doc lint: make "lint-docs" non-.PHONY

Speed up the "lint-docs" target by making it non-.PHONY. Similar to my
c234e8a0ec (Makefile: make the "sparse" target non-.PHONY,
2021-09-23). We'll now create empty files corresponding to a
dependency graph for each of these lint scripts.

This speeds things up a bit[1], and makes the output correspond to any
in-tree changes we have:

    $ touch git-add.txt; make lint-docs; make lint-docs
        GEN cmd-list.made
        GEN doc.dep
        LINT GITLINK git-add.txt
        LINT MAN END git-add.txt
        LINT MAN SEC git-add.txt
    make: Nothing to be done for 'lint-docs'.

As with the "sparse" target changes this has a hard dependency on the
use of ".DELETE_ON_ERROR" in the Makefile, added here in
db10fc6c09 (doc: simplify Makefile using .DELETE_ON_ERROR,
2021-05-21). This method also depends on the output for us emitting
any errors on STDERR (fixed in a preceding commit), as well us these
scripts exiting with non-zero on any errors (which they were already
doing).

1.
$ git show HEAD~:Documentation/Makefile >Makefile.old
$ hyperfine --warmup 2 -L f ",.old" 'make -j1 -f Makefile{f} lint-docs'
Benchmark #1: make -j1 -f Makefile lint-docs
  Time (mean ± σ):      60.8 ms ±   1.4 ms    [User: 58.7 ms, System: 2.5 ms]
  Range (min … max):    58.9 ms …  64.0 ms    48 runs

Benchmark #2: make -j1 -f Makefile.old lint-docs
  Time (mean ± σ):      84.0 ms ±   1.5 ms    [User: 78.6 ms, System: 5.7 ms]
  Range (min … max):    81.8 ms …  87.8 ms    35 runs

Summary
  'make -j1 -f Makefile lint-docs' ran
    1.38 ± 0.04 times faster than 'make -j1 -f Makefile.old lint-docs'

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
pull/1120/merge
Ævar Arnfjörð Bjarmason 12 months ago committed by Junio C Hamano
parent 8cc804d0ab
commit 8650c6298c
  1. 1
      Documentation/.gitignore
  2. 65
      Documentation/Makefile
  3. 6
      Documentation/lint-gitlink.perl

@ -14,4 +14,5 @@ manpage-base-url.xsl
SubmittingPatches.txt
tmp-doc-diff/
GIT-ASCIIDOCFLAGS
/.build/
/GIT-EXCLUDED-PROGRAMS

