unikernel/duniverse/dune_/test/blackbox-tests/test-cases/melange/emit-with-runtime-deps.t

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+Test simple interactions between melange.emit and copy_files
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.8)
+  > (using melange 0.1)
+  > EOF
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (alias mel)
+  >  (emit_stdlib false)
+  >  (target output)
+  >  (libraries melange.node)
+  >  (preprocess (pps melange.ppx))
+  >  (runtime_deps assets/file.txt (glob_files_rec ./globbed/*.txt)))
+  > EOF
+
+  $ mkdir assets
+  $ cat > assets/file.txt <<EOF
+  > hello from file
+  > EOF
+  $ mkdir globbed
+  $ echo a.txt > globbed/a.txt
+  $ echo b.txt > globbed/b.txt
+
+  $ cat > main.ml <<EOF
+  > let dirname = [%mel.raw "__dirname"]
+  > let file_path = "./assets/file.txt"
+  > let file_content = Node.Fs.readFileSync (dirname ^ "/" ^ file_path) \`utf8
+  > let () = Js.log file_content
+  > EOF
+
+Rules created for the assets in the output directory
+
+  $ dune build output/assets/file.txt --display=short
+  $ find _build/default/output
+  _build/default/output
+  _build/default/output/assets
+  _build/default/output/assets/file.txt
+  $ dune clean
+
+Alias is found even if source dir "output" isn't present
+
+  $ dune rules @mel | grep file.txt
+  ((deps ((File (In_build_dir _build/default/assets/file.txt))))
+   (targets ((files (_build/default/output/assets/file.txt)) (directories ())))
+   (action (chdir _build/default (copy assets/file.txt output/assets/file.txt))))
+
+  $ dune build @mel
+
+The runtime_dep index.txt was copied to the build folder
+
+  $ ls _build/default/
+  assets
+  globbed
+  main.ml
+  main.pp.ml
+  output
+  $ ls _build/default/output
+  assets
+  globbed
+  main.js
+  node_modules
+
+  $ dune build output/assets/file.txt --display=short
+  $ ls _build/default/output
+  assets
+  globbed
+  main.js
+  node_modules
+  $ ls _build/default/output/globbed
+  a.txt
+  b.txt
+
+  $ node _build/default/output/main.js
+  hello from file
+  
+