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tailscale/tool/gocross/autoflags_test.go
James Tucker 538c2e8f7c tool/gocross: add debug data to CGO builds 
We don't build a lot of tools with CGO, but we do build some, and it's
extremely valuable for production services in particular to have symbols
included - for perf and so on.

I tested various other builds that could be affected negatively, in
particular macOS/iOS, but those use split-dwarf already as part of their
build path, and Android which does not currently use gocross.

One binary which is normally 120mb only grew to 123mb, so the trade-off
is definitely worthwhile in context.

Updates tailscale/corp#20296

Signed-off-by: James Tucker <james@tailscale.com>
2024-05-22 20:47:28 -07:00

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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package main
import (
"reflect"
"testing"
"tailscale.com/version/mkversion"
)
var fakeVersion = mkversion.VersionInfo{
Short: "1.2.3",
Long: "1.2.3-long",
GitHash: "abcd",
OtherHash: "defg",
Xcode: "100.2.3",
Winres: "1,2,3,0",
}
func TestAutoflags(t *testing.T) {
tests := []struct {
// name convention: "<hostos>_<hostarch>_to_<targetos>_<targetarch>_<anything else?>"
name string
env map[string]string
argv []string
goroot string
nativeGOOS string
nativeGOARCH string
wantEnv map[string]string
envDiff string
wantArgv []string
}{
{
name: "linux_amd64_to_linux_amd64",
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/tailcontrol",
},
},
{
name: "install_linux_amd64_to_linux_amd64",
argv: []string{"gocross", "install", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "install",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_linux_riscv64",
env: map[string]string{
"GOARCH": "riscv64",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=0 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=riscv64 (was riscv64)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_freebsd_amd64",
env: map[string]string{
"GOOS": "freebsd",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=0 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=freebsd (was freebsd)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_linux_amd64_race",
argv: []string{"gocross", "test", "-race", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "test",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"-race",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_windows_amd64",
env: map[string]string{
"GOOS": "windows",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=0 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=windows (was windows)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg -H windows -s",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_android_amd64",
env: map[string]string{
"GOOS": "android",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=0 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=android (was android)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_android_amd64_cgo",
env: map[string]string{
"GOOS": "android",
"CGO_ENABLED": "1",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was 1)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=android (was android)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_arm64",
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=arm64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_arm64_empty_goos",
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
env: map[string]string{
"GOOS": "",
},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=arm64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was )
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_arm64_empty_goarch",
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
env: map[string]string{
"GOARCH": "",
},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=arm64 (was )
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_amd64",
env: map[string]string{
"GOARCH": "amd64",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was amd64)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_ios_arm64",
env: map[string]string{
"GOOS": "ios",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=arm64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=ios (was ios)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=1 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_amd64_xcode",
env: map[string]string{
"GOOS": "darwin",
"GOARCH": "amd64",
"XCODE_VERSION_ACTUAL": "1300",
"MACOSX_DEPLOYMENT_TARGET": "11.3",
"SDKROOT": "/my/sdk/root",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g -mmacosx-version-min=11.3 -isysroot /my/sdk/root -arch x86_64 (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS=-mmacosx-version-min=11.3 -isysroot /my/sdk/root -arch x86_64 (was <nil>)
