commit f6764181d7e0fc68673b90cbc93d6064509d0bd7
from: Stefan Sperling <stsp@stsp.name>
date: Fri Sep 24 21:52:59 2021 UTC

fix 'got update' of an added + obstructed file

When 'got update' tried to add a new file to the work tree and this
file was obstructed by, say, a directory on disk, the update failed:

  $ got update
  ?  new
  got: new: Is a directory
  $

And the work tree was not updated.

With this commit this situation is properly detected as an obstruction
and the update succeeds:

  $ got update
  ~  new
  Updated to refs/heads/master: c1f85b4938dc4c668a88f13df2b98a520fc077cc
  File paths obstructed by a non-regular file: 1
  $

Extend a corresponding test case to cover this issue.

ok tracey

commit - f365d76274ee1ae2b57225686a0733176fc4bfb2
commit + f6764181d7e0fc68673b90cbc93d6064509d0bd7
blob - f5bc677438d23ddca778382674edef04e09cb939
blob + 8699471c6069c7d4bc2a233ca24d70202cb6d22b
--- lib/worktree.c
+++ lib/worktree.c
@@ -1942,8 +1942,20 @@ update_blob(struct got_worktree *worktree,
 		if (status == GOT_STATUS_MISSING || status == GOT_STATUS_DELETE)
 			sb.st_mode = got_fileindex_perms_to_st(ie);
 	} else {
-		sb.st_mode = GOT_DEFAULT_FILE_MODE;
-		status = GOT_STATUS_UNVERSIONED;
+		if (stat(ondisk_path, &sb) == -1) {
+			if (errno != ENOENT) {
+				err = got_error_from_errno2("stat",
+				    ondisk_path);
+				goto done;
+			}
+			sb.st_mode = GOT_DEFAULT_FILE_MODE;
+			status = GOT_STATUS_UNVERSIONED;
+		} else {
+			if (S_ISREG(sb.st_mode) || S_ISLNK(sb.st_mode))
+				status = GOT_STATUS_UNVERSIONED;
+			else
+				status = GOT_STATUS_OBSTRUCTED;
+		}
 	}
 
 	if (status == GOT_STATUS_OBSTRUCTED) {
blob - cae602420f097ed69b049e9fffb3fc46510d2de5
blob + 946422e07ecfbb970b7b9f9264e7ee67e4b62d55
--- regress/cmdline/update.sh
+++ regress/cmdline/update.sh
@@ -2588,6 +2588,8 @@ test_update_file_skipped_due_to_obstruction() {
 	blob_id0=`get_blob_id $testroot/repo "" beta`
 
 	echo "changed beta" > $testroot/repo/beta
+	echo "new file" > $testroot/repo/new
+	(cd $testroot/repo && git add new)
 	git_commit $testroot/repo -m "changed beta"
 	local commit_id1=`git_show_head $testroot/repo`
 	blob_id1=`get_blob_id $testroot/repo "" beta`
@@ -2617,14 +2619,22 @@ test_update_file_skipped_due_to_obstruction() {
 
 	rm $testroot/wt/beta
 	mkdir -p $testroot/wt/beta/psi
+	mkdir -p $testroot/wt/new
 
-	# update to the latest commit; this skips beta
+	# update to the latest commit; this skips beta and the new file
 	(cd $testroot/wt && got update > $testroot/stdout)
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		echo "update failed unexpectedly" >&2
+		test_done "$testroot" "1"
+		return 1
+	fi
 
 	echo "~  beta" > $testroot/stdout.expected
+	echo "~  new" >> $testroot/stdout.expected
 	echo "Updated to refs/heads/master: $commit_id1" \
 		>> $testroot/stdout.expected
-	echo "File paths obstructed by a non-regular file: 1" \
+	echo "File paths obstructed by a non-regular file: 2" \
 		>> $testroot/stdout.expected
 	cmp -s $testroot/stdout.expected $testroot/stdout
 	ret="$?"
@@ -2656,8 +2666,11 @@ test_update_file_skipped_due_to_obstruction() {
 	# updating to the latest commit should now update beta
 	(cd $testroot/wt && got update > $testroot/stdout)
 	echo "!  beta" > $testroot/stdout.expected
+	echo "~  new" >> $testroot/stdout.expected
 	echo "Updated to refs/heads/master: $commit_id1" \
 		>> $testroot/stdout.expected
+	echo "File paths obstructed by a non-regular file: 1" \
+		>> $testroot/stdout.expected
 	cmp -s $testroot/stdout.expected $testroot/stdout
 	ret="$?"
 	if [ "$ret" != "0" ]; then