Automatically update pkgver using makepkg

Author: j-waters

README.md

@@ -45,6 +45,10 @@ Glob patterns will be expanded by bash when copying the files to the repository.
 
 **Optional** Comma-separated list of types to use when adding aur.archlinux.org to known hosts.
 
+### `update_pkgver`
+
+**Optional** Run `makepkg -od` to update `pkgver`. Requires that the `pkgver()` function defined in the `PKGBUILD` file doesn't required any dependencies other than git. The default value is `false`.
+
 ## Example usage
 
 ```yaml

action.yml

@@ -40,6 +40,10 @@ inputs:
     description: 'Comma-separated list of types to use when adding aur.archlinux.org to known hosts'
     required: false
     default: 'rsa,dsa,ecdsa,ed25519'
+  update_pkgver:
+    description: "Run `makepkg -od` to update `pkgver`. Requires that the `pkgver()` function defined in the `PKGBUILD` file doesn't required any dependencies other than git"
+    required: false
+    default: 'false'
 runs:
   using: 'docker'
   image: 'Dockerfile'

build.sh

@@ -13,6 +13,7 @@ commit_message=$INPUT_COMMIT_MESSAGE
 allow_empty_commits=$INPUT_ALLOW_EMPTY_COMMITS
 force_push=$INPUT_FORCE_PUSH
 ssh_keyscan_types=$INPUT_SSH_KEYSCAN_TYPES
+update_pkgver=$INPUT_UPDATE_PKGVER
 
 assert_non_empty() {
   name=$1
@@ -53,6 +54,21 @@ git config --global user.name "$commit_username"
 git config --global user.email "$commit_email"
 echo '::endgroup::'
 
+echo '::group::Updating pkgver'
+if [ "$update_pkgver" = "true" ]; then
+  echo 'Running `makepkg -od` to update pkgver'
+  mkdir -p /tmp/makepkg
+  cp "$pkgbuild" /tmp/makepkg/PKGBUILD
+  (
+    cd /tmp/makepkg;
+    makepkg -od;
+  )
+  pkgbuild=/tmp/makepkg/PKGBUILD
+else
+  echo 'Not updating pkgver'
+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::'
@@ -75,6 +91,7 @@ cd /tmp/local-repo
 makepkg --printsrcinfo >.SRCINFO
 echo '::endgroup::'
 
+
 echo '::group::Committing files to the repository'
 if [[ -z "$assets" ]]; then
   # When $assets are not set, we can add just PKGBUILD and .SRCINFO