autoconf: Add link tests to each AC_CHECK_FUNC() test

[git.git] / builtin-merge.c

diff --git a/builtin-merge.c b/builtin-merge.c
index afa01c659e4a6c6727639ca528265cbb92dfe14c..5e7910bd8da0a603dd82e7502c28a603bf80fa82 100644 (file)
--- a/builtin-merge.c
+++ b/builtin-merge.c
@@ -123,8 +123,7 @@ static struct strategy *get_strategy(const char *name)
                exit(1);
        }
 
-       ret = xmalloc(sizeof(struct strategy));
-       memset(ret, 0, sizeof(struct strategy));
+       ret = xcalloc(1, sizeof(struct strategy));
        ret->name = xstrdup(name);
        return ret;
 }
@@ -180,6 +179,7 @@ static void drop_save(void)
 {
        unlink(git_path("MERGE_HEAD"));
        unlink(git_path("MERGE_MSG"));
+       unlink(git_path("MERGE_MODE"));
 }
 
 static void save_state(void)
@@ -227,7 +227,7 @@ static void reset_hard(unsigned const char *sha1, int verbose)
 
 static void restore_state(void)
 {
-       struct strbuf sb;
+       struct strbuf sb = STRBUF_INIT;
        const char *args[] = { "stash", "apply", NULL, NULL };
 
        if (is_null_sha1(stash))
@@ -235,7 +235,6 @@ static void restore_state(void)
 
        reset_hard(head, 1);
 
-       strbuf_init(&sb, 0);
        args[2] = sha1_to_hex(stash);
 
        /*
@@ -259,7 +258,7 @@ static void squash_message(void)
 {
        struct rev_info rev;
        struct commit *commit;
-       struct strbuf out;
+       struct strbuf out = STRBUF_INIT;
        struct commit_list *j;
        int fd;
 
@@ -283,7 +282,6 @@ static void squash_message(void)
        if (prepare_revision_walk(&rev))
                die("revision walk setup failed");
 
-       strbuf_init(&out, 0);
        strbuf_addstr(&out, "Squashed commit of the following:\n");
        while ((commit = get_revision(&rev)) != NULL) {
                strbuf_addch(&out, '\n');
@@ -328,9 +326,8 @@ static int run_hook(const char *name)
 
 static void finish(const unsigned char *new_head, const char *msg)
 {
-       struct strbuf reflog_message;
+       struct strbuf reflog_message = STRBUF_INIT;
 
-       strbuf_init(&reflog_message, 0);
        if (!msg)
                strbuf_addstr(&reflog_message, getenv("GIT_REFLOG_ACTION"));
        else {
@@ -381,7 +378,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
 {
        struct object *remote_head;
        unsigned char branch_head[20], buf_sha[20];
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        const char *ptr;
        int len, early;
 
@@ -390,7 +387,6 @@ static void merge_name(const char *remote, struct strbuf *msg)
        if (!remote_head)
                die("'%s' does not point to a commit", remote);
 
-       strbuf_init(&buf, 0);
        strbuf_addstr(&buf, "refs/heads/");
        strbuf_addstr(&buf, remote);
        resolve_ref(buf.buf, branch_head, 0, 0);
@@ -445,10 +441,9 @@ static void merge_name(const char *remote, struct strbuf *msg)
        if (!strcmp(remote, "FETCH_HEAD") &&
                        !access(git_path("FETCH_HEAD"), R_OK)) {
                FILE *fp;
-               struct strbuf line;
+               struct strbuf line = STRBUF_INIT;
                char *ptr;
 
-               strbuf_init(&line, 0);
                fp = fopen(git_path("FETCH_HEAD"), "r");
                if (!fp)
                        die("could not open %s for reading: %s",
@@ -546,7 +541,7 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
        const char **args;
        int i = 0, ret;
        struct commit_list *j;
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        int index_fd;
        struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
 
@@ -593,7 +588,6 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
        } else {
                args = xmalloc((4 + commit_list_count(common) +
                                        commit_list_count(remoteheads)) * sizeof(char *));
-               strbuf_init(&buf, 0);
                strbuf_addf(&buf, "merge-%s", strategy);
                args[i++] = buf.buf;
                for (j = common; j; j = j->next)
@@ -733,12 +727,12 @@ static void add_strategies(const char *string, unsigned attr)
 static int merge_trivial(void)
 {
        unsigned char result_tree[20], result_commit[20];
-       struct commit_list *parent = xmalloc(sizeof(struct commit_list *));
+       struct commit_list *parent = xmalloc(sizeof(*parent));
 
        write_tree_trivial(result_tree);
        printf("Wonderful.\n");
        parent->item = lookup_commit(head);
-       parent->next = xmalloc(sizeof(struct commit_list *));
+       parent->next = xmalloc(sizeof(*parent->next));
        parent->next->item = remoteheads->item;
        parent->next->next = NULL;
        commit_tree(merge_msg.buf, result_tree, parent, result_commit, NULL);
@@ -848,7 +842,7 @@ static int evaluate_result(void)
 int cmd_merge(int argc, const char **argv, const char *prefix)
 {
        unsigned char result_tree[20];
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        const char *head_arg;
        int flag, head_invalid = 0, i;
        int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
@@ -897,7 +891,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
         * Traditional format never would have "-m" so it is an
         * additional safety measure to check for it.
         */
-       strbuf_init(&buf, 0);
 
        if (!have_message && is_old_style_invocation(argc, argv)) {
                strbuf_addstr(&merge_msg, argv[0]);
@@ -927,7 +920,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                reset_hard(remote_head->sha1, 0);
                return 0;
        } else {
-               struct strbuf msg;
+               struct strbuf msg = STRBUF_INIT;
 
                /* We are invoked directly as the first-class UI. */
                head_arg = "HEAD";
@@ -940,7 +933,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                 * codepath so we discard the error in this
                 * loop.
                 */
-               strbuf_init(&msg, 0);
                for (i = 0; i < argc; i++)
                        merge_name(argv[i], &msg);
                fmt_merge_msg(option_log, &msg, &merge_msg);
@@ -1015,7 +1007,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        !common->next &&
                        !hashcmp(common->item->object.sha1, head)) {
                /* Again the most common case of merging one remote. */
-               struct strbuf msg;
+               struct strbuf msg = STRBUF_INIT;
                struct object *o;
                char hex[41];
 
@@ -1025,7 +1017,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        hex,
                        find_unique_abbrev(remoteheads->item->object.sha1,
                        DEFAULT_ABBREV));
-               strbuf_init(&msg, 0);
                strbuf_addstr(&msg, "Fast forward");
                if (have_message)
                        strbuf_addstr(&msg,
@@ -1220,6 +1211,15 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        merge_msg.len)
                        die("Could not write to %s", git_path("MERGE_MSG"));
                close(fd);
+               fd = open(git_path("MERGE_MODE"), O_WRONLY | O_CREAT | O_TRUNC, 0666);
+               if (fd < 0)
+                       die("Could open %s for writing", git_path("MERGE_MODE"));
+               strbuf_reset(&buf);
+               if (!allow_fast_forward)
+                       strbuf_addf(&buf, "no-ff");
+               if (write_in_full(fd, buf.buf, buf.len) != buf.len)
+                       die("Could not write to %s", git_path("MERGE_MODE"));
+               close(fd);
        }
 
        if (merge_was_ok) {