From: Alejandro Colomar <alx@kernel.org>
Date: Fri, 14 Apr 2023 15:12:30 +0000 (+0200)
Subject: src.mk: Optimize pipeline
X-Git-Tag: man-pages-6.05~181
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f76ae175aa2ad029f22dfa5c799eebc297a4e876;p=thirdparty%2Fman-pages.git

src.mk: Optimize pipeline

This pipeline is run for every make(1) invokation, and it was very slow,
due to running a new sed(1) process for every manual page.  Remove the
while loop, and rewrite so that all the commands in the pipeline are
only run once.  This brings times down ~10x in my system, from 1.5 s, to
just 0.14 s.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

diff --git a/share/mk/build/src.mk b/share/mk/build/src.mk
index 747cbd3985..365d6c8e6f 100644
--- a/share/mk/build/src.mk
+++ b/share/mk/build/src.mk
@@ -60,11 +60,9 @@ _SRCPAGEDIRS   := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.d,$(NONSO_MAN))
 _UNITS_src_src := $(patsubst $(MANDIR)/%,$(_MANDIR)/%,$(shell \
 		$(FIND) $(MANDIR)/man*/ -type f \
 		| $(GREP) '$(MANEXT)' \
-		| $(XARGS) $(GREP) -l '^\.TH ' \
-		| while read m; do \
-		    <$$m \
-		    $(SED) -n "s,^\... SRC BEGIN (\(.*.[ch]\))$$,$$m.d/\1,p"; \
-		done \
+		| $(XARGS) $(GREP) -H '^\.\\" SRC BEGIN ' \
+		| $(SED) 's,:\.\\" SRC BEGIN (,.d/,' \
+		| $(SED) 's/)//' \
 		| $(SORT)))
 _UNITS_src_h   := $(filter %.h,$(_UNITS_src_src))
 _UNITS_src_c   := $(filter %.c,$(_UNITS_src_src))