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));
+}

c_src/commit.h

@@ -3,5 +3,5 @@
 
 ERL_NIF_TERM geef_commit_tree_id(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
 ERL_NIF_TERM geef_commit_tree(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
-
+ERL_NIF_TERM geef_commit_create(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
 #endif

c_src/geef.c

@@ -163,6 +163,7 @@ static ErlNifFunc geef_funcs[] =
 	{"object_id", 1, geef_object_id},
 	{"commit_tree", 1, geef_commit_tree},
 	{"commit_tree_id", 1, geef_commit_tree_id},
+	{"commit_create",  8, geef_commit_create},
 	{"tree_bypath", 2, geef_tree_bypath},
 	{"tree_nth",     2, geef_tree_nth},
 	{"tree_count",   1, geef_tree_count},

c_src/signature.c

@@ -3,6 +3,93 @@
 #include <string.h>
 #include <git2.h>
 
+int geef_signature_from_erl(git_signature **out, ErlNifEnv *env, ERL_NIF_TERM *err, ERL_NIF_TERM term)
+{
+	const ERL_NIF_TERM *time_tuple, *time, *tuple;
+	ErlNifBinary name, email;
+	git_signature *sig;
+	git_time_t gtime;
+	int offset, arity;
+	unsigned int secs, megasecs;
+
+	memset(&name, 0, sizeof(ErlNifBinary));
+	memset(&email, 0, sizeof(ErlNifBinary));
+
+	if (!enif_get_tuple(env, term, &arity, &tuple))
+		goto on_badarg;
+
+	if (arity != 4)
+		goto on_badarg;
+
+	if (!enif_inspect_iolist_as_binary(env, tuple[1], &name))
+		goto on_badarg;
+
+	if (!enif_inspect_iolist_as_binary(env, tuple[2], &email))
+		goto on_badarg;
+
+	if (!geef_terminate_binary(&name))
+		goto on_oom;
+
+	if (!geef_terminate_binary(&email))
+		goto on_oom;
+
+	/*
+	 * Now that we have the name and e-mail, we need to extract
+	 * the time tuple. This is quite annoying as the time is yet
+	 * another tuple.
+	 */
+	if (!enif_get_tuple(env, tuple[3], &arity, &time_tuple))
+		goto on_badarg;
+
+	if (arity != 2)
+		goto on_badarg;
+
+	/*
+	 * The first element of the time is an erlang timestamp, which
+	 * separates megasecs out, for whatever reason
+	 */
+	if (!enif_get_tuple(env, time_tuple[0], &arity, &time))
+		goto on_badarg;
+
+	if (arity != 3)
+		goto on_badarg;
+
+	if (!enif_get_uint(env, time[0], &megasecs))
+		goto on_badarg;
+	if (!enif_get_uint(env, time[1], &secs))
+		goto on_badarg;
+
+	if (!enif_get_int(env, time_tuple[1], &offset))
+		goto on_badarg;
+
+	gtime = megasecs * 1000000 + secs;
+
+	/* Finally we have all the data */
+
+	if (git_signature_new(&sig, (char *)name.data, (char *)email.data, gtime, offset) < 0) {
+		enif_release_binary(&name);
+		enif_release_binary(&email);
+		*err = geef_error(env);
+		return -1;
+	}
+
+	*out = sig;
+	return 0;
+
+on_badarg:
+		enif_release_binary(&name);
+		enif_release_binary(&email);
+		*err = enif_make_badarg(env);
+		return -1;
+
+on_oom:
+		enif_release_binary(&name);
+		enif_release_binary(&email);
+		*err = geef_oom(env);
+		return -1;
+
+}
+
 static int geef_string_to_bin(ErlNifBinary *bin, const char *str)
 {
 	size_t len;

c_src/signature.h

@@ -1,4 +1,10 @@
 #include "geef.h"
 
+#ifndef GEEF_SIGNATURE_H
+#define GEEF_SIGNATURE_H
+
 ERL_NIF_TERM geef_signature_new(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
 ERL_NIF_TERM geef_signature_default(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+int geef_signature_from_erl(git_signature **out, ErlNifEnv *env, ERL_NIF_TERM *err, ERL_NIF_TERM term);
+
+#endif