dsh-msys2-bash-executor

dsh-msys2-bash-executor

中文说明

A standalone, configurable Bash executor for DeepSeek Harness on Windows. It can run agent shell calls through MSYS2/UCRT64 Bash or Git Bash, and adds a visual configuration card to the DSH Web settings page.

This package does not depend on dsh-anchored-standard or dsh-anchored-standard-bash. Its bundle registers one isolated global Bash tool and can expose it globally or only to selected preset IDs.

Features

• Direct argv spawning through DSH's managed subprocess service. It does not use Node's shell: true mode.
• Automatic detection of MSYS2, UCRT64, Git Bash, and bash on PATH.
• Configurable executable, Bash arguments, PATH prefixes, and environment variables.
• Foreground timeouts, abort handling, bounded output, spill files, background jobs, incremental reads, and process-tree termination.
• DSH Web settings card with English and Chinese copy.
• Global activation or per-preset activation for Standard, Code, Cordis, Minimal, and custom preset IDs.
• Minimal-specific shadowing that bypasses DSH's unsupported Windows persistent-terminal inspection path.
• The Host PowerShell provider remains installed for presets where Bash is disabled.

Security

This executor is unsandboxed. Commands run with the full permissions of the DSH process, equivalent to danger-full-access. It does not provide the Windows ACL sandbox used by the stock PowerShell sandbox executor.

Only use it with trusted prompts, repositories, and tools.

Install from a local package

The package is not published to npm yet. Build and pack it locally:

npm.cmd run check
npm.cmd pack
dsh plugin --profile web add "C:\path\to\dsh-msys2-bash-executor-0.1.1.tgz"

To build from GitHub:

git clone https://github.com/3223698962/dsh-msys2-bash-executor.git
cd dsh-msys2-bash-executor
npm.cmd install
npm.cmd run check
npm.cmd pack --cache .npm-cache
dsh plugin --profile web add "C:\path\to\dsh-msys2-bash-executor-0.1.1.tgz"

Restart dsh web after installing or updating the plugin. Activation changes affect newly created sessions; running sessions keep the tool set they started with.

Configure in DSH Web

Open Settings, then Plugins, then the configurable plugins tab. The MSYS2 / Git Bash card provides:

• Use Bash for every preset: expose global bash and hide pwsh in all newly created sessions.
• Preset activation: independently enable Standard, Code, Cordis, Minimal, or any custom preset ID when global mode is off.
• Bash executable: for example C:\msys64\usr\bin\bash.exe or C:\Program Files\Git\bin\bash.exe.
• Bash arguments: JSON array placed before the command. The normal value is ["-c"].
• PATH entries to prepend: one Windows path per line.
• Environment variables: a JSON object containing string values.

For UCRT64 when DSH was not started from an existing UCRT64 terminal, a typical configuration is:

Bash executable:
C:\msys64\usr\bin\bash.exe

PATH entries to prepend:
C:\msys64\ucrt64\bin
C:\msys64\usr\bin

Environment variables:
{"MSYSTEM":"UCRT64","CHERE_INVOKING":"1"}

Settings are stored in the package-owned msys2-bash namespace. This keeps Bash activation and launch configuration independent from the Host PowerShell provider. The Web card reads and writes that namespace through the plugin's own typed Remote, because DSH 0.1.0-rc.6 exposes only a fixed built-in namespace allowlist through its generic settings API.

When Bash is enabled for Minimal, the plugin registers the standalone Bash definition in the agent's nearest tool layer. That shadows Minimal's built-in persistent Bash tool and avoids subprocess-local: terminal inspection is unsupported on platform win32. Shell state is therefore not persistent between calls in this mode.

Activation model

The bundle mounts an isolated Bash executor and @deepseek-ai/dsh-tool-bash at the Host layer. For each newly created agent it reads the effective preset ID:

• enabled preset: expose global bash and hide inherited pwsh;
• disabled preset: hide global bash when it would otherwise be visible;
• Minimal enabled: shadow the persistent terminal tool with the standalone Bash definition;
• Minimal disabled: leave its stock persistent tool untouched.

Set globalEnabled: true to cover every preset, or keep it false and list IDs in enabledPresets.

Manual preset mount

Add an isolated shell group to the preset's agent.cordis.yml:

- id: shell-bash
  name: cordis:group
  group: true
  isolate:
    shell: true
  config:
    - id: msys2-bash-executor
      name: dsh-msys2-bash-executor/bash-executor
      disabled: !!js process.platform !== 'win32'

    - id: tool-bash
      name: '@deepseek-ai/dsh-tool-bash'

The shell isolation is required because the executor provides ctx.shell. Mounting another shell provider in the same realm as the Host PowerShell provider causes a duplicate-service error.

On non-Windows systems, the recommended disabled expression leaves the executor off and lets tool-bash resolve the Host Bash provider. Remove the expression only when an unsandboxed local Bash executor is also desired there.

Resolution order

If the executable field is empty, the resolver checks:

1. DSH_BASH_PATH.
2. MSYS2_ROOT and MSYS_ROOT.
3. C:\msys64\usr\bin\bash.exe and C:\msys64\ucrt64\bin\bash.exe.
4. Git Bash under Program Files and Local AppData.
5. Each Windows PATH entry.
6. The command name bash.

An explicitly configured executable is always used as-is, so a bad path fails visibly at spawn time.

Scope

This plugin changes DSH agent tool visibility inside the Web profile. It does not reconfigure external Codex CLI or Claude Code subprocess providers. Those products need their own shell or environment configuration, although they can independently invoke the same MSYS2/Git Bash executable.

Development

npm.cmd run build
npm.cmd test
npm.cmd run check
npm.cmd run pack:dry

src/client.js is the browser source. scripts/build-client.mjs generates lib/client.js in the window.__ModuleLoader__ format required by DSH Web.

Troubleshooting

• If Bash starts in the wrong MSYS2 subsystem, set MSYSTEM and prepend the matching toolchain directory.
• Use Windows paths in the settings card because the executable is spawned by Windows Node.
• Start DSH with Windows-native Node. The MSYS2 build of Node is not compatible with the current DSH Windows launcher.
• Node warning DEP0190 is not emitted by this executor: it passes a complete argv to DSH subprocess and never sets shell: true. Trace that warning to the plugin that calls child_process.spawn with both an argument array and shell: true.

License

MIT. See LICENSE and NOTICE.