Wrap commit creation

c_src/commit.c

@@ -2,8 +2,10 @@
 #include "repository.h"
 #include "object.h"
 #include "oid.h"
+#include "signature.h"
 #include <string.h>
 #include <git2.h>
+#include <git2/sys/commit.h>
 
 ERL_NIF_TERM
 geef_commit_tree_id(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
@@ -43,3 +45,92 @@ geef_commit_tree(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
 	return enif_make_tuple3(env, atoms.ok, atoms.tree, term_obj);
 
 }
+
+ERL_NIF_TERM
+geef_commit_create(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
+{
+	geef_repository *repo;
+	ErlNifBinary bin;
+	char *ref = NULL, *encoding = NULL, *message = NULL;
+	git_signature *author = NULL, *committer = NULL;
+	ERL_NIF_TERM err, head, tail;
+	unsigned int parents_len, i;
+	git_oid tree, *parents_ids, commit_id;
+	const git_oid **parents_ids_ptrs;
+
+	if (!enif_get_resource(env, argv[0], geef_repository_type, (void **) &repo))
+		return enif_make_badarg(env);
+
+	if (enif_compare(argv[1], atoms.undefined)) {
+		if (!enif_inspect_iolist_as_binary(env, argv[1], &bin))
+		     return enif_make_badarg(env);
+		ref = strndup((char *)bin.data, bin.size);
+		if (ref == NULL)
+			return geef_oom(env);
+	}
+
+	if (geef_signature_from_erl(&author, env, &err, argv[2]) < 0)
+		return err;
+
+	if (geef_signature_from_erl(&committer, env, &err, argv[3]) < 0) {
+		git_signature_free(author);
+		return err;
+	}
+
+	if (enif_compare(argv[4], atoms.undefined)) {
+		if (!enif_inspect_iolist_as_binary(env, argv[4], &bin))
+		     return enif_make_badarg(env);
+		encoding = strndup((char *)bin.data, bin.size);
+		if (encoding == NULL)
+			return geef_oom(env);
+	}
+
+	if (!enif_inspect_iolist_as_binary(env, argv[5], &bin))
+		return enif_make_badarg(env);
+
+	message = strndup((char *)bin.data, bin.size);
+	if (message == NULL)
+		return geef_oom(env);
+
+	if (!enif_inspect_binary(env, argv[6], &bin))
+		return enif_make_badarg(env);
+	if (bin.size != GIT_OID_RAWSZ)
+		return enif_make_badarg(env);
+
+	git_oid_fromraw(&tree, bin.data);
+
+	if (!enif_get_list_length(env, argv[7], &parents_len))
+		return enif_make_badarg(env);
+
+	parents_ids = calloc(parents_len, sizeof(git_oid));
+	if (parents_ids == NULL)
+		return geef_oom(env);
+
+	parents_ids_ptrs = calloc(parents_len, sizeof(git_oid *));
+	if (parents_ids_ptrs == NULL)
+		return geef_oom(env);
+
+	i = 0;
+	tail = argv[8];
+	while (enif_get_list_cell(env, tail, &head, &tail)) {
+		if (!enif_inspect_binary(env, head, &bin))
+			return enif_make_badarg(env);
+		if (bin.size != GIT_OID_RAWSZ)
+			return enif_make_badarg(env);
+
+		git_oid_fromraw(&parents_ids[i], bin.data);
+		parents_ids_ptrs[i] = &parents_ids[i];
+		i++;
+	}
+
+	if (git_commit_create_from_oids(&commit_id, repo->repo, ref, author, committer, encoding, message,
+			      &tree, parents_len, parents_ids_ptrs) < 0)
+		return geef_error(env);
+
+	if (!enif_realloc_binary(&bin, GIT_OID_RAWSZ))
+		return geef_oom(env);
+
+	memcpy(bin.data, &commit_id, GIT_OID_RAWSZ);
+
+	return enif_make_tuple2(env, atoms.ok, enif_make_binary(env, &bin));
+}