mirror of
https://github.com/golang/go
synced 2024-11-18 10:24:42 -07:00
930d6ecb69
Preserve file modification times when copying bootstrap tree, this makes generated bootstrap more friendly to rsyncing. Change-Id: I32cde58c25b48d3c00d4413860dbd49a265b0ff2 Reviewed-on: https://go-review.googlesource.com/c/go/+/174217 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
122 lines
3.7 KiB
Bash
Executable File
122 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Copyright 2015 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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# When run as (for example)
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#
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# GOOS=linux GOARCH=ppc64 bootstrap.bash
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#
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# this script cross-compiles a toolchain for that GOOS/GOARCH
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# combination, leaving the resulting tree in ../../go-${GOOS}-${GOARCH}-bootstrap.
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# That tree can be copied to a machine of the given target type
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# and used as $GOROOT_BOOTSTRAP to bootstrap a local build.
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#
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# Only changes that have been committed to Git (at least locally,
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# not necessary reviewed and submitted to master) are included in the tree.
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#
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# As a special case for Go's internal use only, if the
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# BOOTSTRAP_FORMAT environment variable is set to "mintgz", the
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# resulting archive is intended for use by the Go build system and
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# differs in that the mintgz file:
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# * is a tar.gz file instead of bz2
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# * has many unnecessary files deleted to reduce its size
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# * does not have a shared directory component for each tar entry
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# Do not depend on the mintgz format.
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set -e
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if [ "$GOOS" = "" -o "$GOARCH" = "" ]; then
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echo "usage: GOOS=os GOARCH=arch ./bootstrap.bash" >&2
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exit 2
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fi
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targ="../../go-${GOOS}-${GOARCH}-bootstrap"
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if [ -e $targ ]; then
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echo "$targ already exists; remove before continuing"
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exit 2
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fi
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if [ "$BOOTSTRAP_FORMAT" != "mintgz" -a "$BOOTSTRAP_FORMAT" != "" ]; then
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echo "unknown BOOTSTRAP_FORMAT format"
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exit 2
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fi
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unset GOROOT
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src=$(cd .. && pwd)
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echo "#### Copying to $targ"
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cp -Rp "$src" "$targ"
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cd "$targ"
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echo
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echo "#### Cleaning $targ"
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chmod -R +w .
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rm -f .gitignore
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if [ -e .git ]; then
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git clean -f -d
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fi
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echo
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echo "#### Building $targ"
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echo
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cd src
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./make.bash --no-banner
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gohostos="$(../bin/go env GOHOSTOS)"
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gohostarch="$(../bin/go env GOHOSTARCH)"
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goos="$(../bin/go env GOOS)"
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goarch="$(../bin/go env GOARCH)"
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# NOTE: Cannot invoke go command after this point.
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# We're about to delete all but the cross-compiled binaries.
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cd ..
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if [ "$goos" = "$gohostos" -a "$goarch" = "$gohostarch" ]; then
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# cross-compile for local system. nothing to copy.
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# useful if you've bootstrapped yourself but want to
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# prepare a clean toolchain for others.
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true
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else
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rm -f bin/go_${goos}_${goarch}_exec
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mv bin/*_*/* bin
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rmdir bin/*_*
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rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}"
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fi
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if [ "$BOOTSTRAP_FORMAT" = "mintgz" ]; then
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# Fetch git revision before rm -rf .git.
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GITREV=$(git rev-parse --short HEAD)
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fi
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rm -rf pkg/bootstrap pkg/obj .git
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# Support for building minimal tar.gz for the builders.
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# The build system doesn't support bzip2, and by deleting more stuff,
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# they start faster, especially on machines without fast filesystems
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# and things like tmpfs configures.
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# Do not depend on this format. It's for internal use only.
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if [ "$BOOTSTRAP_FORMAT" = "mintgz" ]; then
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OUTGZ="gobootstrap-${GOOS}-${GOARCH}-${GITREV}.tar.gz"
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echo "Preparing to generate build system's ${OUTGZ}; cleaning ..."
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rm -rf bin/gofmt
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rm -rf src/runtime/race/race_*.syso
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rm -rf api test doc misc/cgo/test misc/trace
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rm -rf pkg/tool/*_*/{addr2line,api,cgo,cover,doc,fix,nm,objdump,pack,pprof,test2json,trace,vet}
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rm -rf pkg/*_*/{image,database,cmd}
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rm -rf $(find . -type d -name testdata)
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find . -type f -name '*_test.go' -exec rm {} \;
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# git clean doesn't clean symlinks apparently, and the buildlet
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# rejects them, so:
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find . -type l -exec rm {} \;
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echo "Writing ${OUTGZ} ..."
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tar cf - . | gzip -9 > ../$OUTGZ
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cd ..
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ls -l "$(pwd)/$OUTGZ"
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exit 0
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fi
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echo ----
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echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)".
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echo Building tbz.
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cd ..
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tar cf - "go-${GOOS}-${GOARCH}-bootstrap" | bzip2 -9 >"go-${GOOS}-${GOARCH}-bootstrap.tbz"
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ls -l "$(pwd)/go-${GOOS}-${GOARCH}-bootstrap.tbz"
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exit 0
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