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https://github.com/ahmetb/kubectx.git
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eb621b4406
Previously, kubectx would error with "multiple files in KUBECONFIG are currently not supported" when KUBECONFIG contained colon-separated paths. This is a common setup where users maintain separate kubeconfig files for different clusters/environments. This change evolves the internal Kubeconfig struct from holding a single file to a slice of file entries, matching kubectl's merge semantics: - Reading current-context: first file with a non-empty value wins - Writing current-context: always written to the first file - Listing contexts: merged from all files, first occurrence wins for duplicate names - Modifying a context (delete/rename/set-namespace): written to the file that owns that context - Missing files in the KUBECONFIG list are silently skipped (matching kubectl behavior), but permission errors are propagated The Loader interface already returned []ReadWriteResetCloser, so all public method signatures remain unchanged — zero modifications needed in cmd/kubectx/ or cmd/kubens/ callers. Fixes #485 Fixes #211 Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kubeconfig
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import (
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"errors"
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"fmt"
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"slices"
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"sigs.k8s.io/kustomize/kyaml/yaml"
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)
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func contextsNodeOf(fe *fileEntry) (*yaml.RNode, error) {
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contexts, err := fe.config.Pipe(yaml.Get("contexts"))
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if err != nil {
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return nil, err
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}
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if contexts == nil {
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return nil, errors.New("\"contexts\" entry is nil")
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} else if contexts.YNode().Kind != yaml.SequenceNode {
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return nil, errors.New("\"contexts\" is not a sequence node")
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}
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return contexts, nil
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}
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// contextNodeWithFileIndex searches for a context by name across all files.
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// Returns the context node and the index of the file that contains it.
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// Files without a valid "contexts" sequence are skipped, but if errors occur
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// during lookup they are included in the final error message.
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func (k *Kubeconfig) contextNodeWithFileIndex(name string) (*yaml.RNode, int, error) {
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var fileErrors []error
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for i := range k.files {
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contexts, err := contextsNodeOf(&k.files[i])
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if err != nil {
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fileErrors = append(fileErrors, fmt.Errorf("file %d: %w", i, err))
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continue
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}
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context, err := contexts.Pipe(yaml.Lookup("[name=" + name + "]"))
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if err != nil {
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fileErrors = append(fileErrors, fmt.Errorf("file %d lookup: %w", i, err))
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continue
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}
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if context != nil {
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return context, i, nil
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}
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}
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if len(fileErrors) > 0 {
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return nil, -1, fmt.Errorf("context with name %q not found (errors in files: %w)",
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name, errors.Join(fileErrors...))
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}
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return nil, -1, fmt.Errorf("context with name %q not found", name)
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}
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func (k *Kubeconfig) contextNode(name string) (*yaml.RNode, error) {
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node, _, err := k.contextNodeWithFileIndex(name)
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return node, err
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}
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func (k *Kubeconfig) ContextNames() ([]string, error) {
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seen := make(map[string]bool)
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var names []string
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for i := range k.files {
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contexts, err := k.files[i].config.Pipe(yaml.Get("contexts"))
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if err != nil {
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return nil, fmt.Errorf("failed to get contexts: %w", err)
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}
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if contexts == nil {
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continue
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}
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fileNames, err := contexts.ElementValues("name")
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if err != nil {
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return nil, fmt.Errorf("failed to get context names: %w", err)
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}
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for _, n := range fileNames {
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if !seen[n] {
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seen[n] = true
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names = append(names, n)
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}
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}
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}
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return names, nil
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}
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func (k *Kubeconfig) ContextExists(name string) (bool, error) {
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names, err := k.ContextNames()
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if err != nil {
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return false, err
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}
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return slices.Contains(names, name), nil
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}
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