Add a test verifying the reproducibility of the archive

2 files changed, 117 insertions, 1 deletions

diff --git a/test/end-to-end/cli/TARGETS b/test/end-to-end/cli/TARGETS
index ae96d466..2d095530 100644
--- a/test/end-to-end/cli/TARGETS
+++ b/test/end-to-end/cli/TARGETS
@@ -43,6 +43,14 @@
     [["end-to-end", "tool-under-test"], ["end-to-end", "mr-tool-under-test"]]
   , "keep": ["log/warning.txt"]
   }
+, "install --archive":
+  { "type": ["@", "rules", "shell/test", "script"]
+  , "name": ["install-archive"]
+  , "test": ["install-archive.sh"]
+  , "deps":
+    [["end-to-end", "tool-under-test"], ["end-to-end", "mr-tool-under-test"]]
+  , "keep": ["src.tar", "reconstructed.tar", "fromstdout.tar"]
+  }
 , "TESTS":
   { "type": "install"
   , "tainted": ["test"]
@@ -50,7 +58,14 @@
   , "deps":
     { "type": "++"
     , "$1":
-      [ ["defaults", "pwd", "install", "build -P", "analyse", "git cas -P"]
+      [ [ "defaults"
+        , "pwd"
+        , "install"
+        , "build -P"
+        , "analyse"
+        , "git cas -P"
+        , "install --archive"
+        ]
       , { "type": "if"
         , "cond": {"type": "var", "name": "TEST_BOOTSTRAP_JUST_MR"}
         , "then": []
diff --git a/test/end-to-end/cli/install-archive.sh b/test/end-to-end/cli/install-archive.sh
new file mode 100644
index 00000000..b3965870
--- /dev/null
+++ b/test/end-to-end/cli/install-archive.sh
@@ -0,0 +1,101 @@
+#!/bin/sh
+# Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eu
+
+ROOT=$(pwd)
+JUST="${ROOT}/bin/tool-under-test"
+JUST_MR="${ROOT}/bin/mr-tool-under-test"
+BUILD_ROOT_A="${TEST_TMPDIR}/build-root-A"
+BUILD_ROOT_B="${TEST_TMPDIR}/build-root-B"
+BUILD_ROOT_C="${TEST_TMPDIR}/build-root-C"
+
+
+mkdir -p src
+echo simple file > src/foo.txt
+(cd src && ln -s foo symlink)
+mkdir -p src/foo/bar
+echo another file > src/foo/bar/data.txt
+
+echo
+TREE=$("${JUST}" add-to-cas --local-build-root "${BUILD_ROOT_A}" src)
+echo "Source tree is ${TREE}"
+echo
+
+# Generate archive and verify it has the correct content
+"${JUST}" install-cas --local-build-root "${BUILD_ROOT_A}" \
+          --archive -o src.tar "${TREE}::t" 2>&1
+mkdir src.unpacked
+(cd src.unpacked && tar xvf ../src.tar 2>&1)
+diff -ruN src src.unpacked
+
+# clean up no longer needed directories
+rm -rf src src.unpacked
+
+# On a new build root, add the archive
+ARCHIVE=$("${JUST}" add-to-cas --local-build-root "${BUILD_ROOT_B}" src.tar)
+echo
+echo Archive has content "${ARCHIVE}"
+echo
+
+# Verify that we can create the original tree from that archive
+mkdir work
+cd work
+touch ROOT
+cat > repos.json <<EOF
+{ "repositories":
+  { "":
+    { "repository":
+      { "type": "archive"
+      , "content": "${ARCHIVE}"
+      , "fetch": "https://example.org/v1.2.3.tar"
+      }
+    , "target_root": "targets"
+    }
+  , "targets": {"repository": {"type": "file", "path": "."}}
+  }
+}
+EOF
+cat repos.json
+echo
+cat > TARGETS <<'EOF'
+{"": {"type": "install", "dirs": [[["TREE", null, "."], "."]]}}
+EOF
+CONF="$("${JUST_MR}" --norc --local-build-root "${BUILD_ROOT_B}" setup)"
+echo
+echo configuration $CONF
+cat $CONF
+echo
+RECONSTRUCTED_TREE=$(jq -r '.repositories."".workspace_root[1]' "${CONF}")
+[ "${RECONSTRUCTED_TREE}" = "${TREE}" ]
+
+# Build to get the tree unconditionally known to the local build root
+"${JUST}" build --local-build-root "${BUILD_ROOT_B}" -C "${CONF}" 2>&1
+
+# - installing the the tree as archive should give the same fiel
+"${JUST}" install-cas --local-build-root "${BUILD_ROOT_B}" \
+          -o "${ROOT}/reconstructed.tar" --archive "${TREE}::t" 2>&1
+cmp "${ROOT}/src.tar" "${ROOT}/reconstructed.tar" 2>&1
+
+# - dumping the tree as archive to stdout also gives the same archive
+"${JUST}" install-cas --local-build-root "${BUILD_ROOT_B}" \
+          --archive "${TREE}::t" > "${ROOT}/fromstdout.tar"
+cmp "${ROOT}/src.tar" "${ROOT}/fromstdout.tar" 2>&1
+
+# - hashing the archive again gives the original value
+ARCHIVE_NEWLY_HASHED=$("${JUST}" add-to-cas --local-build-root "${BUILD_ROOT_C}" "${ROOT}/fromstdout.tar")
+[ "${ARCHIVE_NEWLY_HASHED}" = "${ARCHIVE}" ]
+
+echo OK