Convert pylint to a meson feature

Enable by default if it's found.

.gitlab-ci.yml

@@ -60,7 +60,7 @@ build_stable:
         --fatal-meson-warnings
         --warnlevel 2
         -Dgtk_doc=true
-        -Dpylint=true
+        -Dpylint=enabled
         -Dmanpage=enabled
         -Db_coverage=true
         _build

meson.build

@@ -49,8 +49,8 @@ gnome = import('gnome')
 add_global_arguments('-D_GNU_SOURCE=1', language: 'c')
 add_global_arguments(common_cflags, language: 'c')
 
-if get_option('pylint')
-    pylint = find_program('pylint-3', 'pylint3', 'pylint', required: true)
+pylint = find_program('pylint-3', 'pylint3', 'pylint', required: get_option('pylint'))
+if pylint.found()
     nomalloc = environment({'MALLOC_PERTURB_': '0'})
     pylint_flags = ['-d', 'C0116', '-d', 'C0114', '-d', 'W0707', '-d', 'W0706' ]
 endif

meson_options.txt

@@ -7,8 +7,8 @@ option('gtk_doc',
        value: false,
        description: 'Build docs')
 option('pylint',
-       type: 'boolean',
-       value: false,
+       type: 'feature',
+       value: 'auto',
        description: 'Run pylint checks, for developers only')
 option('tests',
        description: 'Whether to run tests',

src/meson.build

@@ -108,7 +108,7 @@ powerprofilesctl = files('powerprofilesctl')
 install_data(powerprofilesctl,
              install_dir: get_option('bindir')
 )
-if get_option('pylint')
+if pylint.found()
   test('pylint-powerprofilesctl',
        pylint,
        args: pylint_flags + [ powerprofilesctl ],

tests/meson.build

@@ -76,7 +76,7 @@ foreach ut: unit_tests
         )
 endforeach
 
-if get_option('pylint')
+if pylint.found()
   integration_pylint_flags = ['-d', 'W0511', '-d', 'C0302'] + pylint_flags
   test('pylint-integration-tests',
        pylint,