1 files changed, 117 insertions, 0 deletions
diff --git a/t/t1501-worktree.sh b/t/t1501-worktree.sh
new file mode 100755
index 0000000000..2ee88d8a06
--- /dev/null
+++ b/t/t1501-worktree.sh
@@ -0,0 +1,117 @@
+#!/bin/sh
+
+test_description='test separate work tree'
+. ./test-lib.sh
+
+test_rev_parse() {
+	name=$1
+	shift
+
+	test_expect_success "$name: is-bare-repository" \
+	"test '$1' = \"\$(git rev-parse --is-bare-repository)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: is-inside-git-dir" \
+	"test '$1' = \"\$(git rev-parse --is-inside-git-dir)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: is-inside-work-tree" \
+	"test '$1' = \"\$(git rev-parse --is-inside-work-tree)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: prefix" \
+	"test '$1' = \"\$(git rev-parse --show-prefix)\""
+	shift
+	[ $# -eq 0 ] && return
+}
+
+mkdir -p work/sub/dir || exit 1
+mv .git repo.git || exit 1
+
+say "core.worktree = relative path"
+GIT_DIR=repo.git
+GIT_CONFIG="$(pwd)"/$GIT_DIR/config
+export GIT_DIR GIT_CONFIG
+unset GIT_WORK_TREE
+git config core.worktree ../work
+test_rev_parse 'outside'      false false false
+cd work || exit 1
+GIT_DIR=../repo.git
+GIT_CONFIG="$(pwd)"/$GIT_DIR/config
+test_rev_parse 'inside'       false false true ''
+cd sub/dir || exit 1
+GIT_DIR=../../../repo.git
+GIT_CONFIG="$(pwd)"/$GIT_DIR/config
+test_rev_parse 'subdirectory' false false true sub/dir/
+cd ../../.. || exit 1
+
+say "core.worktree = absolute path"
+GIT_DIR=$(pwd)/repo.git
+GIT_CONFIG=$GIT_DIR/config
+git config core.worktree "$(pwd)/work"
+test_rev_parse 'outside'      false false false
+cd work || exit 1
+test_rev_parse 'inside'       false false true ''
+cd sub/dir || exit 1
+test_rev_parse 'subdirectory' false false true sub/dir/
+cd ../../.. || exit 1
+
+say "GIT_WORK_TREE=relative path (override core.worktree)"
+GIT_DIR=$(pwd)/repo.git
+GIT_CONFIG=$GIT_DIR/config
+git config core.worktree non-existent
+GIT_WORK_TREE=work
+export GIT_WORK_TREE
+test_rev_parse 'outside'      false false false
+cd work || exit 1
+GIT_WORK_TREE=.
+test_rev_parse 'inside'       false false true ''
+cd sub/dir || exit 1
+GIT_WORK_TREE=../..
+test_rev_parse 'subdirectory' false false true sub/dir/
+cd ../../.. || exit 1
+
+mv work repo.git/work
+
+say "GIT_WORK_TREE=absolute path, work tree below git dir"
+GIT_DIR=$(pwd)/repo.git
+GIT_CONFIG=$GIT_DIR/config
+GIT_WORK_TREE=$(pwd)/repo.git/work
+test_rev_parse 'outside'              false false false
+cd repo.git || exit 1
+test_rev_parse 'in repo.git'              false true  false
+cd objects || exit 1
+test_rev_parse 'in repo.git/objects'      false true  false
+cd ../work || exit 1
+test_rev_parse 'in repo.git/work'         false true true ''
+cd sub/dir || exit 1
+test_rev_parse 'in repo.git/sub/dir' false true true sub/dir/
+cd ../../../.. || exit 1
+
+test_expect_success 'repo finds its work tree' '
+	(cd repo.git &&
+	 : > work/sub/dir/untracked &&
+	 test sub/dir/untracked = "$(git ls-files --others)")
+'
+
+test_expect_success 'repo finds its work tree from work tree, too' '
+	(cd repo.git/work/sub/dir &&
+	 : > tracked &&
+	 git --git-dir=../../.. add tracked &&
+	 cd ../../.. &&
+	 test sub/dir/tracked = "$(git ls-files)")
+'
+
+test_expect_success '_gently() groks relative GIT_DIR & GIT_WORK_TREE' '
+	cd repo.git/work/sub/dir &&
+	GIT_DIR=../../.. GIT_WORK_TREE=../.. GIT_PAGER= \
+		git diff --exit-code tracked &&
+	echo changed > tracked &&
+	! GIT_DIR=../../.. GIT_WORK_TREE=../.. GIT_PAGER= \
+		git diff --exit-code tracked
+'
+
+test_done