66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package buildpacks
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"regexp"
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"strings"
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"github.com/dokku/dokku/plugins/common"
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)
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func rewriteBuildpacksFile(sourceWorkDir string) error {
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buildpacksPath := filepath.Join(sourceWorkDir, ".buildpacks")
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if !common.FileExists(buildpacksPath) {
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return nil
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}
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buildpacks, err := common.FileToSlice(buildpacksPath)
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if err != nil {
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return err
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}
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for i, buildpack := range buildpacks {
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if buildpack == "" {
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continue
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}
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buildpack, err = validBuildpackURL(buildpack)
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if err != nil {
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return fmt.Errorf("Unable to parse .buildpacks file, line %d: %s", i, err)
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}
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buildpacks[i] = buildpack
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}
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return common.WriteSliceToFile(common.WriteSliceToFileInput{
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Filename: buildpacksPath,
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Lines: buildpacks,
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Mode: os.FileMode(0600),
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})
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}
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func validBuildpackURL(buildpack string) (string, error) {
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if buildpack == "" {
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return buildpack, errors.New("Must specify a buildpack url or reference")
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}
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reHerokuValue := regexp.MustCompile(`(?m)^([\w-]+\/[\w-]+)$`)
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if found := reHerokuValue.Find([]byte(buildpack)); found != nil {
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parts := strings.SplitN(buildpack, "/", 2)
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if parts[0] == "heroku-community" {
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parts[0] = "heroku"
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}
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return fmt.Sprintf("https://github.com/%s/heroku-buildpack-%s.git", parts[0], parts[1]), nil
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}
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reString := regexp.MustCompile(`(?m)^(http|https|git)(:\/\/|@)([^\/:]+)[\/:]([^\/:]+)\/(.+)(.git(#derp)?)?$`)
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if found := reString.Find([]byte(buildpack)); found != nil {
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return buildpack, nil
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}
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return buildpack, fmt.Errorf("Invalid buildpack specified: %v", buildpack)
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}
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