build: Switch to sassc for generating style

GTK+ switched from ruby-based sass to c-based sassc for performance
reasons. It makes sense to follow suit, if not to not require two
tools for the same job ...

https://bugzilla.gnome.org/show_bug.cgi?id=783210

configure.ac

@@ -73,7 +73,7 @@ done
 
 AC_SUBST(ENABLED_EXTENSIONS, [$ENABLED_EXTENSIONS])
 
-AC_PATH_PROG([SASS],[sass],[])
+AC_PATH_PROG([SASSC],[sassc],[])
 
 dnl Please keep this sorted alphabetically
 AC_CONFIG_FILES([

data/HACKING

@@ -1,6 +1,6 @@
 To generate the css files, from the project directory:
 
-sass --sourcemap=none --update .
+sassc -a gnome-classic.scss gnome-classic.css
 
 To update the gnome-shell-sass submodule to latest upstream commit:
 git submodule update --rebase

data/Makefile.am

@@ -33,9 +33,9 @@ theme_sources =							\
 	$(NULL)
 
 %.css: %.scss $(theme_sources)
-	@if test -n "$(SASS)"; then \
+	@if test -n "$(SASSC)"; then \
 		if $(AM_V_P); then PS4= set -x; else echo "  GEN      $@"; fi; \
-		$(SASS) --sourcemap=none --update -f -q $<; \
+		$(SASSC) -a $< $@; \
 	fi
 
 gsettings_SCHEMAS = org.gnome.shell.extensions.classic-overrides.gschema.xml

data/gnome-classic.css

@@ -119,6 +119,7 @@ StEntry {
 /* Scrollbars */
 StScrollView.vfade {
   -st-vfade-offset: 68px; }
+
 StScrollView.hfade {
   -st-hfade-offset: 68px; }
 
@@ -153,14 +154,18 @@ StScrollBar {
 /* Check Boxes */
 .check-box StBoxLayout {
   spacing: .8em; }
+
 .check-box StBin {
   width: 24px;
   height: 22px;
   background-image: url("resource:///org/gnome/shell/theme/checkbox-off.svg"); }
+
 .check-box:focus StBin {
   background-image: url("resource:///org/gnome/shell/theme/checkbox-off-focused.svg"); }
+
 .check-box:checked StBin {
   background-image: url("resource:///org/gnome/shell/theme/checkbox.svg"); }
+
 .check-box:focus:checked StBin {
   background-image: url("resource:///org/gnome/shell/theme/checkbox-focused.svg"); }
 
@@ -338,6 +343,7 @@ StScrollBar {
 
 .show-processes-dialog-app-list-item-icon:ltr {
   padding-right: 17px; }
+
 .show-processes-dialog-app-list-item-icon:rtl {
   padding-left: 17px; }
 
@@ -709,9 +715,17 @@ StScrollBar {
     #panel .panel-button .system-status-icon {
       icon-size: 1.09em;
       padding: 0 5px; }
-    .unlock-screen #panel .panel-button, .login-screen #panel .panel-button, .lock-screen #panel .panel-button {
+    .unlock-screen #panel .panel-button,
+    .login-screen #panel .panel-button,
+    .lock-screen #panel .panel-button {
       color: #454f52; }
-      .unlock-screen #panel .panel-button:focus, .unlock-screen #panel .panel-button:hover, .unlock-screen #panel .panel-button:active, .login-screen #panel .panel-button:focus, .login-screen #panel .panel-button:hover, .login-screen #panel .panel-button:active, .lock-screen #panel .panel-button:focus, .lock-screen #panel .panel-button:hover, .lock-screen #panel .panel-button:active {
+      .unlock-screen #panel .panel-button:focus, .unlock-screen #panel .panel-button:hover, .unlock-screen #panel .panel-button:active,
+      .login-screen #panel .panel-button:focus,
+      .login-screen #panel .panel-button:hover,
+      .login-screen #panel .panel-button:active,
+      .lock-screen #panel .panel-button:focus,
+      .lock-screen #panel .panel-button:hover,
+      .lock-screen #panel .panel-button:active {
         color: #454f52; }
   #panel .panel-status-indicators-box,
   #panel .panel-status-menu-box {
@@ -770,6 +784,7 @@ StScrollBar {
 .events-section-title:hover,
 .events-section-title:focus {
   background-color: #fafafa; }
+
 .datemenu-today-button:active,
 .world-clocks-button:active,
 .weather-button:active,
@@ -911,7 +926,7 @@ StScrollBar {
   color: black;
   font-size: 0.7em;
   /* HACK: the label should be baseline-aligned with a 1em label,
-           fake this with some bottom padding */
+                     fake this with some bottom padding */
   padding-bottom: 0.13em; }
 
