Subject: [PATCH v4 1/4] worktree: improve message when creating a new worktree

From: Thomas Gummerer <[email-masked]>
Date: Sat, 17 Mar 2018 22:22:16 +0000

Currently 'git worktree add' produces output like the following, when
'--no-checkout' is not given:

    Preparing foo (identifier foo)
    HEAD is now at 26da330922 <title>

where the first line is written to stderr, and the second line coming
from 'git reset --hard' is written to stdout, even though both lines are
supposed to tell the user what has happened.  In addition to someone not
familiar with 'git worktree', this might seem as if the current HEAD was
modified, not the HEAD in the new working tree.

If the '--no-checkout' flag is given, the output of 'git worktree add'
is just:

    Preparing foo (identifier foo)

even though the HEAD is set to a commit, which is just not checked out.

The identifier is also not particularly relevant for the user at the
moment, as it's only used internally to distinguish between different
worktrees that have the same $(basename <path>).

Fix these inconsistencies, and no longer show the identifier by making
the 'git reset --hard' call quiet, and printing the message directly
from the builtin command instead.

Signed-off-by: Thomas Gummerer <[email-masked]>
---
 builtin/worktree.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/builtin/worktree.c b/builtin/worktree.c
index 7cef5b120b..e5d04f0b4b 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -303,8 +303,6 @@ static int add_worktree(const char *path, const char *refname,
 	strbuf_addf(&sb, "%s/commondir", sb_repo.buf);
 	write_file(sb.buf, "../..");
 
-	fprintf_ln(stderr, _("Preparing %s (identifier %s)"), path, name);
-
 	argv_array_pushf(&child_env, "%s=%s", GIT_DIR_ENVIRONMENT, sb_git.buf);
 	argv_array_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
 	cp.git_cmd = 1;
@@ -320,10 +318,19 @@ static int add_worktree(const char *path, const char *refname,
 	if (ret)
 		goto done;
 
+	fprintf(stderr, _("worktree HEAD is now at %s"),
+		find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV));
+
+	strbuf_reset(&sb);
+	pp_commit_easy(CMIT_FMT_ONELINE, commit, &sb);
+	if (sb.len > 0)
+		fprintf(stderr, " %s", sb.buf);
+	fputc('\n', stderr);
+
 	if (opts->checkout) {
 		cp.argv = NULL;
 		argv_array_clear(&cp.args);
-		argv_array_pushl(&cp.args, "reset", "--hard", NULL);
+		argv_array_pushl(&cp.args, "reset", "--hard", "--quiet", NULL);
 		cp.env = child_env.argv;
 		ret = run_command(&cp);
 		if (ret)
-- 
2.17.0.rc0.231.g781580f06