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110 lines
2.9 KiB
110 lines
2.9 KiB
/*
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Copyright The Helm Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package getter
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import (
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"bytes"
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"strings"
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"fmt"
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"os"
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"path/filepath"
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"helm.sh/helm/v3/internal/fileutil"
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"helm.sh/helm/v3/pkg/gitutil"
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)
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// Assigned here so it can be overridden for testing.
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var gitCloneTo = gitutil.CloneTo
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// GitGetter is the default HTTP(/S) backend handler
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type GitGetter struct {
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opts options
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}
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func (g *GitGetter) ChartName() string {
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return g.opts.chartName
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}
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// ensureGitDirIgnored will append ".git/" to the .helmignore file in a directory.
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// Create the .helmignore file if it does not exist.
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func (g *GitGetter) ensureGitDirIgnored(repoPath string) error {
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helmignorePath := filepath.Join(repoPath, ".helmignore")
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f, err := os.OpenFile(helmignorePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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return err
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}
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defer f.Close()
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if _, err := f.WriteString("\n.git/\n"); err != nil {
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return err
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}
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return nil
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}
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//Get performs a Get from repo.Getter and returns the body.
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func (g *GitGetter) Get(href string, options ...Option) (*bytes.Buffer, error) {
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for _, opt := range options {
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opt(&g.opts)
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}
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return g.get(href)
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}
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func (g *GitGetter) get(href string) (*bytes.Buffer, error) {
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gitURL := strings.TrimPrefix(href, "git://")
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version := g.opts.version
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chartName := g.opts.chartName
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if version == "" {
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return nil, fmt.Errorf("The version must be a valid tag or branch name for the git repo, not nil")
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}
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tmpDir, err := os.MkdirTemp("", "helm")
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if err != nil {
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return nil, err
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}
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chartTmpDir := filepath.Join(tmpDir, chartName)
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if err := os.MkdirAll(chartTmpDir, 0755); err != nil {
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return nil, err
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}
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defer os.RemoveAll(tmpDir)
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if err = gitCloneTo(gitURL, version, chartTmpDir); err != nil {
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return nil, fmt.Errorf("Unable to retrieve git repo. %s", err)
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}
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// A .helmignore that includes an ignore for .git/ should be included in the git repo itself,
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// but a lot of people will probably not think about that.
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// To prevent the git history from bleeding into the charts archive, append/create .helmignore.
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g.ensureGitDirIgnored(chartTmpDir)
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buf, err := fileutil.CompressDirToTgz(chartTmpDir, tmpDir)
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if err != nil {
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return nil, fmt.Errorf("Unable to tar and compress dir %s to tgz file. %s", tmpDir, err)
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}
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return buf, nil
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}
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// NewGitGetter constructs a valid git client as a Getter
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func NewGitGetter(ops ...Option) (Getter, error) {
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client := GitGetter{}
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for _, opt := range ops {
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opt(&client.opts)
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}
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return &client, nil
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}
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