tests: export GIT_DIR=. after cd into bare repos

As part of the preparation for `safe.bareRepository` defaulting to
`explicit` (see 8d1a744), add `GIT_DIR=. && export GIT_DIR &&`
right after `cd <bare> &&` so that subsequent commands access the bare
repo explicitly rather than relying on implicit discovery.

Here is a command-line to help verify this commit mechanically (the
awk script undoes the transformation on the new lines; empty output
is success):

    git diff HEAD^! | awk '
      /^diff/,/^\+\+\+/ { next }
      /^-/ { old[m++] = substr($0,2) }
      /^\+/ {
        new = substr($0,2)
        # undo: strip GIT_DIR export
        gsub(/ && GIT_DIR=[.] && export GIT_DIR/, "", new)
        if (old[n++] != new) print old[n-1] " != " new
      }'

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

t/annotate-tests.sh

@@ -86,7 +86,7 @@ test_expect_success 'blame with --contents' '
 test_expect_success 'blame with --contents in a bare repo' '
 	git clone --bare . bare-contents.git &&
 	(
-		cd bare-contents.git &&
+		cd bare-contents.git && GIT_DIR=. && export GIT_DIR &&
 		echo "1A quick brown fox jumps over the" >contents &&
 		check_count --contents=contents A 1
 	)
@@ -101,7 +101,7 @@ test_expect_success 'blame with --contents changed' '
 test_expect_success 'blame in a bare repo without starting commit' '
 	git clone --bare . bare.git &&
 	(
-		cd bare.git &&
+		cd bare.git && GIT_DIR=. && export GIT_DIR &&
 		check_count A 2
 	)
 '

t/lib-bitmap.sh

@@ -207,7 +207,7 @@ basic_bitmap_tests () {
 		rm -fr partial-clone.git &&
 		git clone --no-local --bare --filter=blob:none . partial-clone.git &&
 		(
-			cd partial-clone.git &&
+			cd partial-clone.git && GIT_DIR=. && export GIT_DIR &&
 			pack=$(echo objects/pack/*.pack) &&
 			git verify-pack -v "$pack" >have &&
 			awk "/blob/ { print \$1 }" <have >blobs &&

t/lib-proto-disable.sh

@@ -17,7 +17,7 @@ test_allow_var () {
 
 	test_expect_success "fetch $desc (enabled)" '
 		(
-			cd tmp.git &&
+			cd tmp.git && GIT_DIR=. && export GIT_DIR &&
 			GIT_ALLOW_PROTOCOL=$proto &&
 			export GIT_ALLOW_PROTOCOL &&
 			git fetch
@@ -26,7 +26,7 @@ test_allow_var () {
 
 	test_expect_success "push $desc (enabled)" '
 		(
-			cd tmp.git &&
+			cd tmp.git && GIT_DIR=. && export GIT_DIR &&
 			GIT_ALLOW_PROTOCOL=$proto &&
 			export GIT_ALLOW_PROTOCOL &&
 			git push origin HEAD:pushed
@@ -35,7 +35,7 @@ test_allow_var () {
 
 	test_expect_success "push $desc (disabled)" '
 		(
-			cd tmp.git &&
+			cd tmp.git && GIT_DIR=. && export GIT_DIR &&
 			GIT_ALLOW_PROTOCOL=none &&
 			export GIT_ALLOW_PROTOCOL &&
 			test_must_fail git push origin HEAD:pushed
@@ -44,7 +44,7 @@ test_allow_var () {
 
 	test_expect_success "fetch $desc (disabled)" '
 		(
-			cd tmp.git &&
+			cd tmp.git && GIT_DIR=. && export GIT_DIR &&
 			GIT_ALLOW_PROTOCOL=none &&
 			export GIT_ALLOW_PROTOCOL &&
 			test_must_fail git fetch
@@ -119,7 +119,7 @@ test_config () {
 
 	test_expect_success "push $desc (disabled)" '
 		(
-			cd tmp.git &&
+			cd tmp.git && GIT_DIR=. && export GIT_DIR &&
 			GIT_PROTOCOL_FROM_USER=0 &&
 			export GIT_PROTOCOL_FROM_USER &&
 			test_must_fail git -c protocol.$proto.allow=user push origin HEAD:pushed
@@ -128,7 +128,7 @@ test_config () {
 
 	test_expect_success "fetch $desc (disabled)" '
 		(
-			cd tmp.git &&
+			cd tmp.git && GIT_DIR=. && export GIT_DIR &&
 			GIT_PROTOCOL_FROM_USER=0 &&
 			export GIT_PROTOCOL_FROM_USER &&
 			test_must_fail git -c protocol.$proto.allow=user fetch

t/t1006-cat-file.sh

@@ -804,7 +804,7 @@ test_expect_success 'clean up broken objects' '
 test_expect_success 'cat-file -t and -s on corrupt loose object' '
 	git init --bare corrupt-loose.git &&
 	(
-		cd corrupt-loose.git &&
+		cd corrupt-loose.git && GIT_DIR=. && export GIT_DIR &&
 
