archlinux: add post_upgrade

contrib/package/arch/PKGBUILD

@@ -24,7 +24,8 @@ optdepends=("ffmpeg: thumbnails for videos, images (slower) and audio, music tag
             "python-argon2-cffi: hashed passwords in config"
 )
 source=("https://github.com/9001/${pkgname}/releases/download/v${pkgver}/${pkgname}-${pkgver}.tar.gz")
-backup=("etc/${pkgname}/copyparty.conf" )
+backup=("etc/copyparty.conf")
+install=copyparty.install
 sha256sums=("14d590644943c3ed14e21093cce79e06f1ae206adeeda16032d15a7241ff4344")
 
 build() {
@@ -36,12 +37,11 @@ package() {
     cd "${srcdir}/${pkgname}-${pkgver}"
     python -m installer --destdir="$pkgdir" dist/*.whl
 
-    install -dm755 "${pkgdir}/etc/${pkgname}"
     install -Dm755 "bin/prisonparty.sh" "${pkgdir}/usr/bin/prisonparty"
-    install -Dm644 "contrib/systemd/${pkgname}.conf" "${pkgdir}/etc/${pkgname}/copyparty.conf"
+    install -Dm644 "contrib/systemd/${pkgname}.conf" "${pkgdir}/etc/copyparty.conf"
     install -Dm644 "contrib/systemd/${pkgname}@.service" "${pkgdir}/usr/lib/systemd/system/${pkgname}@.service"
     install -Dm644 "contrib/systemd/${pkgname}-user.service" "${pkgdir}/usr/lib/systemd/user/${pkgname}.service"
     install -Dm644 "contrib/systemd/prisonparty@.service" "${pkgdir}/usr/lib/systemd/system/prisonparty@.service"
-    install -Dm644 "contrib/systemd/index.md" "${pkgdir}/var/lib/${pkgname}-jail/README.md"
+    install -Dm644 "contrib/systemd/index.md" "${pkgdir}/var/lib/${pkgname}-jail/srv/README.md"
     install -Dm644 "LICENSE" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
 }

contrib/package/arch/copyparty.install

@@ -0,0 +1,27 @@
+post_upgrade() {
+
+    # v1.20.22 moved the config-file, affecting the system-service only
+    if [[ $(vercmp "$2" 1.20.22) -lt 0 ]]; then
+
+        oldpath="/etc/copyparty/copyparty.conf"
+        newpath="/etc/copyparty.conf"
+
+        echo "==> Migrating config-file from $oldpath to $newpath"
+
+        if [[ ! -f "$oldpath" ]]; then
+            oldpath="$oldpath.pacsave"
+        fi
+
+        if [[ -f "$newpath.pacnew" ]]; then
+            echo "==> WARNING: A config-file already existed in the new location [$newpath]. The existing file will be used as-is."
+
+        elif [[ -f "$oldpath" ]]; then
+            mv -v "$oldpath" "$newpath"
+            rmdir /etc/copyparty 2>/dev/null || true
+        fi
+
+        systemctl cat copyparty@.service | awk '/=PRTY_CONFIG=/ && !/=\/etc\/copyparty.conf/ {exit 1}' || {
+            echo "==> WARNING: The copyparty system-service has been edited by hand since installation, so it will not read config from the new default config path [$newpath]. Please use PRTY_CONFIG=$newpath if that is correct for your setup."
+        }
+    fi
+}