Concatenate files to build a script, then use script as a test

[andy5995]

I'm trying to concatenate two files to make a full script, but I don't know why this isn't working:

newscripts = [
  'fail_restore_files_not_in_waste',
  '01_arg_u',
  'mrl_not_exist',
  'restore_with_wildcard'
  ]

build_test_root = meson.current_build_dir()
RMW_FAKE_HOME = join_paths(build_test_root, 'rmw-tests-home')

cat_prog = find_program('cat')

foreach scriptfoo : newscripts
  concat_fragments = custom_target(
    'concat_fragments',
    command: [ cat_prog, '@INPUT@' ],
    capture: true,
    input: files(
      join_paths(meson.current_source_dir(), 'script-head'),
      join_paths(meson.current_source_dir(), 'fragments', scriptfoo + '.sh')),
    output: scriptfoo + '.sh',
    install: false,
    build_by_default: true
  )

  test(
    scriptfoo,
    files(join_paths(build_test_root, scriptfoo + '.sh')),
    env : {
      'MESON_SOURCE_ROOT': meson.project_source_root(),
      'RMW_FAKE_HOME': RMW_FAKE_HOME,
      'MESON_BUILD_ROOT': meson.project_build_root()
      },
    depends: [main_bin, concat_fragments]
  )
endforeach

The error is

../test/meson.build:38:2: ERROR: File /home/andy/src/rmw-project/rmw/builddir/test/fail_restore_files_not_in_waste.sh does not exist.

I have the target set in the depends field, so I don't know why it's not getting built so the test can run.

[eli-schwartz]

Because files are not built before the meson.build file is parsed. I am not actually sure why you're using files() at all here.

The custom_target "input" kwarg expects a list of things that coerce to files, which includes just using the strings:

input: ['script-head', 'fragments/@[email protected]'.format(scriptfoo)]

Note that the files() function is only permitted to be used for files that already exist before meson is run, so you are not permitted to use it on files in the builddir.

If you're trying to work around the fact that test() doesn't type-check and permit a custom target output as the command, then the bigger problem might be the fact that it isn't executable... So you'd need to pass it as an argument to e.g. find_program('sh'), which does work -- stick sh as the test program and the script as the args.

[andy5995]

I want to concatenate 'script-head' with each script "fragment" in the source tests/fragments directory, and then output each of the concatenated file to the test/ directory under the builddir.

What I have so far: theimpossibleastronaut/rmw#397