This change addresses eight key improvements to the kubectx/kubens codebase:
Resource Management Fixes:
- Fix use-after-close bugs where Kubeconfig was accessed after Close()
- Fix resource leaks on error paths by ensuring defer kc.Close() is called
- Fix YAML encoder not being closed after Encode(), causing buffered data loss
API Design Improvements:
- Change ContextNames() to return ([]string, error) instead of silently returning
nil on error, making parse failures distinguishable from empty results
- Change GetCurrentContext() to return (string, error) instead of returning ""
for both "not set" and parse error cases
- Update all 16 call sites across cmd/kubectx and cmd/kubens packages to handle
the new error returns while preserving backward-compatible behavior
Error Handling:
- Add explicit error handling for printer.Success() calls in 5+ locations
by prefixing unchecked calls with _ =
Performance:
- Add slice pre-allocation in namespace list pagination using slices.Grow()
before append loops, reducing allocations when fetching 500+ item batches
All changes maintain backward compatibility for missing kubeconfig keys while
improving error transparency and resource safety.
Modernize the codebase to use idiomatic Go 1.25 patterns, removing deprecated APIs and reducing external dependencies.
- Replace deprecated `io/ioutil` with `os.ReadFile`, `os.WriteFile`, `os.MkdirTemp`, `os.CreateTemp`
- Replace `interface{}` with `any` (Go 1.18+)
- Remove `github.com/pkg/errors` dependency entirely, using stdlib `fmt.Errorf` with `%w` and `errors.New`
- Use `errors.As()` instead of direct type assertions on error values
- Use `strings.Cut()` for delimiter parsing instead of `strings.Split` + length check
- Use `slices.Contains()` for linear search in `ContextExists()`
- Use `t.Setenv()` and `t.TempDir()` in tests instead of manual env save/restore and temp dir cleanup
- Delete unused `internal/testutil/tempfile.go` helper
- Update GitHub Actions CI and release workflows from Go 1.22 to 1.25
Net result: -70 lines, 1 fewer external dependency.
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Spawns an isolated sub-shell with a minimal kubeconfig containing only the specified context.
This allows the user to launch a shell where they can only interact with a single cluster without having to worry about a command or an LLM agent interacting with other contexts.
Inside the isolated shell, most context switching/editing operations on kubectx are blocked. Nested shells not allowed.
Fixes#12.
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
* fix(release): customize goreleaser config file, by adding json schema and fixing configuration version
* fix(go): rename invalid comment format
* fix(ci): made release workflow work again
replace goreleaser --rm-dist flag by --clean
increment go version for release pipeline
fetch previous tags use by goreleaser
give release workflow content write permissions to publish release
* feat(kubens): added force flag to switch namespaces even if it doesn't exist
* Merged lines
* fixed README.md and flags.go
* updated flags.go, flags_test.go
More efficient ns switches with kubens by querying only the namespace (instead
of listing all namespaces).
Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>
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>
