mirror of https://github.com/docker/docs.git
48 lines
1.6 KiB
Go
48 lines
1.6 KiB
Go
package builder
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import (
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"os"
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"github.com/docker/docker/builder/dockerignore"
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"github.com/docker/docker/pkg/fileutils"
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)
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// DockerIgnoreContext wraps a ModifiableContext to add a method
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// for handling the .dockerignore file at the root of the context.
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type DockerIgnoreContext struct {
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ModifiableContext
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}
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// Process reads the .dockerignore file at the root of the embedded context.
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// If .dockerignore does not exist in the context, then nil is returned.
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//
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// It can take a list of files to be removed after .dockerignore is removed.
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// This is used for server-side implementations of builders that need to send
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// the .dockerignore file as well as the special files specified in filesToRemove,
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// but expect them to be excluded from the context after they were processed.
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//
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// For example, server-side Dockerfile builders are expected to pass in the name
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// of the Dockerfile to be removed after it was parsed.
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//
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// TODO: Don't require a ModifiableContext (use Context instead) and don't remove
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// files, instead handle a list of files to be excluded from the context.
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func (c DockerIgnoreContext) Process(filesToRemove []string) error {
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f, err := c.Open(".dockerignore")
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// Note that a missing .dockerignore file isn't treated as an error
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return err
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}
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excludes, _ := dockerignore.ReadAll(f)
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filesToRemove = append([]string{".dockerignore"}, filesToRemove...)
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for _, fileToRemove := range filesToRemove {
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rm, _ := fileutils.Matches(fileToRemove, excludes)
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if rm {
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c.Remove(fileToRemove)
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}
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}
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return nil
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}
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