89 lines
5.3 KiB
Markdown
89 lines
5.3 KiB
Markdown
# Try Out Development Containers: Go
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This is a sample project that lets you try out the **[VS Code Remote - Containers](https://aka.ms/vscode-remote/containers)** extension in a few easy steps.
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> **Note:** If you're following the quick start, you can jump to the [Things to try](#things-to-try) section.
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## Setting up the development container
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Follow these steps to open this sample in a container:
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1. If this is your first time using a development container, please follow the [getting started steps](https://aka.ms/vscode-remote/containers/getting-started).
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2. To use this repository, you can either open a locally cloned copy of the code:
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- Clone this repository to your local filesystem.
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- Press <kbd>F1</kbd> and select the **Remote-Containers: Open Folder in Container...** command.
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- Select the cloned copy of this folder, wait for the container to start, and try things out!
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Or open the repository in an isolated Docker volume:
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- Press <kbd>F1</kbd> and select the **Remote-Containers: Try a Sample...** command.
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- Choose the "Go" sample, wait for the container to start and try things out!
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> **Note:** Under the hood, this will use **Remote-Containers: Open Repository in Container...** command to clone the source code in a Docker volume instead of the local filesystem.
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## Things to try
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Once you have this sample opened in a container, you'll be able to work with it like you would locally.
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> **Note:** This container runs as a non-root user with sudo access by default. Comment out `"remoteUser": "vscode"` in `.devcontainer/devcontainer.json` if you'd prefer to run as root.
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Some things to try:
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1. **Edit:**
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- Open `server.go`
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- Try adding some code and check out the language features.
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2. **Terminal:** Press <kbd>ctrl</kbd>+<kbd>shift</kbd>+<kbd>\`</kbd> and type `uname` and other Linux commands from the terminal window.
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3. **Build, Run, and Debug:**
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- Open `server.go`
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- Add a breakpoint (e.g. on line 22).
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- Press <kbd>F5</kbd> to launch the app in the container.
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- Once the breakpoint is hit, try hovering over variables, examining locals, and more.
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- Continue, then open a local browser and go to `http://localhost:9000` and note you can connect to the server in the container.
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4. **Forward another port:**
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- Stop debugging and remove the breakpoint.
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- Open `server.go`
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- Change the server port to 5000. (`portNumber := "5000"`)
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- Press <kbd>F5</kbd> to launch the app in the container.
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- Press <kbd>F1</kbd> and run the **Forward a Port** command.
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- Select port 5000.
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- Click "Open Browser" in the notification that appears to access the web app on this new port.
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5. **Refactoring - rename:**
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- Open `hello.go`, select method name `Hello` press <kbd>F1</kbd> and run the **Rename Symbol** command.
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6. **Refactoring - extract:**
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- Open `hello.go` and select string, press <kbd>F1</kbd> and run the **Go: Extract to variable** command.
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- Open `hello.go` and select line with return statement, press <kbd>F1</kbd> and run the **Go: Extract to function** command.
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7. **Generate tests:**
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- Open `hello.go` and press <kbd>F1</kbd> and run the **Go: Generate Unit Tests For File** command.
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- Implement a test case: Open file `hello_test.go` and edit the line with the `TODO` comment: `{"hello without name", "Hello, "},`
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- You can toggle between implementation file and test file with press <kbd>F1</kbd> and run the **Go: Toggle Test File**
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- Tests can also run as benchmarks: Open file `hello_test.go`, press <kbd>F1</kbd> and run the **Go: Benchmark File**
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8. **Stub generation:** ( [details](https://github.com/josharian/impl))
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- define a struct `type mock struct {}`, enter a new line , press <kbd>F1</kbd> and run the **Go: Generate interface stubs** command.
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- edit command `m *mock http.ResponseWriter`
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9. **Fill structs:** ([details](https://github.com/davidrjenni/reftools/tree/master/cmd/fillstruct))
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- Open `hello.go` and select `user{}` of variable asignment, press <kbd>F1</kbd> and run the **Go: Fill struct** command.
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10. **Add json tags to structs:** ([details](https://github.com/fatih/gomodifytags))
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- Open `hello.go` and go with cursor in to a struct, press <kbd>F1</kbd> and run the **Go: Add Tags To Struct Fields** command.
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## Contributing
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This project welcomes contributions and suggestions. Most contributions require you to agree to a
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Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
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the rights to use your contribution. For details, visit https://cla.microsoft.com.
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When you submit a pull request, a CLA-bot will automatically determine whether you need to provide
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a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions
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provided by the bot. You will only need to do this once across all repos using our CLA.
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This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
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For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
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contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
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## License
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Copyright © Microsoft Corporation All rights reserved.<br />
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Licensed under the MIT License. See LICENSE in the project root for license information.
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