build: add bash completion and uninstall target

Install a bash completion script that delegates to the pw binary
itself. Also add an uninstall target and derive unitdir/datadir
from the prefix variable so they stay consistent when prefix is
overridden. Drop the nginx config from the install target since
it requires manual editing before use.

Signed-off-by: Robin Jarry <robin@jarry.cc>

Author: rjarry

Makefile

@@ -24,16 +24,25 @@ pw: $(src)
 
 prefix ?= /usr
 sysconfdir ?= /etc
-unitdir ?= /usr/lib/systemd/system
+unitdir ?= $(prefix)/lib/systemd/system
+datadir ?= $(prefix)/share
 
 .PHONY: install
 install: pw
 	install -Dm755 pw $(DESTDIR)$(prefix)/bin/pw
 	install -Dm644 etc/pw-http.service $(DESTDIR)$(unitdir)/pw-http.service
 	install -Dm644 etc/pw-ingress.service $(DESTDIR)$(unitdir)/pw-ingress.service
-	install -Dm644 etc/nginx.conf $(DESTDIR)$(sysconfdir)/nginx/conf.d/patchwork.conf
+	install -Dm644 etc/pw.bash-completion $(DESTDIR)$(datadir)/bash-completion/completions/pw
 	$(DESTDIR)$(prefix)/bin/pw config > $(DESTDIR)$(sysconfdir)/patchwork.toml
 
+.PHONY: uninstall
+uninstall:
+	rm -f $(DESTDIR)$(prefix)/bin/pw
+	rm -f $(DESTDIR)$(unitdir)/pw-http.service
+	rm -f $(DESTDIR)$(unitdir)/pw-ingress.service
+	rm -f $(DESTDIR)$(datadir)/bash-completion/completions/pw
+	rm -f $(DESTDIR)$(sysconfdir)/patchwork.toml
+
 PYTHON ?= python3
 
 .PHONY: docs

etc/pw.bash-completion

@@ -0,0 +1,7 @@
+#!/bin/bash
+# Patchwork - automated patch tracking system
+# Copyright (C) The Patchwork Contributors (see CONTRIBUTORS)
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+complete -C pw pw