Makefile

SCRIPT_NAME := esh

DESTDIR := /
prefix := /usr/local
bindir := $(prefix)/bin
mandir := $(prefix)/share/man

ASCIIDOCTOR := asciidoctor
SED := sed
SHA1SUM := sha1sum

ifeq ($(shell uname -s),Darwin)
	SED := gsed
	SHA1SUM := shasum -a 1
endif

# The default target.
all: help

#: Update version in the script and README.adoc to $VERSION.
bump-version:
	test -n "$(VERSION)"  # $$VERSION
	$(SED) -E -i "s/^(readonly VERSION)=.*/\1='$(VERSION)'/" $(SCRIPT_NAME)
	$(SED) -E -i "s/^(:version:).*/\1 $(VERSION)/" README.adoc

#: Clean all temporary files.
clean:
	rm -f $(SCRIPT_NAME).1
	find tests -name '*.err' -delete

#: Install the script and man page into $DESTDIR/$prefix.
install: install-exec install-man

#: Install the script into $DESTDIR/$bindir.
install-exec:
	mkdir -p $(DESTDIR)$(bindir)
	install -m 755 $(SCRIPT_NAME) $(DESTDIR)$(bindir)/$(SCRIPT_NAME)

#: Install the man page into $DESTDIR/$mandir/man1.
install-man: $(SCRIPT_NAME).1
	mkdir -p $(DESTDIR)$(mandir)/man1
	install -m 644 $(SCRIPT_NAME).1 $(DESTDIR)$(mandir)/man1/$(SCRIPT_NAME).1

#: Generate a man page (requires asciidoctor).
man: $(SCRIPT_NAME).1

#: Update variable :script-sha1: in README.adoc with SHA1 checksum of the script.
readme-update-checksum:
	$(SED) -E -i \
		-e "s/^(:script-sha1:).*/\1 $(shell $(SHA1SUM) $(SCRIPT_NAME) | cut -d ' ' -f 1)/" \
		README.adoc

#: Bump version to $VERSION, create release commit and tag.
release: .check-git-clean | bump-version readme-update-checksum
	test -n "$(VERSION)"  # $$VERSION
	git add .
	git commit -m "Release version $(VERSION)"
	git tag -s v$(VERSION) -m v$(VERSION)

#: Run tests.
test:
	@./tests/run-tests

#: Print list of targets.
help:
	@printf '%s\n\n' 'List of targets:'
	@$(SED) -En '/^#:.*/{ N; s/^#: (.*)\n([A-Za-z0-9_-]+).*/\2 \1/p }' $(MAKEFILE_LIST) \
		| while read label desc; do printf '%-30s %s\n' "$$label" "$$desc"; done


# Convert a man page.
$(SCRIPT_NAME).1: $(SCRIPT_NAME).1.adoc
	$(ASCIIDOCTOR) -b manpage $(SCRIPT_NAME).1.adoc

# Target for compatibility with GNU convention.
install-data: install-man

.check-git-clean:
	@test -z "$(shell git status --porcelain)" \
		|| { echo 'You have uncommitted changes!' >&2; exit 1; }

.PHONY: all bump-version clean install install-data install-exec install-man man \
	readme-update-checksum release test help .check-git-clean