CI: generate PKGBUILD based on the git tag

.github/workflows/release.yml

@@ -9,7 +9,12 @@ jobs:
   aur-publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Generate PKGBUILD
+        run: |
+          deploy/make-pgkbuild ${{ github.ref }} > PKGBUILD
 
       - name: Publish AUR package
         uses: KSXGitHub/[email protected]

PKGBUILD

@@ -1,20 +1,20 @@
 # Maintainer: BartSte [email protected]
 
-pkgname=fzf-help
-pkgver=2.3.0
-pkgrel=1
-pkgdesc="Use fzf to select command line options from --help"
-arch=('any')
-url="https://github.com/BartSte/fzf-help"
-license=('MIT')
-depends=('fzf' 'bat')
-source=("$pkgname::git+https://github.com/BartSte/fzf-help.git")
-md5sums=('SKIP')
-changelog="CHANGELOG.md"
+    pkgname=fzf-help
+    pkgver=0.0.0
+    pkgrel=1
+    pkgdesc="Use fzf to select command line options from --help"
+    arch=('any')
+    url="https://github.com/BartSte/fzf-help"
+    license=('MIT')
+    depends=('fzf' 'bat')
+    source=("$pkgname::git+https://github.com/BartSte/fzf-help.git")
+    md5sums=('SKIP')
+    changelog="CHANGELOG.md"
 
-package() {
-  cd "$srcdir/$pkgname"
-  install -Dm644 LICENCE -t "${pkgdir}/usr/share/licenses/${pkgname}"
-  install -dm755 "${pkgdir}/usr/share/${pkgname}"
-  cp -dr --no-preserve=ownership {src/*,uninstall} "${pkgdir}/usr/share/${pkgname}"
-}
+    package() {
+      cd "$srcdir/$pkgname"
+      install -Dm644 LICENCE -t "${pkgdir}/usr/share/licenses/${pkgname}"
+      install -dm755 "${pkgdir}/usr/share/${pkgname}"
+      cp -dr --no-preserve=ownership {src/*,uninstall} "${pkgdir}/usr/share/${pkgname}"
+    }

deploy/make-pkgbuild

@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+usage="
+Usage: make-pkgbuild <version>
+
+This script emits a PKGBUILD file to stdout.
+
+Options:
+  -h, --help    Show this help message and exit.
+"
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -h|--help)
+            echo "$usage"
+            exit 0
+            ;;
+        *)
+            break
+            ;;
+    esac
+done
+
+if [[ $# -ne 1 ]]; then
+    echo "Error: Invalid number of arguments."
+    echo "$usage"
+    exit 1
+fi
+
+################################################################################
+# Ensure the version is in the format of:
+#   - [0-9]+\.[0-9]+\.[0-9]+
+# A leading 'v' is allowed but is removed, otherwise an error is thrown.
+################################################################################
+assert_version() {
+    local version="$1"
+    if [[ ! "$version" =~ ^v?[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+        echo "Error: Invalid version format: $version" >&2
+        exit 1
+    else
+        sed 's/^v//' <<< "$version"
+    fi
+}
+
+################################################################################
+# Generate
+# The version for the PKGBUILD is read from stdin.
+################################################################################
+generate() {
+    local version
+    version="$(cat -)"
+
+    if [[ -z "$version" ]]; then
+        echo "Error: Version is invalid." >&2
+        exit 1
+    fi
+
+    echo "# Maintainer: BartSte [email protected]
+
+    pkgname=fzf-help
+    pkgver=$version
+    pkgrel=1
+    pkgdesc=\"Use fzf to select command line options from --help\"
+    arch=('any')
+    url=\"https://github.com/BartSte/fzf-help\"
+    license=('MIT')
+    depends=('fzf' 'bat')
+    source=(\"\$pkgname::git+https://github.com/BartSte/fzf-help.git\")
+    md5sums=('SKIP')
+    changelog=\"CHANGELOG.md\"
+
+    package() {
+      cd \"\$srcdir/\$pkgname\"
+      install -Dm644 LICENCE -t \"\${pkgdir}/usr/share/licenses/\${pkgname}\"
+      install -dm755 \"\${pkgdir}/usr/share/\${pkgname}\"
+      cp -dr --no-preserve=ownership {src/*,uninstall} \"\${pkgdir}/usr/share/\${pkgname}\"
+    }"
+}
+
+assert_version "$1" | generate