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Enable to execute shell on a build step for debugging
Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "github.com/containerd/console" | ||
| "github.com/moby/buildkit/client" | ||
| bccommon "github.com/moby/buildkit/cmd/buildctl/common" | ||
| gwclient "github.com/moby/buildkit/frontend/gateway/client" | ||
| "github.com/urfave/cli" | ||
| ) | ||
|
|
||
| var debugShellCommand = cli.Command{ | ||
| Name: "shell", | ||
| Usage: "exec shell in a vertex", | ||
| Action: debugShellAction, | ||
| } | ||
|
|
||
| var debugCloseCommand = cli.Command{ | ||
| Name: "close", | ||
| Usage: "close a build job remaining for debugging", | ||
| Action: debugCloseAction, | ||
| } | ||
|
|
||
| func debugCloseAction(clicontext *cli.Context) error { | ||
| ref := clicontext.Args().Get(0) | ||
| if ref == "" { | ||
| return fmt.Errorf("ref must be specified") | ||
| } | ||
| c, err := bccommon.ResolveClient(clicontext) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| ctx := clicontext.App.Metadata["context"].(context.Context) | ||
| return c.DebugClose(ctx, ref) | ||
| } | ||
|
|
||
| func debugShellAction(clicontext *cli.Context) error { | ||
| ref := clicontext.Args().Get(0) | ||
| vtx := clicontext.Args().Get(1) | ||
| if ref == "" || vtx == "" { | ||
| return fmt.Errorf("ref and vertex must be specified") | ||
| } | ||
| c, err := bccommon.ResolveClient(clicontext) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| ctx := clicontext.App.Metadata["context"].(context.Context) | ||
| return execProcess(ctx, c, ref, vtx, gwclient.StartRequest{ | ||
| Args: []string{"/bin/sh"}, | ||
| Stdin: os.Stdin, | ||
| Stdout: os.Stderr, | ||
| Stderr: os.Stderr, | ||
| Tty: true, | ||
| }) | ||
| } | ||
|
|
||
| func execProcess(ctx context.Context, c *client.Client, ref, vtx string, req gwclient.StartRequest) error { | ||
| con := console.Current() | ||
| defer con.Reset() | ||
| if err := con.SetRaw(); err != nil { | ||
| return err | ||
| } | ||
| p, err := c.DebugExecProcess(ctx, ref, vtx, req) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to start process: %w", err) | ||
| } | ||
| resizeConsole(ctx, p, con) | ||
| return p.Wait() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| //go:build !linux | ||
| // +build !linux | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/containerd/console" | ||
| gwclient "github.com/moby/buildkit/frontend/gateway/client" | ||
| ) | ||
|
|
||
| func resizeConsole(ctx context.Context, p gwclient.ContainerProcess, con console.Console) {} |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| //go:build linux | ||
| // +build linux | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "os" | ||
| "os/signal" | ||
| "syscall" | ||
|
|
||
| "github.com/containerd/console" | ||
| gwclient "github.com/moby/buildkit/frontend/gateway/client" | ||
| ) | ||
|
|
||
| func resizeConsole(ctx context.Context, p gwclient.ContainerProcess, con console.Console) { | ||
| ch := make(chan os.Signal, 1) | ||
| signal.Notify(ch, syscall.SIGWINCH) | ||
| go func() { | ||
| for { | ||
| select { | ||
| case <-ch: | ||
| size, err := con.Size() | ||
| if err != nil { | ||
| continue | ||
| } | ||
| p.Resize(ctx, gwclient.WinSize{Cols: uint32(size.Width), Rows: uint32(size.Height)}) | ||
| } | ||
| } | ||
| }() | ||
| ch <- syscall.SIGWINCH | ||
| } |
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