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Save Helm charts to disk before upgrading
Signed-off-by: Daniel Weiße <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| Copyright (c) Edgeless Systems GmbH | ||
| SPDX-License-Identifier: AGPL-3.0-only | ||
| */ | ||
|
|
||
| package helm | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "path/filepath" | ||
|
|
||
| "github.com/edgelesssys/constellation/v2/internal/file" | ||
| "helm.sh/helm/v3/pkg/chart" | ||
| "helm.sh/helm/v3/pkg/chartutil" | ||
| ) | ||
|
|
||
| // saveChartToDisk saves a chart as files in a directory. | ||
| // | ||
| // This takes the chart name, and creates a new subdirectory inside of the given dest | ||
| // directory, writing the chart's contents to that subdirectory. | ||
| // Dependencies are written using the same format, instead of writing them as tar files | ||
| // | ||
| // View the SaveDir implementation in chartutil as reference: https://github.com/helm/helm/blob/3a31588ad33fe3b89af5a2a54ee1d25bfe6eaa5e/pkg/chartutil/save.go#L40 | ||
| func saveChartToDisk(c *chart.Chart, dest string, fileHandler file.Handler) error { | ||
| // Create the chart directory | ||
| outdir := filepath.Join(dest, c.Name()) | ||
| if fi, err := fileHandler.Stat(outdir); err == nil && !fi.IsDir() { | ||
| return fmt.Errorf("file %s already exists and is not a directory", outdir) | ||
| } | ||
| if err := fileHandler.MkdirAll(outdir); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Save the chart file. | ||
| if err := chartutil.SaveChartfile(filepath.Join(outdir, chartutil.ChartfileName), c.Metadata); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Save values.yaml | ||
| for _, f := range c.Raw { | ||
| if f.Name == chartutil.ValuesfileName { | ||
| vf := filepath.Join(outdir, chartutil.ValuesfileName) | ||
| if err := writeFile(vf, f.Data, fileHandler); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Save values.schema.json if it exists | ||
| if c.Schema != nil { | ||
| filename := filepath.Join(outdir, chartutil.SchemafileName) | ||
| if err := writeFile(filename, c.Schema, fileHandler); err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| // Save templates and files | ||
| for _, o := range [][]*chart.File{c.Templates, c.Files} { | ||
| for _, f := range o { | ||
| n := filepath.Join(outdir, f.Name) | ||
| if err := writeFile(n, f.Data, fileHandler); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Save dependencies | ||
| base := filepath.Join(outdir, chartutil.ChartsDir) | ||
| for _, dep := range c.Dependencies() { | ||
| // Don't write dependencies as tar files | ||
| // Instead recursively use saveChartToDisk | ||
| if err := saveChartToDisk(dep, base, fileHandler); err != nil { | ||
| return fmt.Errorf("saving %s: %w", dep.ChartFullPath(), err) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func writeFile(name string, content []byte, fileHandler file.Handler) error { | ||
| if err := fileHandler.MkdirAll(filepath.Dir(name)); err != nil { | ||
| return err | ||
| } | ||
| return fileHandler.Write(name, content) | ||
| } |
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