GOARCH=amd64 (was amd64)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was darwin)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt,ts_macext",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg -w",
"./cmd/tailcontrol",
},
},
{
name: "darwin_amd64_to_ios_arm64_xcode",
env: map[string]string{
"GOOS": "ios",
"GOARCH": "arm64",
"XCODE_VERSION_ACTUAL": "1300",
"IPHONEOS_DEPLOYMENT_TARGET": "15.0",
"SDKROOT": "/my/sdk/root",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g -miphoneos-version-min=15.0 -isysroot /my/sdk/root -arch arm64 (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS=-miphoneos-version-min=15.0 -isysroot /my/sdk/root -arch arm64 (was <nil>)
GOARCH=arm64 (was arm64)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=ios (was ios)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=1 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt,ts_macext",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg -w",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_linux_amd64_in_goroot",
argv: []string{"go", "build", "./cmd/tailcontrol"},
goroot: "/special/toolchain/path",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/special/toolchain/path (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"go", "build",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/tailcontrol",
},
},
{
name: "linux_list_amd64_to_linux_amd64",
argv: []string{"gocross", "list", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "list",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_linux_amd64_with_extra_glibc_path",
env: map[string]string{
"GOCROSS_GLIBC_DIR": "/my/glibc/path",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static -L /my/glibc/path'",
"./cmd/tailcontrol",
},
},
{
name: "linux_amd64_to_linux_amd64_go_run_tags",
argv: []string{"go", "run", "./cmd/mkctr", "--tags=foo"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"go", "run",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/mkctr",
"--tags=foo",
},
},
{
name: "linux_amd64_to_linux_amd64_custom_toolchain",
env: map[string]string{
"GOTOOLCHAIN": "go1.30rc5",
},
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
goroot: "/goroot",
nativeGOOS: "linux",
nativeGOARCH: "amd64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 -g (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=amd64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=linux (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was go1.30rc5)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,osusergo,netgo",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg '-extldflags=-static'",
"./cmd/tailcontrol",
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
getver := func() mkversion.VersionInfo { return fakeVersion }
env := newEnvironmentForTest(test.env, nil, nil)
gotArgv, env, err := autoflagsForTest(test.argv, env, test.goroot, test.nativeGOOS, test.nativeGOARCH, getver)
if err != nil {
t.Fatalf("newAutoflagsForTest failed: %v", err)
}
if diff := env.Diff(); diff != test.envDiff {
t.Errorf("wrong environment diff, got:\n%s\n\nwant:\n%s", diff, test.envDiff)
}
if !reflect.DeepEqual(gotArgv, test.wantArgv) {
t.Errorf("wrong argv:\n got : %s\n want: %s", formatArgv(gotArgv), formatArgv(test.wantArgv))
}
})
}
}
func TestExtractTags(t *testing.T) {
s := func(ss ...string) []string { return ss }
tests := []struct {
name string
cmd string
in []string
filt []string // want filtered
tags []string // want tags
}{
{
name: "one_hyphen_tags",
cmd: "build",
in: s("foo", "-tags=a,b", "bar"),
filt: s("foo", "bar"),
tags: s("a", "b"),
},
{
name: "two_hyphen_tags",
cmd: "build",
in: s("foo", "--tags=a,b", "bar"),
filt: s("foo", "bar"),
tags: s("a", "b"),
},
{
name: "one_hypen_separate_arg",
cmd: "build",
in: s("foo", "-tags", "a,b", "bar"),
filt: s("foo", "bar"),
tags: s("a", "b"),
},
{
name: "two_hypen_separate_arg",
cmd: "build",
in: s("foo", "--tags", "a,b", "bar"),
filt: s("foo", "bar"),
tags: s("a", "b"),
},
{
name: "equal_empty",
cmd: "build",
in: s("foo", "--tags=", "bar"),
filt: s("foo", "bar"),
tags: s(),
},
{
name: "arg_empty",
cmd: "build",
in: s("foo", "--tags", "", "bar"),
filt: s("foo", "bar"),
tags: s(),
},
{
name: "arg_empty_truncated",
cmd: "build",
in: s("foo", "--tags"),
filt: s("foo"),
tags: s(),
},
{
name: "go_run_with_program_tags",
cmd: "run",
in: s("--foo", "--tags", "bar", "my/package/name", "--tags", "qux"),
filt: s("--foo", "my/package/name", "--tags", "qux"),
tags: s("bar"),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
filt, tags := extractTags(tt.cmd, tt.in)
if !reflect.DeepEqual(filt, tt.filt) {
t.Errorf("extractTags(%q, %q) filtered = %q; want %q", tt.cmd, tt.in, filt, tt.filt)
}
if !reflect.DeepEqual(tags, tt.tags) {
t.Errorf("extractTags(%q, %q) tags = %q; want %q", tt.cmd, tt.in, tags, tt.tags)
}
})
}
}
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