Allow setting a custom theme inheritance

This adds a prepare() function which will edit the "Inherits=" line from
the "index.theme" file if the "_inherits" variable is not empty.

Patch based on a suggestion by TrialnError <autumn-wind@web.de>

2 files changed, 27 insertions, 5 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 44d2b2b94ec4..d04828e41a1d 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,13 +1,13 @@
 pkgbase = vertex-icons-git
 	pkgdesc = A Gnome icon theme to match the Vertex Gtk theme
 	pkgver = r16.f27e47e
-	pkgrel = 2
+	pkgrel = 3
 	url = https://github.com/horst3180/Vertex-Icons/
 	install = vertex-icons-git.install
 	arch = any
 	license = GPL
-	depends = moka-icon-theme-git
-	depends = faba-mono-icons-git
+	optdepends = moka-icon-theme-git: Default fall-back icon theme
+	optdepends = faba-mono-icons-git: Default fall-back icon theme
 	source = vertex-icons-git::git://github.com/horst3180/Vertex-Icons.git
 	sha512sums = SKIP
 
diff --git a/PKGBUILD b/PKGBUILD
index fb0b5d12e677..830dea48fcd7 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,10 +1,25 @@
 # Maintainer: Adrián Pérez de Castro <adrian@perezdecastro.org>
+
+# Set to non-empty value to change the "Inherits=..." value in
+# the "index.theme"; the value will be inserted as-is in the file.
+# For example the following would make the theme inherit from the
+# "nouveGnome" theme:
+#
+#    _inherits='nouveGnome,hicolor'
+#
+# The default value speficied by the theme is "Moka,gnome,hicolor".
+# Note that most of the time "hicolor" should be always given as
+# last possible fall-back icon theme, as it will be always present.
+#
+_inherits=''
+
 pkgname='vertex-icons-git'
 pkgdesc='A Gnome icon theme to match the Vertex Gtk theme'
 pkgver=r16.f27e47e
-pkgrel=2
+pkgrel=3
 url='https://github.com/horst3180/Vertex-Icons/'
-depends=('moka-icon-theme-git' 'faba-mono-icons-git')
+optdepends=('moka-icon-theme-git: Default fall-back icon theme'
+            'faba-mono-icons-git: Default fall-back icon theme')
 arch=('any')
 license='GPL'
 source=("${pkgname}::git://github.com/horst3180/Vertex-Icons.git")
@@ -19,6 +34,13 @@ pkgver () {
 	)
 }
 
+prepare () {
+	if [[ -n ${_inherits} ]] ; then
+		# Change "Inherits=" line in "index.theme"
+		sed -i "s/^Inherits=.*$/Inherits=${_inherits}/" "${pkgname}/index.theme"
+	fi
+}
+
 package () {
 	cd "${pkgname}"
 	install -dm755 "${pkgdir}/usr/share/icons/Vertex-Icons"