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build: add alternate output format for bootstrap.bash, as used by builders

I've been doing these tweaks by hand. I was going to write a tool in
Go for it, but it's not much additional shell here.

Fixes #22912
Updates #9797 (already closed)

Change-Id: Ia15bd9b6876e6f6a76aa9ca86b10f113095e96a3
Reviewed-on: https://go-review.googlesource.com/80895
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Brad Fitzpatrick 2017-11-30 02:26:51 +00:00
parent 2708da0dc1
commit f0f62fcc46

View File

@ -14,6 +14,15 @@
#
# Only changes that have been committed to Git (at least locally,
# not necessary reviewed and submitted to master) are included in the tree.
#
# As a special case for Go's internal use only, if the
# BOOTSTRAP_FORMAT environment variable is set to "mintgz", the
# resulting archive is intended for use by the Go build system and
# differs in that the mintgz file:
# * is a tar.gz file instead of bz2
# * has many unnecessary files deleted to reduce its size
# * does not have a shared directory component for each tar entry
# Do not depend on the mintgz format.
set -e
@ -28,6 +37,11 @@ if [ -e $targ ]; then
exit 2
fi
if [ "$BOOTSTRAP_FORMAT" != "mintgz" -a "$BOOTSTRAP_FORMAT" != "" ]; then
echo "unknown BOOTSTRAP_FORMAT format"
exit 2
fi
unset GOROOT
src=$(cd .. && pwd)
echo "#### Copying to $targ"
@ -62,8 +76,36 @@ else
rmdir bin/*_*
rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}"
fi
GITREV=$(git rev-parse --short HEAD)
rm -rf pkg/bootstrap pkg/obj .git
# Support for building minimal tar.gz for the builders.
# The build system doesn't support bzip2, and by deleting more stuff,
# they start faster, especially on machines without fast filesystems
# and things like tmpfs configures.
# Do not depend on this format. It's for internal use only.
if [ "$BOOTSTRAP_FORMAT" = "mintgz" ]; then
OUTGZ="gobootstrap-${GOOS}-${GOARCH}-${GITREV}.tar.gz"
echo "Preparing to generate build system's ${OUTGZ}; cleaning ..."
rm -rf bin/gofmt
rm -rf src/runtime/race/race_*.syso
rm -rf api test doc misc/cgo/test misc/trace
rm -rf pkg/tool/*_*/{addr2line,api,cgo,cover,doc,fix,nm,objdump,pack,pprof,test2json,trace,vet}
rm -rf pkg/*_*/{image,database,cmd}
rm -rf $(find . -type d -name testdata)
find . -type f -name '*_test.go' -exec rm {} \;
# git clean doesn't clean symlinks apparently, and the buildlet
# rejects them, so:
find . -type l -exec rm {} \;
echo "Writing ${OUTGZ} ..."
tar cf - . | gzip -9 > ../$OUTGZ
cd ..
ls -l "$(pwd)/$OUTGZ"
exit 0
fi
echo ----
echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)".
echo Building tbz.