 .message-secondary-bin > StIcon {
@@ -1216,6 +1231,7 @@ StScrollBar {
 .list-search-result:active,
 .list-search-result:checked {
   background-color: rgba(23, 25, 26, 0.9); }
+
 .search-provider-icon:focus, .search-provider-icon:selected, .search-provider-icon:hover,
 .list-search-result:focus,
 .list-search-result:selected,
@@ -1223,7 +1239,8 @@ StScrollBar {
   background-color: rgba(238, 238, 236, 0.1);
   transition-duration: 200ms; }
 
-.app-well-app:active .overview-icon, .app-well-app:checked .overview-icon,
+.app-well-app:active .overview-icon,
+.app-well-app:checked .overview-icon,
 .app-well-app.app-folder:active .overview-icon,
 .app-well-app.app-folder:checked .overview-icon,
 .show-apps:active .overview-icon,
@@ -1232,7 +1249,10 @@ StScrollBar {
 .grid-search-result:checked .overview-icon {
   background-color: rgba(23, 25, 26, 0.9);
   box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.7); }
-.app-well-app:hover .overview-icon, .app-well-app:focus .overview-icon, .app-well-app:selected .overview-icon,
+
+.app-well-app:hover .overview-icon,
+.app-well-app:focus .overview-icon,
+.app-well-app:selected .overview-icon,
 .app-well-app.app-folder:hover .overview-icon,
 .app-well-app.app-folder:focus .overview-icon,
 .app-well-app.app-folder:selected .overview-icon,
@@ -1660,7 +1680,8 @@ StScrollBar {
   padding: 100px 0px; }
   .login-dialog-user-selection-box .login-dialog-not-listed-label {
     padding-left: 2px; }
-    .login-dialog-not-listed-button:focus .login-dialog-user-selection-box .login-dialog-not-listed-label, .login-dialog-not-listed-button:hover .login-dialog-user-selection-box .login-dialog-not-listed-label {
+    .login-dialog-not-listed-button:focus .login-dialog-user-selection-box .login-dialog-not-listed-label,
+    .login-dialog-not-listed-button:hover .login-dialog-user-selection-box .login-dialog-not-listed-label {
       color: #eeeeec; }
 
 .login-dialog-not-listed-label {
@@ -1710,6 +1731,7 @@ StScrollBar {
 
 .user-widget-label:ltr {
   padding-left: 18px; }
+
 .user-widget-label:rtl {
   padding-right: 18px; }
 
@@ -1837,6 +1859,7 @@ StScrollBar {
 .lg-dialog StEntry {
   selection-background-color: #bbbbbb;
   selected-color: #333333; }
+
 .lg-dialog .shell-link {
   color: #999999; }
   .lg-dialog .shell-link:hover {
@@ -1888,9 +1911,9 @@ StScrollBar {
   background-gradient-end: #e0e0e0;
   border-top-color: #666;
   /* we don't support non-uniform border-colors and
-     use the top border color for any border, so we
-     need to set it even if all we want is a bottom
-     border */
+                             use the top border color for any border, so we
+                             need to set it even if all we want is a bottom
+                             border */
   border-bottom: 1px solid #666;
   app-icon-bottom-clip: 0px; }
   #panel:overview {