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handle ctxs with ':' in the name for windows (#235)

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For windows, if the ctx name for kubens state file
contains a colon ':' (EKS), we replace it with __ (both while reading/writing).

It doesn't break existing users (as it didn't work in the first place).

Other characters remain unhandled, hoping it won't happen again.

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>
This commit is contained in:
Ahmet Alp Balkan 2020-05-31 14:24:01 -07:00 committed by GitHub
parent 401188fefd
commit 0141ee19d2
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 47 additions and 1 deletions
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19
cmd/kubens/statefile.go
View File

@ -5,6 +5,8 @@ import (
"io/ioutil"
"os"
"path/filepath"
"runtime"
"strings"
"github.com/ahmetb/kubectx/internal/cmdutil"
)
@ -18,7 +20,14 @@ type NSFile struct {
func NewNSFile(ctx string) NSFile { return NSFile{dir: defaultDir, ctx: ctx} }
func (f NSFile) path() string { return filepath.Join(f.dir, f.ctx) }
func (f NSFile) path() string {
fn := f.ctx
if isWindows() {
// bug 230: eks clusters contain ':' in ctx name, not a valid file name for win32
fn = strings.ReplaceAll(fn, ":", "__")
}
return filepath.Join(f.dir, fn)
}
// Load reads the previous namespace setting, or returns empty if not exists.
func (f NSFile) Load() (string, error) {
@ -40,3 +49,11 @@ func (f NSFile) Save(value string) error {
}
return ioutil.WriteFile(f.path(), []byte(value), 0644)
}
// isWindows determines if the process is running on windows OS.
func isWindows() bool {
if os.Getenv("_FORCE_GOOS") == "windows" { // for testing
return true
}
return runtime.GOOS == "windows"
}

29
cmd/kubens/statefile_test.go
View File

@ -3,7 +3,11 @@ package main
import (
"io/ioutil"
"os"
"runtime"
"strings"
"testing"
"github.com/ahmetb/kubectx/internal/testutil"
)
func TestNSFile(t *testing.T) {
@ -36,3 +40,28 @@ func TestNSFile(t *testing.T) {
t.Fatalf("Load()=%q; expected=%q", v, expected)
}
}
func TestNSFile_path_windows(t *testing.T) {
defer testutil.WithEnvVar("_FORCE_GOOS", "windows")()
fp := NewNSFile("a:b:c").path()
if expected := "a__b__c"; !strings.HasSuffix(fp, expected) {
t.Fatalf("file did not have expected ending %q: %s", expected, fp)
}
}
func Test_isWindows(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("won't test this case on windows")
}
got := isWindows()
if got {
t.Fatalf("isWindows() returned true for %s", runtime.GOOS)
}
defer testutil.WithEnvVar("_FORCE_GOOS", "windows")()
if !isWindows() {
t.Fatalf("isWindows() failed to detect windows with env override.")
}
}