Merge branch 'mg/killed-merge'
authorJunio C Hamano <gitster@pobox.com>
Sun, 27 Aug 2017 05:55:10 +0000 (22:55 -0700)
committerJunio C Hamano <gitster@pobox.com>
Sun, 27 Aug 2017 05:55:10 +0000 (22:55 -0700)
Killing "git merge --edit" before the editor returns control left
the repository in a state with MERGE_MSG but without MERGE_HEAD,
which incorrectly tells the subsequent "git commit" that there was
a squash merge in progress.  This has been fixed.

* mg/killed-merge:
  merge: save merge state earlier
  merge: split write_merge_state in two
  merge: clarify call chain
  Documentation/git-merge: explain --continue

Documentation/git-merge.txt
builtin/merge.c
t/t7600-merge.sh

index 6b308ab..615e6ba 100644 (file)
@@ -288,7 +288,10 @@ After seeing a conflict, you can do two things:
 
  * Resolve the conflicts.  Git will mark the conflicts in
    the working tree.  Edit the files into shape and
-   'git add' them to the index.  Use 'git commit' to seal the deal.
+   'git add' them to the index.  Use 'git commit' or
+   'git merge --continue' to seal the deal. The latter command
+   checks whether there is a (interrupted) merge in progress
+   before calling 'git commit'.
 
 You can work through the conflict with a number of tools:
 
index 7b7320d..7df3fe3 100644 (file)
@@ -759,15 +759,19 @@ N_("Please enter a commit message to explain why this merge is necessary,\n"
    "Lines starting with '%c' will be ignored, and an empty message aborts\n"
    "the commit.\n");
 
+static void write_merge_heads(struct commit_list *);
 static void prepare_to_commit(struct commit_list *remoteheads)
 {
        struct strbuf msg = STRBUF_INIT;
        strbuf_addbuf(&msg, &merge_msg);
        strbuf_addch(&msg, '\n');
+       if (squash)
+               BUG("the control must not reach here under --squash");
        if (0 < option_edit)
                strbuf_commented_addf(&msg, _(merge_editor_comment), comment_line_char);
        if (signoff)
                append_signoff(&msg, ignore_non_trailer(msg.buf, msg.len), 0);
+       write_merge_heads(remoteheads);
        write_file_buf(git_path_merge_msg(), msg.buf, msg.len);
        if (run_commit_hook(0 < option_edit, get_index_file(), "prepare-commit-msg",
                            git_path_merge_msg(), "merge", NULL))
@@ -909,7 +913,7 @@ static int setup_with_upstream(const char ***argv)
        return i;
 }
 
-static void write_merge_state(struct commit_list *remoteheads)
+static void write_merge_heads(struct commit_list *remoteheads)
 {
        struct commit_list *j;
        struct strbuf buf = STRBUF_INIT;
@@ -925,8 +929,6 @@ static void write_merge_state(struct commit_list *remoteheads)
                strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
        }
        write_file_buf(git_path_merge_head(), buf.buf, buf.len);
-       strbuf_addch(&merge_msg, '\n');
-       write_file_buf(git_path_merge_msg(), merge_msg.buf, merge_msg.len);
 
        strbuf_reset(&buf);
        if (fast_forward == FF_NO)
@@ -934,6 +936,13 @@ static void write_merge_state(struct commit_list *remoteheads)
        write_file_buf(git_path_merge_mode(), buf.buf, buf.len);
 }
 
+static void write_merge_state(struct commit_list *remoteheads)
+{
+       write_merge_heads(remoteheads);
+       strbuf_addch(&merge_msg, '\n');
+       write_file_buf(git_path_merge_msg(), merge_msg.buf, merge_msg.len);
+}
+
 static int default_edit_option(void)
 {
        static const char name[] = "GIT_MERGE_AUTOEDIT";
index 2ebda50..80194b7 100755 (executable)
@@ -774,4 +774,19 @@ test_expect_success 'merge can be completed with --continue' '
        verify_parents $c0 $c1
 '
 
+write_script .git/FAKE_EDITOR <<EOF
+# kill -TERM command added below.
+EOF
+
+test_expect_success EXECKEEPSPID 'killed merge can be completed with --continue' '
+       git reset --hard c0 &&
+       ! "$SHELL_PATH" -c '\''
+         echo kill -TERM $$ >> .git/FAKE_EDITOR
+         GIT_EDITOR=.git/FAKE_EDITOR
+         export GIT_EDITOR
+         exec git merge --no-ff --edit c1'\'' &&
+       git merge --continue &&
+       verify_parents $c0 $c1
+'
+
 test_done