Add test verifying git cas is taken into account

2 files changed, 75 insertions, 0 deletions

diff --git a/test/end-to-end/cli/TARGETS b/test/end-to-end/cli/TARGETS
index c9a20eef..2fd9f1cd 100644
--- a/test/end-to-end/cli/TARGETS
+++ b/test/end-to-end/cli/TARGETS
@@ -34,6 +34,12 @@
   , "test": ["git-cas-p.sh"]
   , "deps": [["", "mr-tool-under-test"], ["", "tool-under-test"]]
   }
+, "git cas fallback":
+  { "type": ["end-to-end", "with remote"]
+  , "name": ["git-cas-fallback"]
+  , "test": ["git-cas-fallback.sh"]
+  , "deps": [["", "mr-tool-under-test"], ["", "tool-under-test"]]
+  }
 , "just-mr reporting":
   { "type": ["@", "rules", "shell/test", "script"]
   , "name": ["just-mr-reporting"]
@@ -93,6 +99,7 @@
         , "build -P"
         , "analyse"
         , "git cas -P"
+        , "git cas fallback"
         , "install --archive"
         , "install archived repo"
         , "conflict report"
diff --git a/test/end-to-end/cli/git-cas-fallback.sh b/test/end-to-end/cli/git-cas-fallback.sh
new file mode 100644
index 00000000..5feb0a6b
--- /dev/null
+++ b/test/end-to-end/cli/git-cas-fallback.sh
@@ -0,0 +1,68 @@
+#!/bin/sh
+# Copyright 2025 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="$(pwd)"
+JUST="${ROOT}/bin/tool-under-test"
+JUST_MR="${ROOT}/bin/mr-tool-under-test"
+BUILDROOT="${TEST_TMPDIR}/build-root"
+OUT="${TEST_TMPDIR}/out"
+WRKDIR="${ROOT}/work"
+SRCDIR="${ROOT}/srcs"
+
+# Add a src git repo
+mkdir -p "${SRCDIR}"
+cd "${SRCDIR}"
+mkdir -p src/with/some/deep/directory
+echo 'Hello World' > src/with/some/deep/directory/hello.txt
+
+# Set up a build root from git repo
+mkdir -p "${WRKDIR}"
+cd "${WRKDIR}"
+touch ROOT
+cat > repos.json <<EOF
+{ "repositories":
+  { "":
+    { "repository":
+      {"type": "file", "path": "${SRCDIR}", "pragma": {"to_git": true}}
+    }
+  }
+}
+EOF
+cat repos.json
+echo
+"${JUST_MR}" --norc --local-build-root "${BUILDROOT}" setup > CONF
+echo
+cat CONF
+echo
+cat $(cat CONF)
+echo
+TREE=$(jq -rM '.repositories."".workspace_root[1]' $(cat CONF))
+echo
+echo Tree is ${TREE}
+echo
+
+# Clear local cas, while keeping repositories (and hence git cas)
+"${JUST}" gc --local-build-root "${BUILDROOT}" 2>&1
+"${JUST}" gc --local-build-root "${BUILDROOT}" 2>&1
+
+# Verify that we can access the tree (via the git cas),
+# even if a remote endpoint is provided.
+"${JUST}" install-cas --local-build-root "${BUILDROOT}" \
+          -r  "${REMOTE_EXECUTION_ADDRESS}" "${TREE}::t" -o "${OUT}" 2>&1
+grep World "${OUT}/src/with/some/deep/directory/hello.txt"
+
+echo
+echo OK