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

[Benjamin Otte <otte src gnome org>]

commit 14404179f93a01ec05f7dd91bb9f8b71aab71020
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   | 34 ++++++++++++++++++----------------
 meson.build       |  1 +
 meson_options.txt |  5 -----
 3 files changed, 19 insertions(+), 21 deletions(-)
---
diff --git a/gtk/meson.build b/gtk/meson.build
index fe0ec456d9..420f144bf4 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -838,25 +838,27 @@ 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() and not get_option('sassc').disabled()
+    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/Adwaita')
-  subdir('theme/HighContrast')
+    subdir('theme/Adwaita')
+    subdir('theme/HighContrast')
 
-  theme_deps = [
-    adwaita_theme_deps,
-    hc_theme_deps,
-  ]
-else
-  theme_deps = []
+    theme_deps += [
+      adwaita_theme_deps,
+      hc_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',