@ -223,6 +223,7 @@ endif
ifneq ($(findstring $(MAKEFLAGS),s),s)
ifndef V
QUIET = @
QUIET_ASCIIDOC = @echo ' ' ASCIIDOC $@;
QUIET_XMLTO = @echo ' ' XMLTO $@;
QUIET_DB2TEXI = @echo ' ' DB2TEXI $@;
@ -230,11 +231,15 @@ ifndef V
QUIET_DBLATEX = @echo ' ' DBLATEX $@;
QUIET_XSLTPROC = @echo ' ' XSLTPROC $@;
QUIET_GEN = @echo ' ' GEN $@;
QUIET_LINT = @echo ' ' LINT $@;
QUIET_STDERR = 2> /dev/null
QUIET_SUBDIR0 = +@subdir=
QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \
$(MAKE) $(PRINT_DIR) -C $$subdir
QUIET_LINT_GITLINK = @echo ' ' LINT GITLINK $<;
QUIET_LINT_MANSEC = @echo ' ' LINT MAN SEC $<;
QUIET_LINT_MANEND = @echo ' ' LINT MAN END $<;
export V
endif
endif
@ -344,6 +349,7 @@ GIT-ASCIIDOCFLAGS: FORCE
fi
clean:
$(RM) -rf .build/
$(RM) *.xml *.xml+ *.html *.html+ *.1 *.5 *.7
$(RM) *.texi *.texi+ *.texi++ git.info gitman.info
$(RM) *.pdf
@ -478,14 +484,61 @@ quick-install-html: require-htmlrepo
print-man1:
@for i in $(MAN1_TXT); do echo $$i; done
lint-docs::
$(QUIET_LINT)$(PERL_PATH) lint-gitlink.perl \
## Lint: Common
.build:
$(QUIET)mkdir $@
.build/lint-docs: | .build
$(QUIET)mkdir $@
## Lint: gitlink
.build/lint-docs/gitlink: | .build/lint-docs
$(QUIET)mkdir $@
.build/lint-docs/gitlink/howto: | .build/lint-docs
$(QUIET)mkdir $@
.build/lint-docs/gitlink/config: | .build/lint-docs
$(QUIET)mkdir $@
LINT_DOCS_GITLINK = $(patsubst %.txt,.build/lint-docs/gitlink/%.ok,$(HOWTO_TXT) $(DOC_DEP_TXT))
$(LINT_DOCS_GITLINK): | .build/lint-docs/gitlink
$(LINT_DOCS_GITLINK): | .build/lint-docs/gitlink/howto
$(LINT_DOCS_GITLINK): | .build/lint-docs/gitlink/config
$(LINT_DOCS_GITLINK): lint-gitlink.perl
$(LINT_DOCS_GITLINK): .build/lint-docs/gitlink/%.ok: %.txt
$(QUIET_LINT_GITLINK)$(PERL_PATH) lint-gitlink.perl \
$< \
$(HOWTO_TXT) $(DOC_DEP_TXT) \
--section=1 $(MAN1_TXT) \
--section=5 $(MAN5_TXT) \
--section=7 $(MAN7_TXT) && \
$(PERL_PATH) lint-man-end-blurb.perl $(MAN_TXT) && \
$(PERL_PATH) lint-man-section-order.perl $(MAN_TXT)
--section=7 $(MAN7_TXT) >$@
.PHONY: lint-docs-gitlink
lint-docs-gitlink: $(LINT_DOCS_GITLINK)
## Lint: man-end-blurb
.build/lint-docs/man-end-blurb: | .build/lint-docs
$(QUIET)mkdir $@
LINT_DOCS_MAN_END_BLURB = $(patsubst %.txt,.build/lint-docs/man-end-blurb/%.ok,$(MAN_TXT))
$(LINT_DOCS_MAN_END_BLURB): | .build/lint-docs/man-end-blurb
$(LINT_DOCS_MAN_END_BLURB): lint-man-end-blurb.perl
$(LINT_DOCS_MAN_END_BLURB): .build/lint-docs/man-end-blurb/%.ok: %.txt
$(QUIET_LINT_MANEND)$(PERL_PATH) lint-man-end-blurb.perl $< >$@
.PHONY: lint-docs-man-end-blurb
lint-docs-man-end-blurb: $(LINT_DOCS_MAN_END_BLURB)
## Lint: man-section-order
.build/lint-docs/man-section-order: | .build/lint-docs
$(QUIET)mkdir $@
LINT_DOCS_MAN_SECTION_ORDER = $(patsubst %.txt,.build/lint-docs/man-section-order/%.ok,$(MAN_TXT))
$(LINT_DOCS_MAN_SECTION_ORDER): | .build/lint-docs/man-section-order
$(LINT_DOCS_MAN_SECTION_ORDER): lint-man-section-order.perl
$(LINT_DOCS_MAN_SECTION_ORDER): .build/lint-docs/man-section-order/%.ok: %.txt
$(QUIET_LINT_MANSEC)$(PERL_PATH) lint-man-section-order.perl $< >$@
.PHONY: lint-docs-man-section-order
lint-docs-man-section-order: $(LINT_DOCS_MAN_SECTION_ORDER)
## Lint: list of targets above
.PHONY: lint-docs
lint-docs: lint-docs-gitlink
lint-docs: lint-docs-man-end-blurb
lint-docs: lint-docs-man-section-order
ifeq ($(wildcard po/Makefile),po/Makefile)
doc-l10n install-l10n::

@ -5,11 +5,12 @@ use warnings;
# Parse arguments, a simple state machine for input like:
#
# howto/*.txt config/*.txt --section=1 git.txt git-add.txt [...] --to-lint git-add.txt a-file.txt [...]
# <file-to-check.txt> <valid-files-to-link-to> --section=1 git.txt git-add.txt [...] --to-lint git-add.txt a-file.txt [...]
my %TXT;
my %SECTION;
my $section;
my $lint_these = 0;
my $to_check = shift @ARGV;
for my $arg (@ARGV) {
if (my ($sec) = $arg =~ /^--section=(\d+)$/s) {
$section = $sec;
@ -36,7 +37,8 @@ sub report {
}
@ARGV = sort values %TXT;
die "BUG: Nothing to process!" unless @ARGV;
die "BUG: No list of valid linkgit:* files given" unless @ARGV;
@ARGV = $to_check;
while (<>) {
my $line = $_;
while ($line =~ m/linkgit:((.*?)\[(\d)\])/g) {

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