 		# Setup and create the empty blob and its path
 		empty_path=$(git rev-parse --git-path objects/$(test_oid_to_path "$EMPTY_BLOB")) &&

t/t1450-fsck.sh

@@ -53,7 +53,7 @@ remove_object () {
 test_expect_success 'object with hash mismatch' '
 	git init --bare hash-mismatch &&
 	(
-		cd hash-mismatch &&
+		cd hash-mismatch && GIT_DIR=. && export GIT_DIR &&
 
 		oid=$(echo blob | git hash-object -w --stdin) &&
 		oldoid=$oid &&
@@ -75,7 +75,7 @@ test_expect_success 'object with hash mismatch' '
 test_expect_success 'zlib corrupt loose object output ' '
 	git init --bare corrupt-loose-output &&
 	(
-		cd corrupt-loose-output &&
+		cd corrupt-loose-output && GIT_DIR=. && export GIT_DIR &&
 		oid=$(git hash-object -w --stdin --literally </dev/null) &&
 		oidf=objects/$(test_oid_to_path "$oid") &&
 		chmod +w $oidf &&
@@ -1064,7 +1064,7 @@ test_expect_success PERL_TEST_HELPERS 'detect corrupt index file in fsck' '
 test_expect_success 'fsck error and recovery on invalid object type' '
 	git init --bare garbage-type &&
 	(
-		cd garbage-type &&
+		cd garbage-type && GIT_DIR=. && export GIT_DIR &&
 
 		garbage_blob=$(loose_obj objects garbage </dev/null) &&
 

t/t1512-rev-parse-disambiguation.sh

@@ -39,7 +39,7 @@ test_cmp_failed_rev_parse () {
 test_expect_success 'ambiguous blob output' '
 	git init --bare blob.prefix &&
 	(
-		cd blob.prefix &&
+		cd blob.prefix && GIT_DIR=. && export GIT_DIR &&
 
 		# Both start with "dead..", under both SHA-1 and SHA-256
 		echo brocdnra | git hash-object -w --stdin &&
@@ -65,7 +65,7 @@ test_expect_success 'ambiguous blob output' '
 test_expect_success 'ambiguous loose bad object parsed as OBJ_BAD' '
 	git init --bare blob.bad &&
 	(
-		cd blob.bad &&
+		cd blob.bad && GIT_DIR=. && export GIT_DIR &&
 
 		# Both have the prefix "bad0"
 		echo xyzfaowcoh | loose_obj objects bad &&
@@ -81,7 +81,7 @@ test_expect_success 'ambiguous loose bad object parsed as OBJ_BAD' '
 test_expect_success POSIXPERM 'ambigous zlib corrupt loose blob' '
 	git init --bare blob.corrupt &&
 	(
-		cd blob.corrupt &&
+		cd blob.corrupt && GIT_DIR=. && export GIT_DIR &&
 
 		# Both have the prefix "cafe"
 		echo bnkxmdwz | git hash-object -w --stdin &&

t/t2400-worktree-add.sh

@@ -177,7 +177,7 @@ test_expect_success '"add" from a bare repo' '
 
 test_expect_success 'checkout from a bare repo without "add"' '
 	(
-		cd bare &&
+		cd bare && GIT_DIR=. && export GIT_DIR &&
 		test_must_fail git checkout main
 	)
 '

t/t3451-history-reword.sh

@@ -150,7 +150,7 @@ test_expect_success 'can reword in a bare repo' '
 	test_commit -C repo first &&
 	git clone --bare repo repo.git &&
 	(
-		cd repo.git &&
+		cd repo.git && GIT_DIR=. && export GIT_DIR &&
 		reword_with_message HEAD <<-EOF &&
 		reworded
 		EOF

t/t4203-mailmap.sh

@@ -432,7 +432,7 @@ test_expect_success 'mailmap.blob defaults to off in non-bare repo' '
 test_expect_success 'mailmap.blob defaults to HEAD:.mailmap in bare repo' '
 	git clone --bare non-bare bare &&
 	(
-		cd bare &&
+		cd bare && GIT_DIR=. && export GIT_DIR &&
 		cat >expect <<-\EOF &&
 		     1	Fake Name
 		EOF

t/t5001-archive-attr.sh

@@ -127,12 +127,12 @@ test_expect_exists	worktree2/ignored-by-tree
 test_expect_missing	worktree2/ignored-by-worktree
 
 test_expect_success 'git archive vs. bare' '
-	(cd bare && git archive HEAD) >bare-archive.tar &&
+	(cd bare && GIT_DIR=. && export GIT_DIR && git archive HEAD) >bare-archive.tar &&
 	test_cmp_bin archive.tar bare-archive.tar
 '
 
 test_expect_success 'git archive with worktree attributes, bare' '
-	(cd bare &&
+	(cd bare && GIT_DIR=. && export GIT_DIR &&
 	git -c attr.tree=HEAD archive --worktree-attributes HEAD) >bare-worktree.tar &&
 	(mkdir bare-worktree && cd bare-worktree && "$TAR" xf -) <bare-worktree.tar
 '