########################################################################
# Copyright (C) 2021 Alejandro Colomar <alx.manpages@gmail.com>
# SPDX-License-Identifier: GPL-2.0 OR LGPL-2.0
########################################################################
# Conventions:
#
# - Follow "Makefile Conventions" from the "GNU Coding Standards" closely.
# However, when something could be improved, don't follow those.
# - Uppercase variables, when referring files, refer to files in this repo.
# - Lowercase variables, when referring files, refer to system files.
# - Lowercase variables starting with '_' refer to absolute paths,
# including $(DESTDIR).
# - Uppercase variables starting with '_' refer to temporary files produced
# in $builddir.
# - Variables ending with '_' refer to a subdir of their parent dir, which
# is in a variable of the same name but without the '_'. The subdir is
# named after this project: <*/man>.
# - Variables ending in '_rm' refer to files that can be removed (exist).
# - Variables ending in '_rmdir' refer to dirs that can be removed (exist).
# - Targets of the form '%-rm' remove their corresponding file '%'.
# - Targets of the form '%/.-rmdir' remove their corresponding dir '%/'.
# - Targets of the form '%/.' create their corresponding directory '%/'.
# - Every file or directory to be created depends on its parent directory.
# This avoids race conditions caused by `mkdir -p`. Only the root
# directories are created with parents.
# - The 'FORCE' target is used to make phony some variables that can't be
# .PHONY to avoid some optimizations.
#
########################################################################
MAKEFLAGS += --no-print-directory
MAKEFLAGS += --warn-undefined-variables
srcdir := .
builddir := tmp
DESTDIR :=
prefix := /usr/local
SYSCONFDIR := $(srcdir)/etc
TMACDIR := $(SYSCONFDIR)/groff/tmac
MANDIR := $(srcdir)
MAN0DIR := $(MANDIR)/man0
MAN1DIR := $(MANDIR)/man1
MAN2DIR := $(MANDIR)/man2
MAN3DIR := $(MANDIR)/man3
MAN4DIR := $(MANDIR)/man4
MAN5DIR := $(MANDIR)/man5
MAN6DIR := $(MANDIR)/man6
MAN7DIR := $(MANDIR)/man7
MAN8DIR := $(MANDIR)/man8
datarootdir := $(prefix)/share
docdir := $(datarootdir)/doc
mandir := $(datarootdir)/man
man0dir := $(mandir)/man0
man1dir := $(mandir)/man1
man2dir := $(mandir)/man2
man3dir := $(mandir)/man3
man4dir := $(mandir)/man4
man5dir := $(mandir)/man5
man6dir := $(mandir)/man6
man7dir := $(mandir)/man7
man8dir := $(mandir)/man8
manext := \.[0-9]
man0ext := .0
man1ext := .1
man2ext := .2
man3ext := .3
man4ext := .4
man5ext := .5
man6ext := .6
man7ext := .7
man8ext := .8
htmldir := $(docdir)
htmlext := .html
htmldir_ := $(htmldir)/man
_LINTDIR := $(builddir)/lint
_HTMLDIR := $(builddir)/html
_SRCDIR := $(builddir)/src
_mandir := $(DESTDIR)$(mandir)
_htmldir := $(DESTDIR)$(htmldir_)
clang-tidy_config := $(SYSCONFDIR)/clang-tidy/config.yaml
DEFAULT_CLANG-TIDYFLAGS := --config-file=$(clang-tidy_config)
DEFAULT_CLANG-TIDYFLAGS += --quiet
DEFAULT_CLANG-TIDYFLAGS += --use-color
EXTRA_CLANG-TIDYFLAGS :=
CLANG-TIDYFLAGS := $(DEFAULT_CLANG-TIDYFLAGS) $(EXTRA_CLANG-TIDYFLAGS)
DEFAULT_IWYUFLAGS := -Xiwyu --no_fwd_decls
DEFAULT_IWYUFLAGS += -Xiwyu --error
