commit-heatmap-gen

commit 838aeb555307787a52f971016be35b3d57027f69
parent 3a7501693588e2df0dd6c03a189007369e53d4d6
Author: brookjeynes <me@brookjeynes.dev>
Date:   Thu, 18 Jun 2026 07:07:09 +1000

feat: walk git tree and retrieve author information

Signed-off-by: brookjeynes <me@brookjeynes.dev>

Diffstat:
M
main.c
 | 
59
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-

1 file changed, 58 insertions(+), 1 deletion(-)
diff --git a/main.c b/main.c
@@ -1,10 +1,67 @@
 #include <git2.h>
+#include <git2/signature.h>
+#include <stdio.h>
+#include <string.h>
 
-int main() {
+int main(int argc, char *argv[]) {
   int error;
 
+  if (argc == 1) {
+    fprintf(stderr, "err: author email required\n");
+    exit(1);
+  }
+
+  char *author_email = argv[1];
+
   git_libgit2_init();
 
+  git_repository *repo = NULL;
+  if ((error = git_repository_open(&repo, "../jido")) < 0) {
+    const git_error *e = git_error_last();
+    printf("err: %d/%d: %s\n", error, e->klass, e->message);
+    exit(error);
+  }
+
+  git_object *obj = NULL;
+  if ((error = git_revparse_single(&obj, repo, "HEAD")) < 0) {
+    const git_error *e = git_error_last();
+    printf("err: %d/%d: %s\n", error, e->klass, e->message);
+    exit(error);
+  }
+
+  const git_oid *head = NULL;
+  head = git_object_id(obj);
+  git_object_free(obj);
+
+  git_revwalk *walker = NULL;
+  if ((error = git_revwalk_new(&walker, repo)) < 0) {
+    const git_error *e = git_error_last();
+    printf("err: %d/%d: %s\n", error, e->klass, e->message);
+    exit(error);
+  }
+
+  if ((error = git_revwalk_push(walker, head)) < 0) {
+    const git_error *e = git_error_last();
+    printf("err: %d/%d: %s\n", error, e->klass, e->message);
+    exit(error);
+  }
+
+  git_oid id;
+  while (!git_revwalk_next(&id, walker)) {
+    git_commit *commit;
+    if ((error = git_commit_lookup(&commit, repo, &id)) < 0) {
+      const git_error *e = git_error_last();
+      printf("err: %d/%d: %s\n", error, e->klass, e->message);
+      exit(error);
+    }
+
+    const git_signature *author = git_commit_author(commit);
+    if (strcmp(author_email, author->email) == 0) {
+      printf("%s <%s> at %ld\n", author->name, author->email,
+             author->when.time);
+    }
+  }
+
   git_libgit2_shutdown();
 
   return 0;