Test: Add GC test for export targets

2 files changed, 119 insertions, 1 deletions

diff --git a/test/end-to-end/gc/TARGETS b/test/end-to-end/gc/TARGETS
index d25445de..95091695 100644
--- a/test/end-to-end/gc/TARGETS
+++ b/test/end-to-end/gc/TARGETS
@@ -4,5 +4,15 @@
   , "test": ["basic.sh"]
   , "deps": [["test/end-to-end", "tool-under-test"]]
   }
-, "TESTS": {"type": "install", "tainted": ["test"], "deps": ["basic"]}
+, "export":
+  { "type": ["@", "rules", "shell/test", "script"]
+  , "name": ["export"]
+  , "test": ["export.sh"]
+  , "deps":
+    [ ["test/end-to-end", "tool-under-test"]
+    , ["test/end-to-end", "mr-tool-under-test"]
+    ]
+  }
+, "TESTS":
+  {"type": "install", "tainted": ["test"], "deps": ["basic", "export"]}
 }
diff --git a/test/end-to-end/gc/export.sh b/test/end-to-end/gc/export.sh
new file mode 100644
index 00000000..793ff8a1
--- /dev/null
+++ b/test/end-to-end/gc/export.sh
@@ -0,0 +1,108 @@
+#!/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 -eu
+
+readonly JUST="${PWD}/bin/tool-under-test"
+readonly JUST_MR="${PWD}/bin/mr-tool-under-test"
+readonly LBR="${TEST_TMPDIR}/local-build-root"
+readonly LBR_MR="${TEST_TMPDIR}/local-build-root-mr"
+readonly TOOLS_DIR="${TEST_TMPDIR}/tools"
+readonly OUT="${TEST_TMPDIR}/out"
+readonly JUST_MR_ARGS="--just ${JUST} --local-build-root ${LBR_MR}"
+BUILD_ARGS="--local-build-root ${LBR}"
+if [ -n "${COMPATIBLE:-}" ]; then
+  BUILD_ARGS="$BUILD_ARGS --compatible"
+fi
+
+# Have tools in the "outside environment" to later demonstrate
+# that the action was _not_ rerun.
+mkdir -p "${TOOLS_DIR}"
+cat > "${TOOLS_DIR}/tree" <<'EOF'
+#!/bin/sh
+mkdir -p $1/hello/world/tree
+echo Hello World > $1/hello/world/tree/hello.txt
+echo -n World > $1/hello/world/tree/name.txt
+EOF
+chmod 755 "${TOOLS_DIR}/tree"
+
+
+touch WORKSPACE
+cat > TARGETS <<'EOF'
+{ "tree":
+  { "type": "generic"
+  , "arguments_config": ["ENV"]
+  , "out_dirs": ["out"]
+  , "cmds": ["${TOOLS}/tree out"]
+  , "env": {"type": "var", "name": "ENV"}
+  }
+, "":
+  { "type": "export"
+  , "flexible_config": ["ENV"]
+  , "target": "tree"
+  }
+}
+EOF
+
+cat > repos.json <<'EOF'
+{ "main": ""
+, "repositories":
+  { "":
+    {"repository": {"type": "file", "path": ".", "pragma": {"to_git": true}}}
+  }
+}
+EOF
+
+cat repos.json
+cat TARGETS
+
+# Build to fill the cache
+"${JUST_MR}" ${JUST_MR_ARGS} build ${BUILD_ARGS} \
+          -D '{"ENV": {"TOOLS": "'${TOOLS_DIR}'"}}' 2>&1
+
+# Demonstrate that from now on, we don't build anything any more
+rm -rf "${TOOLS_DIR}"
+
+# Demonstrate that we can build the export target without any cached actions
+rm -rf ${LBR}/protocol-dependent/generation-*/*/ac
+
+# collect garbage
+"${JUST_MR}" ${JUST_MR_ARGS} gc --local-build-root ${LBR} 2>&1
+
+# Use the export
+"${JUST_MR}" ${JUST_MR_ARGS} build ${BUILD_ARGS} \
+          -D '{"ENV": {"TOOLS": "'${TOOLS_DIR}'"}}' 2>&1
+
+# collect garbage again
+"${JUST_MR}" ${JUST_MR_ARGS} gc --local-build-root ${LBR} 2>&1
+
+# Verify that the export target is fully in cache
+"${JUST_MR}" ${JUST_MR_ARGS} install ${BUILD_ARGS} -o "${OUT}" \
+          -D '{"ENV": {"TOOLS": "'${TOOLS_DIR}'"}}' 2>&1
+ls -R "${OUT}"
+test -f "${OUT}/out/hello/world/tree/hello.txt"
+test -f "${OUT}/out/hello/world/tree/name.txt"
+test "$(cat "${OUT}/out/hello/world/tree/name.txt")" = "World"
+
+# check if all files in generation 0 have been linked and not copied
+readonly NON_LINKED_FILES=$(find ${LBR}/protocol-dependent/generation-0 -type f -exec sh -c 'test $(stat -c %h {}) != 2' \; -print)
+echo
+echo "Files with link count!=2:"
+echo "${NON_LINKED_FILES:-"<none>"}"
+echo
+test -z "${NON_LINKED_FILES}"
+
+echo OK