EXTRA_IWYUFLAGS :=
IWYUFLAGS := $(DEFAULT_IWYUFLAGS) $(EXTRA_IWYUFLAGS)
DEFAULT_CPPFLAGS :=
EXTRA_CPPFLAGS :=
CPPFLAGS := $(DEFAULT_CPPFLAGS) $(EXTRA_CPPFLAGS)
DEFAULT_CFLAGS := -std=gnu17
DEFAULT_CFLAGS += -Wall
DEFAULT_CFLAGS += -Wextra
DEAFULT_CFLAGS += -Wstrict-prototypes
DEFAULT_CFLAGS += -Werror
EXTRA_CFLAGS :=
CFLAGS := $(DEFAULT_CFLAGS) $(EXTRA_CFLAGS)
DEFAULT_LDFLAGS := -Wl,--as-needed
DEFAULT_LDFLAGS += -Wl,--no-allow-shlib-undefined
DEFAULT_LDFLAGS += -Wl,--no-copy-dt-needed-entries
DEFAULT_LDFLAGS += -Wl,--no-undefined
EXTRA_LDFLAGS :=
LDFLAGS := $(DEFAULT_LDFLAGS) $(EXTRA_LDFLAGS)
DEFAULT_LDLIBS := -lc
EXTRA_LDLIBS :=
LDLIBS := $(DEFAULT_LDLIBS) $(EXTRA_LDLIBS)
TMACFILES := $(sort $(shell find $(TMACDIR) -not -type d))
TMACNAMES := $(basename $(notdir $(TMACFILES)))
GROFF_CHECKSTYLE_LVL := 3
DEFAULT_GROFFFLAGS := -man
DEFAULT_GROFFFLAGS += -t
DEFAULT_GROFFFLAGS += -M $(TMACDIR)
DEFAULT_GROFFFLAGS += $(foreach x,$(TMACNAMES),-m $(x))
DEFAULT_GROFFFLAGS += -rCHECKSTYLE=$(GROFF_CHECKSTYLE_LVL)
DEFAULT_GROFFFLAGS += -ww
EXTRA_GROFFFLAGS :=
GROFFFLAGS := $(DEFAULT_GROFFFLAGS) $(EXTRA_GROFFFLAGS)
DEFAULT_MANDOCFLAGS := -man
DEFAULT_MANDOCFLAGS += -Tlint
EXTRA_MANDOCFLAGS :=
MANDOCFLAGS := $(DEFAULT_MANDOCFLAGS) $(EXTRA_MANDOCFLAGS)
DEFAULT_MAN2HTMLFLAGS :=
EXTRA_MAN2HTMLFLAGS :=
MAN2HTMLFLAGS := $(DEFAULT_MAN2HTMLFLAGS) $(EXTRA_MAN2HTMLFLAGS)
INSTALL := install
INSTALL_DATA := $(INSTALL) -m 644
INSTALL_DIR := $(INSTALL) -m 755 -d
MKDIR := mkdir -p
RM := rm
RMDIR := rmdir --ignore-fail-on-non-empty
CLANG-TIDY := clang-tidy
IWYU := iwyu
CC := cc
LD := $(CC) $(CFLAGS)
GROFF := groff
MAN := man
MANDOC := mandoc
MAN2HTML := man2html
MAN_SECTIONS := 0 1 2 3 4 5 6 7 8
.PHONY: all
all:
$(MAKE) uninstall
$(MAKE) install
%/.:
$(info INSTALL $(@D)/)
$(INSTALL_DIR) $(@D)
%-rm:
$(info RM $*)
$(RM) $*
%-rmdir:
$(info RMDIR $(@D))
$(RMDIR) $(@D)
.PHONY: install
install: install-man | installdirs
@:
.PHONY: installdirs
installdirs: | installdirs-man
@:
.PHONY: uninstall remove
uninstall remove: uninstall-man
@:
.PHONY: clean
clean:
$(RM) -rf $(builddir)
########################################################################
# man
MANPAGES := $(sort $(shell find $(MANDIR)/man?/ -type f | grep '$(manext)$$'))
LINTMAN := $(sort $(shell find $(MANDIR)/man?/ -type f | grep '$(manext)$$' \
| xargs grep -l '^\.TH '))
_HTMLPAGES := $(patsubst $(MANDIR)/%,$(_HTMLDIR)/%.html,$(MANPAGES))
_htmlpages := $(patsubst $(_HTMLDIR)/%,$(_htmldir)/%,$(_HTMLPAGES))
_manpages := $(patsubst $(MANDIR)/%,$(_mandir)/%,$(MANPAGES))
_man0pages := $(filter %$(man0ext),$(_manpages))
_man1pages := $(filter %$(man1ext),$(_manpages))
_man2pages := $(filter %$(man2ext),$(_manpages))
_man3pages := $(filter %$(man3ext),$(_manpages))
_man4pages := $(filter %$(man4ext),$(_manpages))
_man5pages := $(filter %$(man5ext),$(_manpages))
_man6pages := $(filter %$(man6ext),$(_manpages))
_man7pages := $(filter %$(man7ext),$(_manpages))
_man8pages := $(filter %$(man8ext),$(_manpages))
_LINT_groff :=$(patsubst $(MANDIR)/%,$(_LINTDIR)/%.lint.groff.touch,$(LINTMAN))
_LINT_mandoc:=$(patsubst $(MANDIR)/%,$(_LINTDIR)/%.lint.mandoc.touch,$(LINTMAN))
