[gtk/wip/otte/build: 74/77] build: Remove sassc option

[Benjamin Otte <otte src gnome org>]

commit af1a8602c57064c75d1b6c6d5cdbb36c26d67c08
Author: Benjamin Otte <otte redhat com>
Date:   Thu Apr 1 21:29:41 2021 +0200

    build: Remove sassc option
    
    Instead, ensure that sassc is made madatory on git builds (because
    it is, we don't ship CSS files anymore) and not even looked for in
    release builds (because do ship CSS files there).

 gtk/meson.build   | 30 ++++++++++++++++--------------
 meson.build       |  1 +
 meson_options.txt |  5 -----
 3 files changed, 17 insertions(+), 19 deletions(-)
---
diff --git a/gtk/meson.build b/gtk/meson.build
index ed6c97617b..41bf499439 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -838,23 +838,25 @@ gtk_gresources_xml = configure_file(output: 'gtk.gresources.xml',
   ],
 )
 
-# Build the theme files
-sassc = find_program('sassc', required: false)
-if not sassc.found() and not get_option('sassc').disabled()
-  subproject('sassc')
-  sassc = find_program('sassc', required: get_option('sassc').enabled())
-endif
+theme_deps = []
+# For git checkouts, but not for tarballs...
+if not fs.exists('theme/Adwaita/Adwaita.css')
+  # ... build the theme files
+  sassc = find_program('sassc', required: false)
+  if not sassc.found()
+    subproject('sassc')
+    sassc = find_program('sassc', required: true)
+  endif
 
-if sassc.found()
-  sassc_opts = [ '-a', '-M', '-t', 'compact' ]
+  if sassc.found()
+    sassc_opts = [ '-a', '-M', '-t', 'compact' ]
 
-  subdir('theme/Default')
+    subdir('theme/Default')
 
-  theme_deps = [
-    default_theme_deps,
-  ]
-else
-  theme_deps = []
+    theme_deps += [
+      default_theme_deps,
+    ]
+  endif
 endif
 
 gtkresources = gnome.compile_resources('gtkresources',
diff --git a/meson.build b/meson.build
index 38d23ed61c..ef956f94a7 100644
--- a/meson.build
+++ b/meson.build
@@ -24,6 +24,7 @@ cloudproviders_req = '>= 0.3.1'
 xkbcommon_req      = '>= 0.2.0'
 sysprof_req        = '>= 3.38.0'
 
+fs = import('fs')
 gnome = import('gnome')
 pkg_config = import('pkgconfig')
 
diff --git a/meson_options.txt b/meson_options.txt
index 744acd33c8..275a912cb8 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -83,11 +83,6 @@ option('colord',
        value: 'disabled',
        description : 'Build colord support for the CUPS printing backend')
 
-option('sassc',
-       type: 'feature',
-       value: 'auto',
-       description: 'Rebuild themes using sassc')
-
 # Documentation and introspection
 
 option('gtk_doc',