100 lines
2.9 KiB
Go
100 lines
2.9 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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"strings"
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"github.com/GoogleCloudPlatform/kaniko/pkg/util"
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"github.com/containers/image/manifest"
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"github.com/docker/docker/builder/dockerfile/instructions"
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"github.com/sirupsen/logrus"
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)
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type EnvCommand struct {
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cmd *instructions.EnvCommand
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}
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func (e *EnvCommand) ExecuteCommand(config *manifest.Schema2Config) error {
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logrus.Info("cmd: ENV")
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newEnvs := e.cmd.Env
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for index, pair := range newEnvs {
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expandedKey, err := util.ResolveEnvironmentReplacement(pair.Key, config.Env, false)
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if err != nil {
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return err
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}
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expandedValue, err := util.ResolveEnvironmentReplacement(pair.Value, config.Env, false)
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if err != nil {
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return err
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}
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newEnvs[index] = instructions.KeyValuePair{
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Key: expandedKey,
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Value: expandedValue,
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}
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}
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return updateConfigEnv(newEnvs, config)
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}
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func updateConfigEnv(newEnvs []instructions.KeyValuePair, config *manifest.Schema2Config) error {
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// First, convert config.Env array to []instruction.KeyValuePair
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var kvps []instructions.KeyValuePair
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for _, env := range config.Env {
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entry := strings.Split(env, "=")
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kvps = append(kvps, instructions.KeyValuePair{
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Key: entry[0],
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Value: entry[1],
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})
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}
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// Iterate through new environment variables, and replace existing keys
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// We can't use a map because we need to preserve the order of the environment variables
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Loop:
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for _, newEnv := range newEnvs {
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for index, kvp := range kvps {
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// If key exists, replace the KeyValuePair...
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if kvp.Key == newEnv.Key {
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logrus.Debugf("Replacing environment variable %v with %v in config", kvp, newEnv)
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kvps[index] = newEnv
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continue Loop
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}
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}
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// ... Else, append it as a new env variable
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kvps = append(kvps, newEnv)
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}
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// Convert back to array and set in config
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envArray := []string{}
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for _, kvp := range kvps {
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entry := kvp.Key + "=" + kvp.Value
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envArray = append(envArray, entry)
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}
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config.Env = envArray
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return nil
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}
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// We know that no files have changed, so return an empty array
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func (e *EnvCommand) FilesToSnapshot() []string {
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return []string{}
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}
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// CreatedBy returns some information about the command for the image config history
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func (e *EnvCommand) CreatedBy() string {
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envArray := []string{e.cmd.Name()}
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for _, pair := range e.cmd.Env {
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envArray = append(envArray, pair.Key+"="+pair.Value)
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}
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return strings.Join(envArray, " ")
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}
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