mirror of
https://github.com/harness/drone.git
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b1b4111271
* feat: [CDE-230]: Cleaning logs from command exec inside gitspace container. * fix: [CDE-229]: Updating code-repo mgmt inside gitspace container.
134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
// Copyright 2023 Harness, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package devcontainer
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"github.com/docker/docker/api/types/container"
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"github.com/docker/docker/client"
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"github.com/docker/docker/pkg/stdcopy"
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)
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const RootUser = "root"
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type Exec struct {
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ContainerName string
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DockerClient *client.Client
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HomeDir string
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UserIdentifier string
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}
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type execResult struct {
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StdOut []byte
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StdErr []byte
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}
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func (e *Exec) ExecuteCommand(
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ctx context.Context,
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command string,
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root bool,
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detach bool,
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workingDir string,
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) ([]byte, error) {
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user := e.UserIdentifier
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if root {
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user = RootUser
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}
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cmd := []string{"/bin/sh", "-c", command}
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execConfig := container.ExecOptions{
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User: user,
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AttachStdout: true,
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AttachStderr: true,
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Cmd: cmd,
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Detach: detach,
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WorkingDir: workingDir,
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}
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execID, err := e.DockerClient.ContainerExecCreate(ctx, e.ContainerName, execConfig)
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if err != nil {
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return nil, fmt.Errorf("failed to create docker exec for container %s: %w", e.ContainerName, err)
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}
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attachResult, err := e.attachExec(ctx, execID.ID, detach)
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if err != nil && err.Error() != "unable to upgrade to tcp, received 200" {
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return nil, fmt.Errorf("failed to start docker exec for container %s: %w", e.ContainerName, err)
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}
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var stdOutput []byte
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if attachResult != nil {
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stdOutput = attachResult.StdOut
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}
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return stdOutput, nil
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}
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func (e *Exec) ExecuteCommandInHomeDirectory(
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ctx context.Context,
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command string,
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root bool,
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detach bool,
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) ([]byte, error) {
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return e.ExecuteCommand(ctx, command, root, detach, e.HomeDir)
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}
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func (e *Exec) attachExec(ctx context.Context, id string, detach bool) (*execResult, error) {
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resp, attachErr := e.DockerClient.ContainerExecAttach(ctx, id, container.ExecStartOptions{Detach: detach})
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if attachErr != nil {
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return nil, attachErr
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}
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defer resp.Close()
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var outBuf, errBuf bytes.Buffer
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copyErr := make(chan error)
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go func() {
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// StdCopy demultiplexes the stream into two buffers
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_, err := stdcopy.StdCopy(&outBuf, &errBuf, resp.Reader)
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copyErr <- err
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}()
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select {
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case err := <-copyErr:
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if err != nil {
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return nil, err
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}
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break
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case <-ctx.Done():
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return nil, ctx.Err()
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}
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stdout, err := io.ReadAll(&outBuf)
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if err != nil {
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return nil, fmt.Errorf("failed to read stdout of exec for container %s: %w", e.ContainerName, err)
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}
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stderr, err := io.ReadAll(&errBuf)
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if err != nil {
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return nil, fmt.Errorf("failed to read stderr of exec for container %s: %w", e.ContainerName, err)
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}
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return &execResult{
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StdOut: stdout,
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StdErr: stderr,
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}, nil
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}
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