49 - codespaces/

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/miniconda:0-3
+
+# Copy environment.yml (if found) to a temp location so we update the environment. Also
+# copy "noop.txt" so the COPY instruction does not fail if no environment.yml exists.
+COPY ../codespaces/demoVE.yml* ../codespaces/noop.txt /tmp/conda-tmp/
+RUN if [ -f "/tmp/conda-tmp/demoVE.yml" ]; then umask 0002 && /opt/conda/bin/conda env create -f /tmp/conda-tmp/demoVE.yml; fi \
+    && rm -rf /tmp/conda-tmp
+
+# [Optional] Uncomment to install a different version of Python than the default
+# RUN conda install -y python=3.6 \
+#     && pip install --no-cache-dir pipx \
+#     && pipx reinstall-all
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/miniconda
+{
+	"name": "Miniconda (Python 3)",
+	"build": { 
+		"context": "..",
+		"dockerfile": "Dockerfile"
+	},
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "python --version",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "conda init",
+
+	// Configure tool-specific properties.
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"python.defaultInterpreterPath": "/opt/conda/envs/demoVE"
+			},
+			"extensions": [
+				// "ms-python.python",
+				// "donjayamanne.python-extension-pack",
+				// "ms-toolsai.jupyter",
+				// "GitHub.codespaces",
+				// "ms-azuretools.vscode-docker",
+				// "UserName.vscode-markdownlint"
+			]
+		}
+	}
+}

codespaces/README.md

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+# Codespaces
+
+## New to codespaces?
+* [Start here](https://docs.github.com/en/codespaces). Learn the core concepts and how to get started.
+* [Quickstart for GitHub Codespaces](https://docs.github.com/en/codespaces/getting-started/quickstart).
+
+## Create codespaces  
+1. Open your repository and go to `Code`>`Codespaces`
+2. Select branch
+3. Create codespace on `branch-name`. #This will take 3-ish minutes to prebuild container
+
+The creation of codespace make use of 
+  * [Dockerfile](../.devcontainer/Dockerfile) 
+  * [devcontainer.json](../.devcontainer/devcontainer.json)
+  * [demoVE.yaml](demoVE.yml)
+  * [noop.txt](noop.txt)
+
+
+## (First time) Predefined dev container configuration
+1. Access the Visual Studio Code Command Palette (Shift+Command+P / Ctrl+Shift+P), then start typing "add dev". 
+Click Codespaces: Add Dev Container Configuration Files.
+2. Create a new config file
+3. Select container conf template: Miniconda (Python3)
+4. Select additional feature `Nothing`
+
+Creates: `docker_funny_name_ID`  https://github.com/codespaces/`docker_funny_name_ID`
+You can check in the terminal these commands: `conda info` and `conda env list`
+
+## (Already created) Running demo scripts 
+* Activate `docker_funny_name_ID`  https://github.com/codespaces/`docker_funny_name_ID`
+* Open notebook 
+* Select Kernel (top right icon)
+  * `Install enable suggested extensions Python + Jupyter`
+  * Python environment 
+  * demoVE (Python VERSION) /opt/conda/envs/demoVE/bin/python
+* Run notebook
+* Stop running container (bottom left menu)
+* Maybe go https://github.com/codespaces/ to delete it
+
+
+## References
+https://www.sckaiser.com/blog/2023/01/30/conda-codespaces.html  
+https://github.com/crazy4pi314/conda-devcontainer-demo  
+https://blog.shibayan.jp/entry/20220309/1646754054  
+https://www.youtube.com/watch?v=RIchFX_gYb0  
+https://github.com/microsoft/AI-For-Beginners/blob/main/.devcontainer/Dockerfile   
+* Prebuild configuration: https://github.com/mxochicale/code/settings/codespaces
+* https://docs.github.com/en/codespaces/setting-up-your-project-for-codespaces/adding-a-dev-container-configuration/introduction-to-dev-containers#using-a-predefined-dev-container-configuration
+

codespaces/demo.py

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+
+# https://blog.shibayan.jp/entry/20220309/1646754054
+
+import cv2
+print(cv2.__version__)
+
+source_image = cv2.imread('shibayan.png')
+gray_image = cv2.cvtColor(source_image, cv2.COLOR_BGR2GRAY)
+cv2.imwrite('output.png', gray_image)

codespaces/demoVE.yml

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+name: demoVE
+channels:
+  - conda-forge
+  - default
+dependencies:
+  - python==3.11.*
+  - pip
+  - pip:
+    - opencv-python-headless
+    - ipykernel # required for jupyter notebook in VS Code
+    - matplotlib