1 files changed, 105 insertions, 0 deletions
diff --git a/test/end-to-end/built-in-rules/export_counting.sh b/test/end-to-end/built-in-rules/export_counting.sh
new file mode 100644
index 00000000..93564434
--- /dev/null
+++ b/test/end-to-end/built-in-rules/export_counting.sh
@@ -0,0 +1,105 @@
+#!/bin/bash
+# Copyright 2024 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="${TMPDIR}/local-build-root"
+readonly LOG="${TMPDIR}/log.txt"
+
+touch ROOT
+cat <<'EOF' > repos.json
+{ "repositories":
+  { "":
+    {"repository": {"type": "file", "path": ".", "pragma": {"to_git": true}}}
+  }
+}
+EOF
+
+cat <<'EOF' > TARGETS
+{ "greeting":
+  { "type": "generic"
+  , "arguments_config": ["NAME"]
+  , "outs": ["greeting.txt"]
+  , "cmds":
+    [ { "type": "join"
+      , "$1":
+        [ { "type": "join_cmd"
+          , "$1":
+            [ "echo"
+            , "Hello"
+            , {"type": "var", "name": "NAME", "default": "world"}
+            ]
+          }
+        , " > greeting.txt"
+        ]
+      }
+    ]
+  }
+, "exported":
+  {"type": "export", "flexible_config": ["NAME"], "target": "greeting"}
+, "world":
+  { "type": "configure"
+  , "target": "exported"
+  , "config":
+    { "type": "let*"
+    , "bindings": [["NAME", "World"], ["unrelated", "foo"]]
+    , "body": {"type": "env", "vars": ["NAME", "unrelated"]}
+    }
+  }
+, "world-2":
+  { "type": "configure"
+  , "target": "exported"
+  , "config":
+    { "type": "let*"
+    , "bindings": [["NAME", "World"], ["unrelated", "bar"]]
+    , "body": {"type": "env", "vars": ["NAME", "unrelated"]}
+    }
+  }
+, "universe":
+  { "type": "configure"
+  , "target": "exported"
+  , "config":
+    { "type": "let*"
+    , "bindings": [["NAME", "Universe"], ["unrelated", "foo"]]
+    , "body": {"type": "env", "vars": ["NAME", "unrelated"]}
+    }
+  }
+, "":
+  { "type": "install"
+  , "files": {"world": "world", "world-2": "world-2", "universe": "universe"}
+  }
+}
+EOF
+
+# The export target is analysed in 3 configuration, but only two
+# are different in the relevant part of the configuration; so
+# we should see two uncached export targets.
+"${JUST_MR}" --just "${JUST}" --local-build-root "${LBR}" \
+             build -f "${LOG}" --log-limit 4 2>&1
+echo
+grep 'xport.*2 uncached' "${LOG}"
+echo
+
+# After building once, the export targets should be cached.
+"${JUST_MR}" --just "${JUST}" --local-build-root "${LBR}" \
+             build -f "${LOG}" --log-limit 4 2>&1
+echo
+grep 'xport.*2 cached' "${LOG}"
+echo
+
+echo OK