Switch glib to overlay convention

.orchestra/config/components.yml

 #@ load("@ytt:template", "template")
 #@ load("@ytt:data", "data")
 
-#@ load("/components/glib.lib.yml", "glib_component")
 #@ load("/components/glibc.lib.yml", "glibc_component")
 #@ load("/components/qemu.lib.yml", "qemu_component")
 #@ load("/components/revng.lib.yml", "revng_component")
@@ -34,7 +33,6 @@
 
 #@ load("/global_options.lib.yml", "options")
 components:
-  glib: #@ glib_component
   glibc: #@ glibc_component
   qemu: #@ qemu_component
   revng: #@ revng_component

.orchestra/config/components/glib.lib.yml

-#@ load("/lib/ninja.lib.yml", "ninja")
-
-#@ load("/global_options.lib.yml", "options")
-
-#@ source_url = "https://download.gnome.org/sources/glib/2.64/glib-2.64.5.tar.xz"
-
-#@yaml/text-templated-strings
----
-#@ def _glib_component():
-builds:
-  default:
-    configure: |
-      mkdir -p "$BUILD_DIR/source"
-      extract.sh --into "$BUILD_DIR/source" (@= source_url @)
-      find "$BUILD_DIR/source/" -name meson.build -exec sed -i "s|install\s*:\s*|install_rpath : '$RPATH_PLACEHOLDER/lib', \0|" {} \;
-      sed -i 's|^.*HAVE_LANGINFO_.*1.*$||' "$BUILD_DIR/source/meson.build"
-      sed -i -e '/subdir.*tests/d' "$BUILD_DIR"/source/{.,gio,glib}/meson.build
-
-      CC=clang \
-      CXX=clang++ \
-      meson setup \
-        --buildtype plain \
-        --libdir=lib \
-        --prefix "$ORCHESTRA_ROOT" \
-        --wrap-mode nodownload \
-        -Ddefault_library=shared \
-        -Dselinux=disabled \
-        -Dxattr=false \
-        -Dlibmount=disabled \
-        -Dinternal_pcre=true \
-        -Dman=false \
-        -Ddtrace=false \
-        -Dsystemtap=false \
-        -Dgtk_doc=false \
-        -Dfam=false \
-        -Dinstalled_tests=false \
-        -Dnls=disabled \
-        -Dc_args="(@= options["use_old_glibc_cflags"] @) -w" \
-        -Dc_link_args="(@= options["use_old_glibc_lflags"] @) -L$ORCHESTRA_ROOT/lib -fuse-ld=gold -Wl,-z,origin -Wl,--enable-new-dtags -Wl,-rpath,$RPATH_PLACEHOLDER/lib" \
-        "$BUILD_DIR" \
-        "$BUILD_DIR/source"
-    install: |
-      cd "$BUILD_DIR"
-      export LANG=
-      (@= ninja @)
-      (@= ninja @) install
-    dependencies:
-      - clang-release
-      - libffi
-      - zlib
-#@ end
-
----
-
-#@ glib_component = _glib_component()

.orchestra/config/components/glib.yml

+#@ load("@ytt:overlay", "overlay")
+#@ load("/lib/create_component.lib.yml", "single_build_component")
+#@ load("/lib/ninja.lib.yml", "ninja")
+
+#@ load("/global_options.lib.yml", "options")
+
+#@ source_url = "https://download.gnome.org/sources/glib/2.64/glib-2.64.5.tar.xz"
+
+#@yaml/text-templated-strings
+---
+#@ def _glib_args():
+configure: |
+  mkdir -p "$BUILD_DIR/source"
+  extract.sh --into "$BUILD_DIR/source" (@= source_url @)
+  find "$BUILD_DIR/source/" -name meson.build -exec sed -i "s|install\s*:\s*|install_rpath : '$RPATH_PLACEHOLDER/lib', \0|" {} \;
+  sed -i 's|^.*HAVE_LANGINFO_.*1.*$||' "$BUILD_DIR/source/meson.build"
+  sed -i -e '/subdir.*tests/d' "$BUILD_DIR"/source/{.,gio,glib}/meson.build
+
+  CC=clang \
+  CXX=clang++ \
+  meson setup \
+    --buildtype plain \
+    --libdir=lib \
+    --prefix "$ORCHESTRA_ROOT" \
+    --wrap-mode nodownload \
+    -Ddefault_library=shared \
+    -Dselinux=disabled \
+    -Dxattr=false \
+    -Dlibmount=disabled \
+    -Dinternal_pcre=true \
+    -Dman=false \
+    -Ddtrace=false \
+    -Dsystemtap=false \
+    -Dgtk_doc=false \
+    -Dfam=false \
+    -Dinstalled_tests=false \
+    -Dnls=disabled \
+    -Dc_args="(@= options["use_old_glibc_cflags"] @) -w" \
+    -Dc_link_args="(@= options["use_old_glibc_lflags"] @) -L$ORCHESTRA_ROOT/lib -fuse-ld=gold -Wl,-z,origin -Wl,--enable-new-dtags -Wl,-rpath,$RPATH_PLACEHOLDER/lib" \
+    "$BUILD_DIR" \
+    "$BUILD_DIR/source"
+install: |
+  cd "$BUILD_DIR"
+  export LANG=
+  (@= ninja @)
+  (@= ninja @) install
+dependencies:
+  - clang-release
+  - libffi
+  - zlib
+#@ end
+
+#@overlay/match by=overlay.all, expects=1
+#@overlay/match-child-defaults missing_ok=True
+---
+components:
+  glib: #@ single_build_component(**_glib_args())