From 9e7376675dd9422242601fe76dd92f4519e424d8 Mon Sep 17 00:00:00 2001
From: Stoiko Ivanov <s.ivanov@proxmox.com>
Date: Mon, 19 Jun 2023 19:59:32 +0200
Subject: [PATCH] buildsys: make build-dir generation atomic

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
 Makefile | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile
index 886b54b..facc154 100644
--- a/Makefile
+++ b/Makefile
@@ -4,13 +4,14 @@ PACKAGE=proxmox-mailgateway
 
 GITVERSION:=$(shell git rev-parse HEAD)
 
+BUILDDIR=$(PACKAGE)-$(DEB_VERSION)
+
 DEB=$(PACKAGE)_$(DEB_VERSION_UPSTREAM_REVISION)_all.deb
 CT_DEB=$(PACKAGE)-container_$(DEB_VERSION_UPSTREAM_REVISION)_all.deb
 HEADER_DEB=pve-headers_$(DEB_VERSION_UPSTREAM_REVISION)_all.deb
 
 DEBS=$(DEB) $(CT_DEB) $(HEADER_DEB)
 
-BUILD_DIR=build
 
 ARCH=amd64
 
@@ -18,12 +19,16 @@ all: $(DEB)
 
 .PHONY: deb
 deb $(CT_DEB) $(HEADER_DEB): $(DEB)
-$(DEB): debian
-	rm -rf $(BUILD_DIR)
-	mkdir -p $(BUILD_DIR)/debian
-	cp -ar debian/* $(BUILD_DIR)/debian/
-	echo "git clone git://git.proxmox.com/git/proxmox-mailgateway.git\\ngit checkout $(GITVERSION)" > $(BUILD_DIR)/debian/SOURCE
-	cd $(BUILD_DIR); dpkg-buildpackage -b -uc -us
+
+$(BUILDDIR): debian
+	rm -rf $@ $@.tmp
+	mkdir -p $@.tmp/debian
+	cp -a debian/ $@.tmp/
+	echo "git clone git://git.proxmox.com/git/proxmox-mailgateway.git\\ngit checkout $(GITVERSION)" > $@.tmp/debian/SOURCE
+	mv $@.tmp $@
+
+$(DEB): $(BUILDDIR)
+	cd $(BUILDDIR); dpkg-buildpackage -b -uc -us
 	lintian $(DEBS)
 
 .PHONY: upload
@@ -31,5 +36,5 @@ upload: $(DEBS)
 	tar cf - $(DEBS)|ssh -X repoman@repo.proxmox.com -- upload --product pmg --dist bullseye --arch $(ARCH)
 
 clean:
-	rm -rf $(BUILD_DIR) *.deb *.buildinfo *.changes
+	rm -rf $(PACKAGE)-[0-9]*/ *.deb *.buildinfo *.changes
 	find . -name '*~' -exec rm {} ';'