Improve makefile, add autogenerated manpages

Makefile

@@ -1,4 +1,4 @@
-.PHONY: all release dev install clean uninstall run run-dialog
+.PHONY: all release dev manpages install clean uninstall run run-dialog
 
 DESTDIR ?= =
 PREFIX ?= /usr/local
@@ -6,17 +6,44 @@ BINDIR ?= $(PREFIX)/bin
 LIBEXECDIR ?= $(PREFIX)/libexec
 SYSCONFDIR ?= $(PREFIX)/etc
 DATADIR ?= $(PREFIX)/share
+MANDIR ?= $(DATADIR)/man
 
 APPLICATIONS_DIR = $(DATADIR)/applications
 CONFIG_DIR = $(SYSCONFDIR)/xdg/bscreensaver
 HELPER_DIR = $(LIBEXECDIR)/bscreensaver
-HELPERS = \
+
+HELPERS := \
 	bscreensaver-dbus-service \
 	bscreensaver-systemd \
 	bscreensaver-dialog-gtk3 \
 	$(NULL)
 
+BINARIES := \
+	bscreensaver \
+	bscreensaver-command \
+	bscreensaver-settings \
+	$(NULL)
+
+TARGETS := \
+	$(BINARIES) \
+	$(HELPERS) \
+	$(NULL)
+
+DEV_OUT = target/debug
+RELEASE_OUT = target/release
+
+SOURCES := $(find . -name '*.rs') $(find . -name Cargo.toml) Cargo.lock
+DEV_TARGETS := $(addprefix $(DEV_OUT),$(TARGETS))
+RELEASE_TARGETS := $(addprefix $(RELEASE_OUT),$(TARGETS))
+
+MANPAGES := \
+	bscreensaver.1.gz \
+	bscreensaver-command.1.gz \
+	$(NULL)
+RELEASE_MANPAGES := $(addprefix $(RELEASE_OUT)/,$(MANPAGES))
+
 INSTALL ?= install
+HELP2MAN ?= help2man
 
 RUST_RELEASE_CHANNEL = nightly
 ifeq ($(RUST_RELEASE_CHANNEL),nightly)
@@ -27,29 +54,43 @@ endif
 
 DEV_LOG_LEVEL = debug
 
-all: release
+all: release manpages
 
-release:
-	HELPER_DIR=$(HELPER_DIR) cargo $(RUST_RELEASE_CHANNEL_ARG) build $(FEATURES_ARGS) --release
+release: $(RELEASE_TARGETS)
 
-dev:
-	HELPER_DIR=target/debug cargo $(RUST_RELEASE_CHANNEL_ARG) build $(FEATURES_ARGS)
+dev: $(DEV_TARGETS)
 
-install: release
-	$(INSTALL) -m 0755 -d $(addprefix $(DESTDIR),$(BINDIR) $(HELPER_DIR) $(CONFIG_DIR) $(APPLICATIONS_DIR))
-	$(INSTALL) -m 0755 target/release/bscreensaver target/release/bscreensaver-command target/release/bscreensaver-settings $(DESTDIR)$(BINDIR)
-	$(INSTALL) -m 0755 $(addprefix target/release/,$(HELPERS)) $(DESTDIR)$(HELPER_DIR)
+manpages: $(RELEASE_MANPAGES)
+
+install: release manpages
+	$(INSTALL) -m 0755 -d $(addprefix $(DESTDIR),$(BINDIR) $(HELPER_DIR) $(CONFIG_DIR) $(APPLICATIONS_DIR) $(MANDIR)/man1)
+	$(INSTALL) -m 0755 $(addprefix $(RELEASE_OUT)/,$(BINARIES)) $(DESTDIR)$(BINDIR)
+	$(INSTALL) -m 0755 $(addprefix $(RELEASE_OUT)/,$(HELPERS)) $(DESTDIR)$(HELPER_DIR)
 	$(INSTALL) -m 0644 bscreensaver.toml.example $(DESTDIR)$(CONFIG_DIR)
 	$(INSTALL) -m 0644 settings/bscreensaver-settings.desktop $(DESTDIR)$(APPLICATIONS_DIR)
+	$(INSTALL) -m 0644 $(RELEASE_MANPAGES) $(DESTDIR)$(MANDIR)/man1
+
+$(DEV_TARGETS): $(SOURCES)
+	HELPER_DIR=target/debug cargo $(RUST_RELEASE_CHANNEL_ARG) build $(FEATURES_ARGS)
+
+$(RELEASE_TARGETS): $(SOURCES)
+	HELPER_DIR=$(HELPER_DIR) cargo $(RUST_RELEASE_CHANNEL_ARG) build $(FEATURES_ARGS) --release
+
+$(RELEASE_OUT)/%.1.gz: $(RELEASE_OUT)/%.1
+	gzip -c -k $< > $@
+
+$(RELEASE_OUT)/%.1: $(RELEASE_TARGETS)
+	$(HELP2MAN) --no-info $(subst .1,,$@) > $@
 
 clean:
 	cargo $(RUST_RELEASE_CHANNEL_ARG) clean
 
 uninstall:
-	rm -f $(addprefix $(DESTDIR),$(BINDIR)/bscreensaver $(BINDIR)/bscreensaver-command $(BINDIR)/bscreensaver-settings $(addprefix $(HELPER_DIR)/,$(HELPERS))) || true
-	rmdir -p $(addprefix $(DESTDIR),$(BINDIR) $(HELPER_DIR) $(APPLICATIONS_DIR)) || true
+	rm -f $(addprefix $(DESTDIR)$(BINDIR),$(BINARIES)) $(addprefix $(HELPER_DIR)/,$(HELPERS))) || true
+	rm -f $(addprefix $(DESTDIR)$(MANDIR)/man1/,$(MANPAGES))
+	rmdir -p $(addprefix $(DESTDIR),$(BINDIR) $(HELPER_DIR) $(APPLICATIONS_DIR) $(MANDIR)/man1) || true
 
-run: dev
+run: $(DEV_TARGETS)
 	BSCREENSAVER_LOCAL_DEV=1 \
 	RUST_BACKTRACE=1 \
 	BSCREENSAVER_LOG=$(DEV_LOG_LEVEL) \

settings/bscreensaver-settings.desktop.in

@@ -2,7 +2,7 @@
 Version=1.0
 Name=Screensaver Settings
 Comment=Customize screensaver settings
-Exec=bscreensaver-settings
+Exec=@BINDIR@/bscreensaver-settings
 Icon=screensaver
 Terminal=false
 StartupNotify=true