compose download link from meta-data

With the information available from the API JSON, the URL to find the
content archive at can be automatically composed, saving a manual
modification each update.

As the meta data has to be already available for this to happen, the
composed link cannot be part of the original download and extraction
routine. As prepare is part of this step [1][2], recycling some of
makepkg's internal functions in there closely models what would happen
if the file was included in the original source array.

[1]: https://bugs.archlinux.org/task/42433
[2]: https://git.archlinux.org/pacman.git/commit/?id=c034a3322b2a53fce51ffce144e36361892abeac

1 files changed, 10 insertions, 4 deletions

diff --git a/PKGBUILD b/PKGBUILD
index 0a23448814b1..678f0065fd96 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -10,10 +10,8 @@ url='https://www.opendesktop.org/p/1143475'
 license=('GPL3')
 makedepends=('jq')
 optdepends=('gtk-engine-murrine: for GTK2 themes')
-source=("meta::meta://dl.opendesktop.org/api/files/index?format=json&status=active&collection_content_id=${url##*/}"
-        'https://dl.opendesktop.org/api/files/download/id/1468995652/Dark-Aurora.tar.gz')
-sha256sums=('0f20c0287933ea77e0830d856ff75d6e99c80cf3ba185bda5fd6a662bae049b4'
-            '6fbdaaae2e59b5f514ca003ba2552fcb7eb5724bd278e291ed5ae2036563d6ff')
+source=("meta::meta://dl.opendesktop.org/api/files/index?format=json&status=active&collection_content_id=${url##*/}")
+sha256sums=('0f20c0287933ea77e0830d856ff75d6e99c80cf3ba185bda5fd6a662bae049b4')
 
 # The following is a very convoluted script because of makepkg's DLAGENTS escaping logic.
 # An agent is added for the protocol "meta". It is treated like http, which is done by processing
@@ -31,6 +29,14 @@ meta() {
   jq -j ".$1" meta
 }
 
+prepare() {
+  source=("https://dl.opendesktop.org/api/files/download/id/$(meta id)/Dark-Aurora.tar.xz")
+  sha256sums=('6fbdaaae2e59b5f514ca003ba2552fcb7eb5724bd278e291ed5ae2036563d6ff')
+  download_sources
+  check_source_integrity
+  extract_sources
+}
+
 pkgver() {
   meta version
   while read -rd $'\0'