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build: Generate man pages after compiling Guile objects. 

This reduces compilation time since scripts are not compiled twice.
When building with 'make -j4' from a clean repository on an Intel
i5-2540M, compilation time gets from:

real	4m48.708s
user	17m29.892s
sys	0m9.596s

down to:

real	2m23.399s
user	6m48.604s
sys	0m6.420s

* doc.am (subcommand-manual-target): Delete function.
(SUBCOMMANDS): Delete variable.
(sub_command_mans, gen_man): New variables.
(dist_man1_MANS): Add $(sub_commands_mans).
(doc/guix-%.1): New target for sub-commands man pages.  It ensures that
man pages are built only after compiling Guile objects.
(doc/guix-daemon.1): Use $(gen_man).  Build only if BUILD_DAEMON.
(doc/guix.1): Use $(gen_man).  Add $(sub_command_mans) prerequisite.

Co-authored-by: Mathieu Lirzin <mthl@gnu.org>
This commit is contained in:
Eric Bavier 2016-01-27 20:31:04 -06:00 committed by Mathieu Lirzin
parent 171a0a13a4
commit 3662909752
1 changed files with 50 additions and 45 deletions
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95
doc.am
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@ -1,7 +1,9 @@
# GNU Guix --- Functional package management for GNU
# Copyright © 2016 Eric Bavier <bavier@member.fsf.org>
# Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2013 Andreas Enge <andreas@enge.fr>
# Copyright © 2016 Taylan Ulrich Bayırlı/Kammer <taylanbayirli@gmail.com>
# Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
#
# This file is part of GNU Guix.
#
@ -91,55 +93,58 @@ ps-local: $(DOT_FILES=%.dot=$(top_srcdir)/%.eps) \
$(top_srcdir)/doc/images/coreutils-size-map.eps
dvi-local: ps-local
# Manual pages.
## ----------- ##
## Man pages. ##
## ----------- ##
doc/guix.1: $(SUBCOMMANDS:%=guix/scripts/%.scm)
-$(AM_V_HELP2MAN)LANGUAGE= $(top_builddir)/pre-inst-env \
$(HELP2MAN) --output="$@" guix
sub_commands_mans = \
doc/guix-archive.1 \
doc/guix-build.1 \
doc/guix-challenge.1 \
doc/guix-download.1 \
doc/guix-edit.1 \
doc/guix-environment.1 \
doc/guix-gc.1 \
doc/guix-hash.1 \
doc/guix-import.1 \
doc/guix-lint.1 \
doc/guix-package.1 \
doc/guix-publish.1 \
doc/guix-pull.1 \
doc/guix-refresh.1 \
doc/guix-size.1 \
doc/guix-system.1
dist_man1_MANS = \
doc/guix.1 \
$(sub_commands_mans)
# Man pages are generated using GNU help2man.
gen_man = LANGUAGE= $(top_builddir)/pre-inst-env $(HELP2MAN)
# Note: Do not depend on 'scripts/guix' since that would trigger a rebuild
# even for people building from a tarball.
doc/guix.1: $(sub_commands_mans)
-$(AM_V_HELP2MAN)$(gen_man) --output="$@" `basename "$@" .1`
# Note: The dependency on $(GOBJECTS) is meant to force these docs to be made
# only after all Guile modules have been compiled. The 'case' ensures the man
# pages are only generated if the corresponding script source has been
# changed.
doc/guix-%.1: guix/scripts/%.scm $(GOBJECTS)
-@case '$?' in \
*$<*) $(AM_V_P) && set -x || echo " HELP2MAN $@"; \
$(gen_man) --output="$@" "guix $*";; \
*) : ;; \
esac
if BUILD_DAEMON
dist_man1_MANS += doc/guix-daemon.1
# Note: Do not depend on 'guix-daemon' since that would trigger a rebuild even
# for people building from a tarball.
doc/guix-daemon.1: nix/nix-daemon/guix-daemon.cc
-$(AM_V_HELP2MAN)LANGUAGE= $(top_builddir)/pre-inst-env \
$(HELP2MAN) --output="$@" guix-daemon
define subcommand-manual-target
doc/guix-$(1).1: guix/scripts/$(1).scm
-$$(AM_V_HELP2MAN)LANGUAGE= $(top_builddir)/pre-inst-env \
$(HELP2MAN) --output="$$@" "guix $(1)"
endef
SUBCOMMANDS := \
archive \
build \
challenge \
download \
edit \
environment \
gc \
hash \
import \
lint \
package \
publish \
pull \
refresh \
size \
system
$(eval $(foreach subcommand,$(SUBCOMMANDS), \
$(call subcommand-manual-target,$(subcommand))))
dist_man1_MANS = \
doc/guix.1 \
$(SUBCOMMANDS:%=doc/guix-%.1)
if BUILD_DAEMON
dist_man1_MANS += \
doc/guix-daemon.1
-$(AM_V_HELP2MAN)$(gen_man) --output="$@" `basename "$@" .1`
endif