Add basic end-to-end test for build -P

... also verifying that we can look into tree outputs

2 files changed, 60 insertions, 1 deletions

diff --git a/test/end-to-end/cli/TARGETS b/test/end-to-end/cli/TARGETS
index 2306af70..b4a8f996 100644
--- a/test/end-to-end/cli/TARGETS
+++ b/test/end-to-end/cli/TARGETS
@@ -16,9 +16,15 @@
   , "test": ["install.sh"]
   , "deps": [["end-to-end", "tool-under-test"]]
   }
+, "build -P":
+  { "type": ["@", "rules", "shell/test", "script"]
+  , "name": ["build-P"]
+  , "test": ["build-p.sh"]
+  , "deps": [["end-to-end", "tool-under-test"]]
+  }
 , "TESTS":
   { "type": "install"
   , "tainted": ["test"]
-  , "deps": ["defaults", "pwd", "install"]
+  , "deps": ["defaults", "pwd", "install", "build -P"]
   }
 }
diff --git a/test/end-to-end/cli/build-p.sh b/test/end-to-end/cli/build-p.sh
new file mode 100644
index 00000000..853ab3e3
--- /dev/null
+++ b/test/end-to-end/cli/build-p.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+# Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+set -e
+
+ROOT=$(pwd)
+JUST=$(realpath ./bin/tool-under-test)
+BUILDROOT="${TEST_TMPDIR}/build-root"
+
+touch ROOT
+cat > TARGETS <<'EOF'
+{ "":
+  { "type": "generic"
+  , "out_dirs": ["foo/bar"]
+  , "cmds":
+    [ "mkdir -p foo/bar/baz/greeting"
+    , "echo Hello World > foo/bar/baz/greeting/hello.txt"
+    ]
+  }
+}
+EOF
+
+"${JUST}" build --local-build-root "${BUILDROOT}" --dump-artifacts out.json 2>&1
+echo
+cat out.json
+# foo/bar is the output artifact, and it is a tree
+[ $(jq -rM '."foo/bar"."file_type"' out.json) = "t" ]
+
+# Therefore, foo is not an output artifact, so requesting -P leaves stdout empty
+"${JUST}" build --local-build-root "${BUILDROOT}" -P foo > foo.txt
+[ -f foo.txt ] && [ -z "$(cat foo.txt)" ]
+
+# Requesting foo/bar gives a human-readable description of the tree
+"${JUST}" build --local-build-root "${BUILDROOT}" -P foo/bar  | grep baz
+
+# going deepter into the tree we stil can get human-readable tree descriptions
+"${JUST}" build --local-build-root "${BUILDROOT}" -P foo/bar/baz/greeting  | grep hello.txt
+
+# Files inside the tree can be retrieved
+"${JUST}" build --local-build-root "${BUILDROOT}" -P foo/bar/baz/greeting/hello.txt  | grep  World
+
+echo OK