_SRCPAGEDIRS:=$(patsubst $(MANDIR)/%,$(_SRCDIR)/%.d,$(LINTMAN))
_UNITS_c :=$(sort $(patsubst $(MANDIR)/%,$(_SRCDIR)/%,$(shell \
find $(MANDIR)/man?/ -type f \
| grep '$(manext)$$' \
| xargs grep -l '^\.TH ' \
| while read m; do \
<$$m \
sed -n "s,^\... SRC BEGIN (\(.*.c\))$$,$$m.d/\1,p"; \
done)))
_UNITS_o := $(patsubst %.c,%.o,$(_UNITS_c))
_UNITS_bin := $(patsubst %.c,%,$(_UNITS_c))
_LINT_clang-tidy := $(patsubst %.c,%.lint.clang-tidy.touch,$(_UNITS_c))
_LINT_iwyu := $(patsubst %.c,%.lint.iwyu.touch,$(_UNITS_c))
MANDIRS := $(sort $(shell find $(MANDIR)/man? -type d))
_HTMLDIRS := $(patsubst $(MANDIR)/%,$(_HTMLDIR)/%/.,$(MANDIRS))
_LINTDIRS := $(patsubst $(MANDIR)/%,$(_LINTDIR)/%/.,$(MANDIRS))
_SRCDIRS := $(patsubst $(MANDIR)/%,$(_SRCDIR)/%/.,$(MANDIRS))
_htmldirs := $(patsubst $(_HTMLDIR)/%,$(_htmldir)/%,$(_HTMLDIRS))
_mandirs := $(patsubst $(MANDIR)/%,$(_mandir)/%/.,$(MANDIRS))
_man0dir := $(filter %man0/.,$(_mandirs))
_man1dir := $(filter %man1/.,$(_mandirs))
_man2dir := $(filter %man2/.,$(_mandirs))
_man3dir := $(filter %man3/.,$(_mandirs))
_man4dir := $(filter %man4/.,$(_mandirs))
_man5dir := $(filter %man5/.,$(_mandirs))
_man6dir := $(filter %man6/.,$(_mandirs))
_man7dir := $(filter %man7/.,$(_mandirs))
_man8dir := $(filter %man8/.,$(_mandirs))
_htmlpages_rm := $(addsuffix -rm,$(wildcard $(_htmlpages)))
_manpages_rm := $(addsuffix -rm,$(wildcard $(_manpages)))
_man0pages_rm := $(filter %$(man0ext)-rm,$(_manpages_rm))
_man1pages_rm := $(filter %$(man1ext)-rm,$(_manpages_rm))
_man2pages_rm := $(filter %$(man2ext)-rm,$(_manpages_rm))
_man3pages_rm := $(filter %$(man3ext)-rm,$(_manpages_rm))
_man4pages_rm := $(filter %$(man4ext)-rm,$(_manpages_rm))
_man5pages_rm := $(filter %$(man5ext)-rm,$(_manpages_rm))
_man6pages_rm := $(filter %$(man6ext)-rm,$(_manpages_rm))
_man7pages_rm := $(filter %$(man7ext)-rm,$(_manpages_rm))
_man8pages_rm := $(filter %$(man8ext)-rm,$(_manpages_rm))
_htmldirs_rmdir := $(addsuffix -rmdir,$(wildcard $(_htmldirs)))
_mandirs_rmdir := $(addsuffix -rmdir,$(wildcard $(_mandirs)))
_man0dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man0dir)))
_man1dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man1dir)))
_man2dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man2dir)))
_man3dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man3dir)))
_man4dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man4dir)))
_man5dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man5dir)))
_man6dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man6dir)))
_man7dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man7dir)))
_man8dir_rmdir := $(addsuffix -rmdir,$(wildcard $(_man8dir)))
_mandir_rmdir := $(addsuffix -rmdir,$(wildcard $(_mandir)/.))
_htmldir_rmdir := $(addsuffix -rmdir,$(wildcard $(_htmldir)/.))
install_manX := $(foreach x,$(MAN_SECTIONS),install-man$(x))
installdirs_manX := $(foreach x,$(MAN_SECTIONS),installdirs-man$(x))
uninstall_manX := $(foreach x,$(MAN_SECTIONS),uninstall-man$(x))
.SECONDEXPANSION:
$(_manpages): $(_mandir)/man%: $(MANDIR)/man% | $$(@D)/.
$(info INSTALL $@)
$(INSTALL_DATA) -T $< $@
$(_mandirs): %/.: | $$(dir %). $(_mandir)/.
