all::

CGIT_VERSION = v2.1.0
CGIT_SCRIPT_NAME = cgit.cgi
CGIT_SCRIPT_PATH = /var/www/htdocs/cgit
CGIT_DATA_PATH = $(CGIT_SCRIPT_PATH)
CGIT_CONFIG = /etc/cgitrc
CACHE_ROOT = /var/cache/cgit

prefix = /usr/local
libdir = $(prefix)/lib
filterdir = $(libdir)/cgit/filters
docdir = $(prefix)/share/doc/cgit
htmldir = $(docdir)
pdfdir = $(docdir)
mandir = $(prefix)/share/man

SHA1_HEADER = <openssl/sha.h>
GIT_VER = 2.54.0
GIT_URL = https://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.xz

INSTALL = install
COPYTREE = cp -r

# Project layout. Sources live in source/, web assets in assets/, the bundled
# Git tree in libraries/git, and every generated file lands in build/.
SRCDIR   = source
ASSETDIR = assets
GITDIR   = libraries/git
BUILDDIR = build

# The bundled Git tree is two levels down, so the sub-make reaches back to the
# project root with "../../".
TO_ROOT = ../../

# Documentation. The man-page source (*.5.txt) sits at the project root and is
# rendered into build/.
MAN5_TXT = $(wildcard *.5.txt)
MAN_TXT  = $(MAN5_TXT)
DOC_MAN5 = $(patsubst %.txt,$(BUILDDIR)/%,$(MAN5_TXT))
DOC_HTML = $(patsubst %.txt,$(BUILDDIR)/%.html,$(MAN_TXT))
DOC_PDF  = $(patsubst %.txt,$(BUILDDIR)/%.pdf,$(MAN_TXT))

ASCIIDOC = asciidoc
ASCIIDOC_EXTRA =
ASCIIDOC_HTML = xhtml11
ASCIIDOC_COMMON = $(ASCIIDOC) $(ASCIIDOC_EXTRA)
TXT_TO_HTML = $(ASCIIDOC_COMMON) -b $(ASCIIDOC_HTML)

# Reuse Git's platform detection, then let the user override the settings
# above through cgit.conf.
-include $(GITDIR)/config.mak.uname
-include cgit.conf

export CGIT_VERSION CGIT_SCRIPT_NAME CGIT_SCRIPT_PATH CGIT_DATA_PATH CGIT_CONFIG CACHE_ROOT

.SUFFIXES:

all:: cgit

# cgit is compiled inside the bundled Git tree so it can reuse Git's build
# machinery (see source/cgit.mk). Objects and the binary go to build/.
cgit:
	+@$(MAKE) -C $(GITDIR) -f $(TO_ROOT)$(SRCDIR)/cgit.mk \
		$(TO_ROOT)$(BUILDDIR)/cgit $(EXTRA_GIT_TARGETS) NO_CURL=1 NO_OPENSSL=1

sparse:
	+@$(MAKE) -C $(GITDIR) -f $(TO_ROOT)$(SRCDIR)/cgit.mk \
		NO_CURL=1 NO_OPENSSL=1 cgit-sparse

# Building the test suite needs a fully built Git tree for its helpers, hence
# EXTRA_GIT_TARGETS=all.
test: cgit-with-git
	+@$(MAKE) -C tests all

cgit-with-git:
	+@$(MAKE) cgit EXTRA_GIT_TARGETS=all

install: all
	$(INSTALL) -m 0755 -d $(DESTDIR)$(CGIT_SCRIPT_PATH)
	$(INSTALL) -m 0755 $(BUILDDIR)/cgit $(DESTDIR)$(CGIT_SCRIPT_PATH)/$(CGIT_SCRIPT_NAME)
	$(INSTALL) -m 0755 -d $(DESTDIR)$(CGIT_DATA_PATH)
	$(INSTALL) -m 0644 $(ASSETDIR)/cgit.css $(DESTDIR)$(CGIT_DATA_PATH)/cgit.css
	$(INSTALL) -m 0644 $(ASSETDIR)/cgit.js $(DESTDIR)$(CGIT_DATA_PATH)/cgit.js
	$(INSTALL) -m 0644 $(ASSETDIR)/cgit.png $(DESTDIR)$(CGIT_DATA_PATH)/cgit.png
	$(INSTALL) -m 0644 $(ASSETDIR)/favicon.ico $(DESTDIR)$(CGIT_DATA_PATH)/favicon.ico
	$(INSTALL) -m 0644 $(ASSETDIR)/robots.txt $(DESTDIR)$(CGIT_DATA_PATH)/robots.txt
	$(INSTALL) -m 0755 -d $(DESTDIR)$(filterdir)
	$(COPYTREE) extensions/* $(DESTDIR)$(filterdir)

install-doc: install-man install-html install-pdf

install-man: doc-man
	$(INSTALL) -m 0755 -d $(DESTDIR)$(mandir)/man5
	$(INSTALL) -m 0644 $(DOC_MAN5) $(DESTDIR)$(mandir)/man5

install-html: doc-html
	$(INSTALL) -m 0755 -d $(DESTDIR)$(htmldir)
	$(INSTALL) -m 0644 $(DOC_HTML) $(DESTDIR)$(htmldir)

install-pdf: doc-pdf
	$(INSTALL) -m 0755 -d $(DESTDIR)$(pdfdir)
	$(INSTALL) -m 0644 $(DOC_PDF) $(DESTDIR)$(pdfdir)

define rm_f
rm -f $(1)

endef

uninstall:
	rm -f $(DESTDIR)$(CGIT_SCRIPT_PATH)/$(CGIT_SCRIPT_NAME)
	rm -f $(DESTDIR)$(CGIT_DATA_PATH)/cgit.css
	rm -f $(DESTDIR)$(CGIT_DATA_PATH)/cgit.js
	rm -f $(DESTDIR)$(CGIT_DATA_PATH)/cgit.png
	rm -f $(DESTDIR)$(CGIT_DATA_PATH)/favicon.ico
	rm -f $(DESTDIR)$(CGIT_DATA_PATH)/robots.txt
	$(foreach file,$(patsubst extensions/%,%,$(shell find extensions/ ! -type d)), \
		$(call rm_f,$(DESTDIR)$(filterdir)/$(file)))

uninstall-doc: uninstall-man uninstall-html uninstall-pdf

uninstall-man:
	@for i in $(notdir $(DOC_MAN5)); do \
	    rm -fv $(DESTDIR)$(mandir)/man5/$$i; \
	done

uninstall-html:
	@for i in $(notdir $(DOC_HTML)); do \
	    rm -fv $(DESTDIR)$(htmldir)/$$i; \
	done

uninstall-pdf:
	@for i in $(notdir $(DOC_PDF)); do \
	    rm -fv $(DESTDIR)$(pdfdir)/$$i; \
	done

doc: doc-man doc-html doc-pdf
doc-man: doc-man5
doc-man5: $(DOC_MAN5)
doc-html: $(DOC_HTML)
doc-pdf: $(DOC_PDF)

$(DOC_MAN5): $(BUILDDIR)/%.5 : %.5.txt
	@mkdir -p $(BUILDDIR)
	a2x -f manpage -D $(BUILDDIR) $<

$(DOC_HTML): $(BUILDDIR)/%.html : %.txt
	@mkdir -p $(BUILDDIR)
	$(TXT_TO_HTML) -o $@ $<

$(DOC_PDF): $(BUILDDIR)/%.pdf : %.txt
	@mkdir -p $(BUILDDIR)
	a2x -f pdf -D $(BUILDDIR) $<

# Everything generated lives under build/, so cleaning is a single remove.
clean:
	$(RM) -r $(BUILDDIR)

cleanall: clean
	@if test -e $(GITDIR)/Makefile; then $(MAKE) -C $(GITDIR) clean; fi

# Fetch a Git release tarball for builds without the submodule checked out.
get-git:
	mkdir -p $(dir $(GITDIR))
	curl -L $(GIT_URL) | tar -xJf - && rm -rf $(GITDIR) && mv git-$(GIT_VER) $(GITDIR)

tags:
	@mkdir -p $(BUILDDIR)
	find $(SRCDIR) -name '*.[ch]' | xargs ctags -f $(BUILDDIR)/tags

.PHONY: all cgit cgit-with-git sparse test get-git tags
.PHONY: clean cleanall
.PHONY: doc doc-html doc-man doc-man5 doc-pdf
.PHONY: install install-doc install-html install-man install-pdf
.PHONY: uninstall uninstall-doc uninstall-html uninstall-man uninstall-pdf