141 lines
4.0 KiB
Go
141 lines
4.0 KiB
Go
/*
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Copyright 2018 Google LLC
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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 commands
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import (
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"os"
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"path/filepath"
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"github.com/moby/buildkit/frontend/dockerfile/instructions"
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"github.com/sirupsen/logrus"
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"github.com/GoogleContainerTools/kaniko/pkg/constants"
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"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
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"github.com/GoogleContainerTools/kaniko/pkg/util"
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"github.com/google/go-containerregistry/pkg/v1"
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)
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type CopyCommand struct {
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BaseCommand
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cmd *instructions.CopyCommand
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buildcontext string
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snapshotFiles []string
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}
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func (c *CopyCommand) ExecuteCommand(config *v1.Config, buildArgs *dockerfile.BuildArgs) error {
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// Resolve from
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if c.cmd.From != "" {
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c.buildcontext = filepath.Join(constants.KanikoDir, c.cmd.From)
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}
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replacementEnvs := buildArgs.ReplacementEnvs(config.Env)
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srcs, dest, err := resolveEnvAndWildcards(c.cmd.SourcesAndDest, c.buildcontext, replacementEnvs)
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if err != nil {
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return err
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}
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// For each source, iterate through and copy it over
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for _, src := range srcs {
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fullPath := filepath.Join(c.buildcontext, src)
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fi, err := os.Lstat(fullPath)
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if err != nil {
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return err
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}
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cwd := config.WorkingDir
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if cwd == "" {
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cwd = constants.RootDir
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}
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destPath, err := util.DestinationFilepath(src, dest, cwd)
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if err != nil {
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return err
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}
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if fi.IsDir() {
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if !filepath.IsAbs(dest) {
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// we need to add '/' to the end to indicate the destination is a directory
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dest = filepath.Join(cwd, dest) + "/"
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}
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copiedFiles, err := util.CopyDir(fullPath, dest)
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if err != nil {
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return err
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}
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c.snapshotFiles = append(c.snapshotFiles, copiedFiles...)
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} else if fi.Mode()&os.ModeSymlink != 0 {
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// If file is a symlink, we want to create the same relative symlink
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if err := util.CopySymlink(fullPath, destPath); err != nil {
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return err
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}
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c.snapshotFiles = append(c.snapshotFiles, destPath)
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} else {
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// ... Else, we want to copy over a file
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if err := util.CopyFile(fullPath, destPath); err != nil {
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return err
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}
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c.snapshotFiles = append(c.snapshotFiles, destPath)
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}
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}
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return nil
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}
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func resolveEnvAndWildcards(sd instructions.SourcesAndDest, buildcontext string, envs []string) ([]string, string, error) {
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// First, resolve any environment replacement
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resolvedEnvs, err := util.ResolveEnvironmentReplacementList(sd, envs, true)
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if err != nil {
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return nil, "", err
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}
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dest := resolvedEnvs[len(resolvedEnvs)-1]
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// Resolve wildcards and get a list of resolved sources
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srcs, err := util.ResolveSources(resolvedEnvs, buildcontext)
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return srcs, dest, err
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}
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// FilesToSnapshot should return an empty array if still nil; no files were changed
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func (c *CopyCommand) FilesToSnapshot() []string {
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return c.snapshotFiles
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}
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// String returns some information about the command for the image config
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func (c *CopyCommand) String() string {
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return c.cmd.String()
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}
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func (c *CopyCommand) FilesUsedFromContext(config *v1.Config, buildArgs *dockerfile.BuildArgs) ([]string, error) {
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// We don't use the context if we're performing a copy --from.
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if c.cmd.From != "" {
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return nil, nil
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}
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replacementEnvs := buildArgs.ReplacementEnvs(config.Env)
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srcs, _, err := resolveEnvAndWildcards(c.cmd.SourcesAndDest, c.buildcontext, replacementEnvs)
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if err != nil {
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return nil, err
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}
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files := []string{}
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for _, src := range srcs {
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fullPath := filepath.Join(c.buildcontext, src)
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files = append(files, fullPath)
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}
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logrus.Infof("Using files from context: %v", files)
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return files, nil
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}
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func (c *CopyCommand) MetadataOnly() bool {
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return false
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}
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