$(_mandirs_rmdir): $(_mandir)/man%/.-rmdir: $$(_man%pages_rm) FORCE
$(_mandir_rmdir): $(uninstall_manX) FORCE
.PHONY: $(install_manX)
$(install_manX): install-man%: $$(_man%pages) | installdirs-man%
@:
.PHONY: install-man
install-man: $(install_manX)
@:
.PHONY: $(installdirs_manX)
$(installdirs_manX): installdirs-man%: $$(_man%dir)
@:
.PHONY: installdirs-man
installdirs-man: $(installdirs_manX)
@:
.PHONY: $(uninstall_manX)
$(uninstall_manX): uninstall-man%: $$(_man%pages_rm) $$(_man%dir_rmdir)
@:
.PHONY: uninstall-man
uninstall-man: $(_mandir_rmdir) $(uninstall_manX)
@:
########################################################################
# src
$(_SRCPAGEDIRS): $(_SRCDIR)/%.d: $(MANDIR)/% | $$(@D)/.
$(info MKDIR $@)
$(MKDIR) $@
touch $@
$(_UNITS_c): $$(@D)
$(info SED $@)
<$(patsubst $(_SRCDIR)/%.d,$(MANDIR)/%,$<) \
sed -n \
-e '/^\.TH/,/^\.SH/{/^\.SH/!p}' \
-e '/^\.SH EXAMPLES/p' \
-e "/^\... SRC BEGIN ($(@F))$$/,/^\... SRC END$$/p" \
| $(MAN) -P cat -l - \
| sed '/^[^ ]/d' \
| sed 's/^ //' \
>$@ \
|| exit $$?
$(_UNITS_o): $(_SRCDIR)/%.o: $(_SRCDIR)/%.c
$(info CC $@)
$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
$(_UNITS_bin): $(_SRCDIR)/%: $(_SRCDIR)/%.o
$(info LD $@)
$(LD) $(LDFLAGS) -o $@ $< $(LDLIBS)
$(_SRCDIRS): %/.: | $$(dir %). $(_SRCDIR)/.
.PHONY: build-src src
build-src src: $(_UNITS_c) | builddirs-src
@:
.PHONY: build-cc
build-cc: $(_UNITS_o)
@:
.PHONY: build-ld
build-ld: $(_UNITS_bin)
@:
.PHONY: builddirs-src
builddirs-src: $(_SRCDIRS)
@:
########################################################################
# lint
linters := clang-tidy iwyu groff mandoc
lint := $(foreach x,$(linters),lint-$(x))
$(_LINT_clang-tidy): %.lint.clang-tidy.touch: %.c
$(info LINT (clang-tidy) $@)
$(CLANG-TIDY) $(CLANG-TIDYFLAGS) $< -- $(CPPFLAGS) $(CFLAGS) 2>&1 \
| sed '/generated\.$$/d' || exit $$?
touch $@
$(_LINT_iwyu): %.lint.iwyu.touch: %.c
$(info LINT (iwyu) $@)
$(IWYU) $(IWYUFLAGS) $(CPPFLAGS) $(CFLAGS) $<
touch $@
$(_LINT_groff): $(_LINTDIR)/%.lint.groff.touch: $(MANDIR)/% | $$(@D)/.
$(info LINT (groff) $@)
$(GROFF) $(GROFFFLAGS) -z $<
touch $@
$(_LINT_mandoc): $(_LINTDIR)/%.lint.mandoc.touch: $(MANDIR)/% | $$(@D)/.
$(info LINT (mandoc) $@)
$(MANDOC) $(MANDOCFLAGS) $<
touch $@
$(_LINTDIRS): %/.: | $$(dir %). $(_LINTDIR)/.
.PHONY: $(lint)
$(lint): lint-%: $$(_LINT_%) | lintdirs
@:
.PHONY: lintdirs
lintdirs: $(_LINTDIRS) $(_SRCDIRS)
@:
.PHONY: lint
lint: $(lint)
@:
########################################################################
# html
# Use with
# make MAN2HTMLFLAGS=whatever html
# The sed removes the lines "Content-type: text/html\n\n"
$(_HTMLPAGES): $(_HTMLDIR)/%.html: $(MANDIR)/% | $$(@D)/.
$(info MAN2HTML $@)
$(MAN2HTML) $(MAN2HTMLFLAGS) $< | sed -e 1,2d >$@ || exit $$?
$(_HTMLDIRS): %/.: | $$(dir %). $(_HTMLDIR)/.
$(_htmlpages): $(_htmldir)/%: $(_HTMLDIR)/% | $$(@D)/.
$(info INSTALL $@)
$(INSTALL_DATA) -T $< $@
$(_htmldirs): %/.: | $$(dir %). $(_htmldir)/.
.PHONY: build-html html
build-html html: $(_HTMLPAGES) | builddirs-html
@:
.PHONY: builddirs-html
builddirs-html: $(_HTMLDIRS)
@:
.PHONY: install-html
install-html: $(_htmlpages) | installdirs-html
@:
.PHONY: installdirs-html
installdirs-html: $(_htmldirs)
@:
.PHONY: uninstall-html
uninstall-html: $(_htmldir_rmdir) $(_htmldirs_rmdir) $(_htmlpages_rm)
@:
########################################################################
$(V).SILENT:
FORCE:
