From 4cb65dddd9289eb28086bddcbf919e3d01e0ad60 Mon Sep 17 00:00:00 2001
From: James Waters <james@jcwaters.co.uk>
Date: Sun, 29 Aug 2021 23:55:28 +0100
Subject: [PATCH 1/2] Get pkgname from pkgbuild

---
 README.md  |  2 +-
 action.yml |  4 ++--
 build.sh   | 20 +++++++++++++++++++-
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 482efd4..9e6b73f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ GitHub Actions to publish AUR package.
 
 ### `pkgname`
 
-**Required** AUR package name.
+**Optional** AUR package name. If not specified the name will be extracted from the PKGBUILD file.
 
 ### `pkgbuild`
 
diff --git a/action.yml b/action.yml
index 56cfdab..9433612 100644
--- a/action.yml
+++ b/action.yml
@@ -6,8 +6,8 @@ branding:
   icon: package
 inputs:
   pkgname:
-    description: 'AUR package name'
-    required: true
+    description: 'AUR package name, extracted from PKGBUILD if not specified'
+    required: false
   pkgbuild:
     description: 'Path to PKGBUILD file'
     required: true
diff --git a/build.sh b/build.sh
index a0a0991..6cb1629 100755
--- a/build.sh
+++ b/build.sh
@@ -23,7 +23,6 @@ assert_non_empty() {
   fi
 }
 
-assert_non_empty inputs.pkgname "$pkgname"
 assert_non_empty inputs.pkgbuild "$pkgbuild"
 assert_non_empty inputs.commit_username "$commit_username"
 assert_non_empty inputs.commit_email "$commit_email"
@@ -53,6 +52,25 @@ git config --global user.name "$commit_username"
 git config --global user.email "$commit_email"
 echo '::endgroup::'
 
+echo '::group::Getting pkgname'
+if [[ -z "$pkgname" ]]; then
+  echo 'Extracting pkgname from PKGBUILD'
+  
+  mkdir -p /tmp/makepkg
+  cp "$pkgbuild" /tmp/makepkg/PKGBUILD
+  info=$(cd /tmp/makepkg; makepkg --printsrcinfo)
+
+  pattern='pkgname = ([a-z0-9@._+-]*)'
+  [[ "$info" =~ $pattern ]]
+
+  pkgname="${BASH_REMATCH[1]}"
+  echo "Got pkgname '$pkgname'"
+else
+  echo "Using pkgname '$pkgname' from argument"
+  assert_non_empty inputs.pkgname "$pkgname"
+fi
+echo '::endgroup::'
+
 echo '::group::Cloning AUR package into /tmp/local-repo'
 git clone -v "https://aur.archlinux.org/${pkgname}.git" /tmp/local-repo
 echo '::endgroup::'

From a0a6df3a94a43b720084a8995a967c21da0cbb7e Mon Sep 17 00:00:00 2001
From: James Waters <james@jcwaters.co.uk>
Date: Mon, 30 Aug 2021 01:48:48 +0100
Subject: [PATCH 2/2] Default value for pkgbuild

---
 README.md  | 2 +-
 action.yml | 3 ++-
 build.sh   | 1 -
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 9e6b73f..2bcdffe 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ GitHub Actions to publish AUR package.
 
 ### `pkgbuild`
 
-**Required** Path to PKGBUILD file. This file is often generated by prior steps.
+**Optional** Path to PKGBUILD file. This file is often generated by prior steps. The default value is './PKGBUILD'
 
 ### `assets`
 
diff --git a/action.yml b/action.yml
index 9433612..6e5ed84 100644
--- a/action.yml
+++ b/action.yml
@@ -10,7 +10,8 @@ inputs:
     required: false
   pkgbuild:
     description: 'Path to PKGBUILD file'
-    required: true
+    default: './PKGBUILD'
+    required: false
   assets:
     description: 'Newline-separated glob patterns for additional files to be added to the AUR repository'
     required: false
diff --git a/build.sh b/build.sh
index 6cb1629..b8adf7c 100755
--- a/build.sh
+++ b/build.sh
@@ -23,7 +23,6 @@ assert_non_empty() {
   fi
 }
 
-assert_non_empty inputs.pkgbuild "$pkgbuild"
 assert_non_empty inputs.commit_username "$commit_username"
 assert_non_empty inputs.commit_email "$commit_email"
 assert_non_empty inputs.ssh_private_key "$ssh_private_key"