Fix Arch PKGBUILD generation target

Makefile

@@ -15,6 +15,7 @@ ARCH_PKG_DIR ?= packaging/archlinux/keepassgo-git
 ARCH_PKG_TMPL ?= $(ARCH_PKG_DIR)/PKGBUILD.tmpl
 ARCH_PKGBUILD ?= $(ARCH_PKG_DIR)/PKGBUILD
 ARCH_PKGVER ?= $(shell printf 'r%s.%s' "$$(git rev-list --count HEAD 2>/dev/null || echo 0)" "$$(git rev-parse --short HEAD 2>/dev/null || echo dev)")
+ARCH_REPO_DIR ?= $(CURDIR)
 
 GOGIO_SIGN_FLAGS :=
 ifneq ($(strip $(SIGNKEY)),)
@@ -61,8 +62,9 @@ android/keepassgo-android.jar: $(shell find androidsrc -type f | sort)
 			$$(find androidsrc -name '\''*.java'\'' | sort); \
 		"$(JAVA_HOME)/bin/jar" --create --file "$$(pwd)/android/keepassgo-android.jar" -C "$$tmpdir" .'
 
-$(ARCH_PKGBUILD): $(ARCH_PKG_TMPL) Makefile
+archlinux-pkgbuild: $(ARCH_PKG_TMPL) Makefile
 	@mkdir -p "$(ARCH_PKG_DIR)"
-	@sed "s/@PKGVER@/$(ARCH_PKGVER)/g" "$(ARCH_PKG_TMPL)" > "$(ARCH_PKGBUILD)"
-
-archlinux-pkgbuild: $(ARCH_PKGBUILD)
+	@sed \
+		-e 's|@PKGVER@|$(ARCH_PKGVER)|g' \
+		-e 's|@REPO_DIR@|$(ARCH_REPO_DIR)|g' \
+		"$(ARCH_PKG_TMPL)" > "$(ARCH_PKGBUILD)"

packaging/archlinux/keepassgo-git/PKGBUILD.tmpl

@@ -27,13 +27,7 @@ source=('git+https://git.julianfamily.org/joejulian/keepassgo.git')
 sha256sums=('SKIP')
 
 _repo_dir() {
-  if [[ -d "${srcdir}/keepassgo/.git" ]]; then
-    printf '%s\n' "${srcdir}/keepassgo"
-    return
-  fi
-
-  cd "${startdir}/../../.." || exit 1
-  pwd
+  printf '%s\n' "@REPO_DIR@"
 }
 
 pkgver() {