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build: for default bootstrap, use Go 1.17 if present, falling back to Go 1.4

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Preparation for #44505, but safe for Go 1.18.
Also fixes the default build on Macs, at least for
people who have a $HOME/go1.17 or have run

	go install golang.org/dl/go1.17@latest
	go1.17 download

Change-Id: I822f93e75498620fad87db2436376148c42f6bff
Reviewed-on: https://go-review.googlesource.com/c/go/+/369914
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Russ Cox 2021-12-06 13:36:42 -05:00
parent a08bbd964d
commit 4300f10514
4 changed files with 25 additions and 2 deletions
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13
src/cmd/dist/buildtool.go vendored
View File

@ -93,10 +93,21 @@ var ignoreSuffixes = []string{
"_test.go",
}
var tryDirs = []string{
"sdk/go1.17",
"go1.17",
}
func bootstrapBuildTools() {
goroot_bootstrap := os.Getenv("GOROOT_BOOTSTRAP")
if goroot_bootstrap == "" {
goroot_bootstrap = pathf("%s/go1.4", os.Getenv("HOME"))
home := os.Getenv("HOME")
goroot_bootstrap = pathf("%s/go1.4", home)
for _, d := range tryDirs {
if p := pathf("%s/%s", home, d); isdir(p) {
goroot_bootstrap = p
}
}
}
xprintf("Building Go toolchain1 using %s.\n", goroot_bootstrap)

9
src/make.bash
View File

@ -153,7 +153,14 @@ if [ "$1" = "-v" ]; then
fi
goroot_bootstrap_set=${GOROOT_BOOTSTRAP+"true"}
export GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
if [ -z "$GOROOT_BOOTSTRAP" ]; then
GOROOT_BOOTSTRAP="$HOME/go1.4"
for d in sdk/go1.17 go1.17; do
if [ -d "$HOME/$d" ]; then
GOROOT_BOOTSTRAP="$HOME/$d"
fi
done
fi
export GOROOT="$(cd .. && pwd)"
IFS=$'\n'; for go_exe in $(type -ap go); do
if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then

2
src/make.bat
View File

@ -83,6 +83,8 @@ for /f "tokens=*" %%g in ('where go 2^>nul') do (
)
)
)
if "x%GOROOT_BOOTSTRAP%"=="x" if exist "%HOMEDRIVE%%HOMEPATH%\go1.17" set GOROOT_BOOTSTRAP=%HOMEDRIVE%%HOMEPATH%\go1.17
if "x%GOROOT_BOOTSTRAP%"=="x" if exist "%HOMEDRIVE%%HOMEPATH%\sdk\go1.17" set GOROOT_BOOTSTRAP=%HOMEDRIVE%%HOMEPATH%\sdk\go1.17
if "x%GOROOT_BOOTSTRAP%"=="x" set GOROOT_BOOTSTRAP=%HOMEDRIVE%%HOMEPATH%\Go1.4
:bootstrapset

3
src/make.rc
View File

@ -55,6 +55,9 @@ goroot_bootstrap_set = 'true'
if(! ~ $#GOROOT_BOOTSTRAP 1){
goroot_bootstrap_set = 'false'
GOROOT_BOOTSTRAP = $home/go1.4
for(d in sdk/go1.17 go1.17)
if(test -d $home/$d)
GOROOT_BOOTSTRAP = $home/$d
}
for(p in $path){
if(! test -x $GOROOT_BOOTSTRAP/bin/go){