unikernel/duniverse/dune_/test/blackbox-tests/test-cases/pkg/opam-package-with-setenv.t

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+Testing the translation of the setenv field of an opam file into the dune lock dir.
+
+  $ . ./helpers.sh
+  $ mkrepo
+
+Make a package with a setenv. We also test all the kinds of env updates here expcept for
+=+= which isn't used at all in the wild. 
+  $ mkpkg with-setenv <<EOF
+  > setenv: [
+  >  [EXPORTED_ENV_VAR = "Hello from the other package!"]
+  >  [prepend_with_trailing_sep := "Prepended with trailing sep"]
+  >  [prepend_without_trailing_sep += "Prepended without trailing sep"]
+  >  [append_without_leading_sep =+ "Appended without leading sep"]
+  >  [append_with_leading_sep =: "Appended with leading sep"]
+  > ]
+  > EOF
+
+Make another package that depends on that and outputs the exported env vars
+  $ mkpkg deps-on-with-setenv <<'EOF'
+  > depends: [ "with-setenv" ]
+  > build: [
+  >  [ "sh" "-c" "echo $EXPORTED_ENV_VAR" ]
+  >  [ "sh" "-c" "echo $prepend_without_trailing_sep" ]
+  >  [ "sh" "-c" "echo $prepend_with_trailing_sep" ]
+  >  [ "sh" "-c" "echo $append_without_leading_sep" ]
+  >  [ "sh" "-c" "echo $append_with_leading_sep" ]
+  > ]
+  > EOF
+  > solve deps-on-with-setenv
+  Solution for dune.lock:
+  - deps-on-with-setenv.0.0.1
+  - with-setenv.0.0.1
+The exported env from the first package should be in the lock dir.
+
+  $ cat dune.lock/with-setenv.pkg
+  (version 0.0.1)
+  
+  (exported_env
+   (= EXPORTED_ENV_VAR "Hello from the other package!")
+   (:= prepend_with_trailing_sep "Prepended with trailing sep")
+   (+= prepend_without_trailing_sep "Prepended without trailing sep")
+   (=+ append_without_leading_sep "Appended without leading sep")
+   (=: append_with_leading_sep "Appended with leading sep"))
+  $ cat dune.lock/deps-on-with-setenv.pkg
+  (version 0.0.1)
+  
+  (build
+   (progn
+    (run sh -c "echo $EXPORTED_ENV_VAR")
+    (run sh -c "echo $prepend_without_trailing_sep")
+    (run sh -c "echo $prepend_with_trailing_sep")
+    (run sh -c "echo $append_without_leading_sep")
+    (run sh -c "echo $append_with_leading_sep")))
+  
+  (depends with-setenv)
+
+When building the second package the exported env vars from the first package should be
+available and all the env updates should be applied correctly.
+
+The output of opam when building the equivalent package is:
+
+Hello from the other package!
+Prepended without trailing sep
+Prepended with trailing sep:
+Appended without leading sep
+:Appended with leading sep
+
+  $ EXPORTED_ENV_VAR="I have not been exported yet." \
+  > prepend_without_trailing_sep="foo:bar" \
+  > prepend_with_trailing_sep="foo:bar" \
+  > append_without_leading_sep="foo:bar" \
+  > append_with_leading_sep="foo:bar" \
+  > build_pkg deps-on-with-setenv 
+  Hello from the other package!
+  Prepended without trailing sep
+  Prepended with trailing sep
+  Appended without leading sep
+  Appended with leading sep
+
+We now make a third package that updates the env in a similar way, in order to see the
+difference between a propagated export_env versus the initial env.
+
+  $ mkpkg with-setenv-2 <<EOF
+  > depends: [ "with-setenv" ]
+  > setenv: [
+  >  [EXPORTED_ENV_VAR = "Hello from the second package!"]
+  >  [prepend_with_trailing_sep := "Prepended 2nd time with sep"]
+  >  [prepend_without_trailing_sep += "Prepended 2nd time without trailing sep"]
+  >  [append_without_leading_sep =+ "Appended 2nd time without leading sep"]
+  >  [append_with_leading_sep =: "Appended 2nd time with leading sep"]
+  > ]
+  > EOF
+  > mkpkg deps-on-with-setenv-2 <<'EOF'
+  > depends: [ "with-setenv-2" ]
+  > build: [
+  >  [ "sh" "-c" "echo $EXPORTED_ENV_VAR" ]
+  >  [ "sh" "-c" "echo $prepend_without_trailing_sep" ]
+  >  [ "sh" "-c" "echo $prepend_with_trailing_sep" ]
+  >  [ "sh" "-c" "echo $append_without_leading_sep" ]
+  >  [ "sh" "-c" "echo $append_with_leading_sep" ]
+  > ]
+  > EOF
+  > solve deps-on-with-setenv-2
+  Solution for dune.lock:
+  - deps-on-with-setenv-2.0.0.1
+  - with-setenv.0.0.1
+  - with-setenv-2.0.0.1
+We can now observe how the environment updates are applied a second time.
+
+We currently have the following issues:
+- The leading and trailing separators are missing.
+- The initial environment is missing.
+- The order of applying environment updates is different from opam's.
+
+The output of opam when building the equivalent package is:
+
+Hello from the other package!
+Prepended without trailing sep:Prepended 2nd time without trailing sep
+Prepended with trailing sep:Prepended 2nd time with sep:
+Appended 2nd time without leading sep:Appended without leading sep
+:Appended 2nd time with leading sep:Appended with leading sep
+
+  $ EXPORTED_ENV_VAR="I have not been exported yet." \
+  > prepend_without_trailing_sep="foo:bar" \
+  > prepend_with_trailing_sep="foo:bar" \
+  > append_without_leading_sep="foo:bar" \
+  > append_with_leading_sep="foo:bar" \
+  > build_pkg deps-on-with-setenv-2
+  Hello from the second package!
+  Prepended 2nd time without trailing sep:Prepended without trailing sep
+  Prepended 2nd time with sep:Prepended with trailing sep
+  Appended without leading sep:Appended 2nd time without leading sep
+  Appended with leading sep:Appended 2nd time with leading sep
+
+