_single(&obj, repo, "HEAD"), "Can't find HEAD"); + git_oid_cpy(&opts.newest_commit, git_object_id(obj)); + git_object_free(obj); + } + check(git_commit_lookup(&commit, repo, &opts.newest_commit), "Commit lookup error"); + check(git_commit_tree(&tree, commit), "Commit tree lookup error"); + check(git_tree_entry_bypath(&entry, tree, path), "Tree entry lookup error"); + check(git_blob_lookup(&blob, repo, git_tree_entry_id(entry)), "Blob lookup error"); + rawdata = git_blob_rawcontent(blob); + + /* Produce the output */ + i = 1; + while (rawdata[0]) { + const char *eol = strchr(rawdata, '\n'); + char oid[10] = {0}; + const git_blame_hunk *hunk = git_blame_get_hunk_byline(blame, i); + git_commit *hunkcommit; + const git_signature *sig; + + git_oid_tostr(oid, 10, &hunk->final_commit_id); + check(git_commit_lookup(&hunkcommit, repo, &hunk->final_commit_id), "Commit lookup error"); + sig = git_commit_author(hunkcommit); + + printf("%s ( %-30s %3d) %.*s\n", + oid, + sig->name, + i, + (int)(eol-rawdata), + rawdata); + + git_commit_free(hunkcommit); + rawdata = eol+1; + i++; + } + + /* Cleanup */ + git_blob_free(blob); + git_tree_entry_free(entry); + git_tree_free(tree); + git_commit_free(commit); + git_blame_free(blame); + git_repository_free(repo); +} |