Add a test for similar but different exports

Export the same target from different repositories, as well as
an explicit file reference with the same name and verify that
no spourious cache hits occur.

2 files changed, 77 insertions, 0 deletions

diff --git a/test/end-to-end/target-cache/TARGETS b/test/end-to-end/target-cache/TARGETS
index 061fba9b..ffdeea3c 100644
--- a/test/end-to-end/target-cache/TARGETS
+++ b/test/end-to-end/target-cache/TARGETS
@@ -17,6 +17,13 @@
     , "bootstrap-src-staged"
     ]
   }
+, "export-extern":
+  { "type": ["@", "rules", "shell/test", "script"]
+  , "name": ["export-extern"]
+  , "test": ["export-extern.sh"]
+  , "deps":
+    [["end-to-end", "tool-under-test"], ["end-to-end", "mr-tool-under-test"]]
+  }
 , "bootstrap-src-staged":
   {"type": "install", "dirs": [[["@", "src", "", "bootstrap-src"], "src"]]}
 , "TESTS":
diff --git a/test/end-to-end/target-cache/export-extern.sh b/test/end-to-end/target-cache/export-extern.sh
new file mode 100644
index 00000000..f2505e1e
--- /dev/null
+++ b/test/end-to-end/target-cache/export-extern.sh
@@ -0,0 +1,70 @@
+#!/bin/sh
+# Copyright 2022 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 LBRDIR="$TEST_TMPDIR/local-build-root"
+readonly OUT="$TEST_TMPDIR/out"
+
+touch ROOT
+cat > repos.json <<'EOF'
+{ "repositories":
+  { "":
+    { "repository": {"type": "file", "path": "foo", "pragma": {"to_git": true}}
+    , "bindings": {"bar": "bar"}
+    }
+  , "bar":
+    {"repository": {"type": "file", "path": "bar", "pragma": {"to_git": true}}}
+  }
+}
+EOF
+
+mkdir bar
+cat > bar/TARGETS <<'EOF'
+{"it": {"type": "file_gen", "name": "it", "data": "target it in bar"}}
+EOF
+
+mkdir foo
+echo -n 'file it in foo' > foo/it
+cat > foo/TARGETS <<'EOF'
+{ "it": {"type": "file_gen", "name": "it", "data": "target it in foo"}
+, "local": {"type": "export", "target": ["", "it"]}
+, "distant": {"type": "export", "target": ["@", "bar", "", "it"]}
+, "file": {"type": "export", "target": ["FILE", null, "it"]}
+}
+EOF
+
+CONF=$("${JUST_MR}" --local-build-root "${LBRDIR}" setup '')
+
+"${JUST}" install --local-build-root "${LBRDIR}" -C "${CONF}" -o "${OUT}" local 2>&1
+cat ${OUT}/it
+echo
+grep 'target.*foo' ${OUT}/it
+echo
+
+"${JUST}" install --local-build-root "${LBRDIR}" -C "${CONF}" -o "${OUT}" distant 2>&1
+cat ${OUT}/it
+echo
+grep 'target.*bar' ${OUT}/it
+echo
+
+"${JUST}" install --local-build-root "${LBRDIR}" -C "${CONF}" -o "${OUT}" file 2>&1
+cat ${OUT}/it
+echo
+grep 'file.*foo' ${OUT}/it
+echo