unikernel/duniverse/dune_/test/blackbox-tests/test-cases/dune-cache/config.t

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+Test cache configuration.
+
+Check that old cache configuration format works fine with an old language
+
+  $ cat > config <<EOF
+  > (lang dune 2.1)
+  > (cache enabled)
+  > (cache-transport direct)
+  > (cache-duplication copy)
+  > (cache-trim-period 1h)
+  > (cache-trim-size 1GB)
+  > EOF
+  $ cat > dune-project <<EOF
+  > (lang dune 2.1)
+  > EOF
+  $ cat > dune <<EOF
+  > (rule
+  >   (deps source)
+  >   (targets target)
+  >   (action (copy source target)))
+  > EOF
+  $ cat > source <<EOF
+  > \_o< COIN
+  > EOF
+
+Test that DUNE_CACHE_ROOT can be used to control the cache location
+
+  $ export DUNE_CACHE_ROOT=$PWD/.cache
+
+Build succeeds and the 'copy' mode is respected
+
+  $ dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  1
+
+Switch to the 'hardlink' mode now
+
+  $ cat > config <<EOF
+  > (lang dune 2.1)
+  > (cache enabled)
+  > (cache-transport direct)
+  > (cache-duplication hardlink)
+  > (cache-trim-period 1h)
+  > (cache-trim-size 1GB)
+  > EOF
+
+Build succeeds and the 'hardlink' mode is respected
+
+  $ rm -rf _build/default
+  $ dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  3
+
+Now repeat the tests with the old configuration format but 3.0 language
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-transport direct)
+  > (cache-duplication copy)
+  > (cache-trim-period 1h)
+  > (cache-trim-size 1GB)
+  > EOF
+
+Build fails because 'cache-transport' was deleted
+
+  $ dune build --config-file config target
+  File "$TESTCASE_ROOT/config", line 3, characters 0-24:
+  3 | (cache-transport direct)
+      ^^^^^^^^^^^^^^^^^^^^^^^^
+  Error: 'cache-transport' was deleted in version 3.0 of the dune language.
+  Dune cache now uses only the direct transport mode.
+  [1]
+
+So, we comply and delete it
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-duplication copy)
+  > (cache-trim-period 1h)
+  > (cache-trim-size 1GB)
+  > EOF
+
+Build fails because 'cache-duplication' was renamed
+
+  $ dune build --config-file config target
+  File "$TESTCASE_ROOT/config", line 3, characters 0-24:
+  3 | (cache-duplication copy)
+      ^^^^^^^^^^^^^^^^^^^^^^^^
+  Error: 'cache-duplication' was renamed to 'cache-storage-mode' in the 3.0
+  version of the dune language
+  [1]
+
+So, we comply and rename it.
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-storage-mode copy)
+  > (cache-trim-period 1h)
+  > (cache-trim-size 1GB)
+  > EOF
+
+Build fails because 'cache-trim-period' was deleted
+
+  $ dune build --config-file config target
+  File "$TESTCASE_ROOT/config", line 4, characters 0-22:
+  4 | (cache-trim-period 1h)
+      ^^^^^^^^^^^^^^^^^^^^^^
+  Error: 'cache-trim-period' was deleted in version 3.0 of the dune language.
+  To trim the cache, use the 'dune cache trim' command.
+  [1]
+
+So, we comply and delete it
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-storage-mode copy)
+  > (cache-trim-size 1GB)
+  > EOF
+
+Build fails because 'cache-trim-size' was deleted
+
+  $ dune build --config-file config target
+  File "$TESTCASE_ROOT/config", line 4, characters 0-21:
+  4 | (cache-trim-size 1GB)
+      ^^^^^^^^^^^^^^^^^^^^^
+  Error: 'cache-trim-size' was deleted in version 3.0 of the dune language. To
+  trim the cache, use the 'dune cache trim' command.
+  [1]
+
+So, we comply and delete it
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-storage-mode copy)
+  > EOF
+
+Build succeeds and the 'copy' mode is respected
+
+  $ rm -rf _build/default
+  $ dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  1
+
+Switch to the 'hardlink' mode now
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-storage-mode hardlink)
+  > EOF
+
+Build succeeds and the 'hardlink' mode is respected
+
+  $ rm -rf _build/default
+  $ dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  3
+
+Let's disable the cache
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache disabled)
+  > (cache-storage-mode hardlink)
+  > EOF
+
+Test that in this mode the shared cache directory is not created
+
+  $ rm -rf $DUNE_CACHE_ROOT
+  $ rm -rf _build/default
+  $ dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  1
+  $ dune_cmd exists $DUNE_CACHE_ROOT
+  false
+
+Test that the cache can be enabled via the environment variable
+
+  $ rm -rf _build/default
+  $ DUNE_CACHE=enabled dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  3
+  $ dune_cmd exists $DUNE_CACHE_ROOT
+  true
+
+Test that we can override the environment variable from the command line
+
+  $ rm -rf $DUNE_CACHE_ROOT
+  $ rm -rf _build/default
+  $ DUNE_CACHE=enabled dune build --config-file config target --cache=disabled
+  $ dune_cmd stat hardlinks _build/default/target
+  1
+  $ dune_cmd exists $DUNE_CACHE_ROOT
+  false
+
+Test that we can override the storage mode via the environment variable
+
+  $ cat > config <<EOF
+  > (lang dune 3.0)
+  > (cache enabled)
+  > (cache-storage-mode hardlink)
+  > EOF
+
+  $ rm -rf _build/default
+  $ DUNE_CACHE_STORAGE_MODE=copy dune build --config-file config target
+  $ dune_cmd stat hardlinks _build/default/target
+  1
+
+Test that we can override the environment variable from the command line
+
+  $ rm -rf $DUNE_CACHE_ROOT
+  $ rm -rf _build/default
+  $ DUNE_CACHE_STORAGE_MODE=copy dune build --config-file config target --cache-storage-mode=hardlink
+  $ dune_cmd stat hardlinks _build/default/target
+  3