feat(devcontainer): deploy OMP to all shells,

.devcontainer/Dockerfile

@@ -8,16 +8,74 @@ FROM mcr.microsoft.com/vscode/devcontainers/go:0-${VARIANT}
 ARG NODE_VERSION="none"
 RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
 
-# Download the Microsoft repository GPG keys
-RUN wget https://packages.microsoft.com/config/debian/10/packages-microsoft-prod.deb
-# Register the Microsoft repository GPG keys
-RUN  dpkg -i packages-microsoft-prod.deb
+# Download and register the Microsoft repository GPG keys
+RUN wget https://packages.microsoft.com/config/debian/10/packages-microsoft-prod.deb && \
+    dpkg -i packages-microsoft-prod.deb && \
+    rm -f packages-microsoft-prod.deb
 
 # [Optional] Uncomment this section to install additional OS packages.
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-    && apt-get install -y --no-install-recommends fish\
-    && apt-get install -y --no-install-recommends powershell
+    && apt-get install -y --no-install-recommends \
+        fish \
+        powershell \
+        tmux \
+    && apt-get clean
 
+# Deploy latest stable oh-my-posh as a starting point:
+RUN pwsh -Command Install-Module oh-my-posh -Scope AllUsers -Force && \
+    chmod 777 -R /usr/local/share/powershell
+# If you recompile the prompt in the devcontainer you may overwrite the executables at:
+# /usr/local/share/powershell/Modules/oh-my-posh/<version>/bin/
+
+# Deploy symlink of binary under /usr/bin/oh-my-posh for convenience access from non-Powershell shells:
+RUN export ARCH=`uname -m`;\
+    if [[ "$ARCH" -eq "aarch64" ]]; then \
+        export POSH_BIN="$(find /usr/local/share/powershell/Modules/oh-my-posh/*/bin/posh-linux-arm64)";\
+    elif [[ "$ARCH" -eq "armv7l" ]]; then \
+        export POSH_BIN="$(find /usr/local/share/powershell/Modules/oh-my-posh/*/bin/posh-linux-arm)";\
+    else \
+        export POSH_BIN="$(find /usr/local/share/powershell/Modules/oh-my-posh/*/bin/posh-linux-amd64)";\
+    fi;\
+    ln -sf $POSH_BIN /usr/bin/oh-my-posh
+# NOTE: devcontainers are Linux-only at this time but when
+# Windows or Darwin is supported someone will need to improve
+# the code logic above.
+
+# Deploy all latest oh-my-posh themes at devcontainer build time:
+ARG USERNAME=vscode
+ARG POSHTHEMES_ROOT=/home/${USERNAME}/.poshthemes
+ENV POSHTHEMES_ROOT=${POSHTHEMES_ROOT}
+RUN mkdir -m=777 -p ${POSHTHEMES_ROOT} && \
+    wget https://github.com/JanDeDobbeleer/oh-my-posh/releases/latest/download/themes.zip -O ${POSHTHEMES_ROOT}/themes.zip && \
+    unzip ${POSHTHEMES_ROOT}/themes.zip -d ${POSHTHEMES_ROOT} && \
+    chmod 777 ${POSHTHEMES_ROOT}/*.json && \
+    rm ${POSHTHEMES_ROOT}/themes.zip
+
+# Can be used to override the devcontainer prompt default theme:
+ARG DEFAULT_POSH_THEME=jandedobbeleer
+ENV DEFAULT_POSH_THEME=${DEFAULT_POSH_THEME}
+
+# Deploy oh-my-posh prompt to Powershell:
+COPY Microsoft.PowerShell_profile.ps1 /home/${USERNAME}/.config/powershell/Microsoft.PowerShell_profile.ps1
+
+# Deploy oh-my-posh prompt to Fish:
+COPY config.fish /home/${USERNAME}/.config/fish/config.fish
+
+# Everything runs as root during build time, so we want
+# to make sure the vscode user can edit these paths too:
+RUN chmod 777 -R /home/${USERNAME}/.config
+
+# Override vscode's own Bash prompt with oh-my-posh:
+RUN sed -i 's/^__bash_prompt$/#&/' /home/${USERNAME}/.bashrc && \
+    echo "eval \"\$(oh-my-posh --init --shell bash --config ${POSHTHEMES_ROOT}/${DEFAULT_POSH_THEME}.omp.json)\"" >> /home/${USERNAME}/.bashrc
+
+# Override vscode's own ZSH prompt with oh-my-posh:
+RUN sed -i 's/^source \$ZSH/oh-my-zsh.sh$/# source \$ZSH/oh-my-zsh.sh&/' /home/${USERNAME}/.zshrc && \
+    echo "eval \"\$(oh-my-posh --init --shell zsh --config ${POSHTHEMES_ROOT}/${DEFAULT_POSH_THEME}.omp.json)\"" >> /home/${USERNAME}/.zshrc
+
+# Set container timezone:
+ARG TZ="UTC"
+RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime
 
 # [Optional] Uncomment the next line to use go get to install anything else you need
 # RUN go get -x github.com/JanDeDobbeleer/battery

.devcontainer/Microsoft.PowerShell_profile.ps1

@@ -0,0 +1,5 @@
+# Activate oh-my-posh prompt:
+Import-Module oh-my-posh
+Set-PoshPrompt -Theme ${env:POSHTHEMES_ROOT}/${env:DEFAULT_POSH_THEME}.omp.json
+
+# NOTE: You can override the above env vars from the devcontainer.json "args" under the "build" key.

.devcontainer/config.fish

@@ -0,0 +1,4 @@
+# Activate oh-my-posh prompt:
+oh-my-posh --init --shell fish --config $POSHTHEMES_ROOT/$DEFAULT_POSH_THEME.omp.json | source
+
+# NOTE: You can override the above env vars from the devcontainer.json "args" under the "build" key.

.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
 // https://github.com/microsoft/vscode-dev-containers/tree/v0.177.0/containers/go
 {
-  "name": "Go",
+  "name": "oh-my-posh",
   "build": {
     "dockerfile": "Dockerfile",
     "args": {
@@ -9,7 +9,16 @@
       // Append -bullseye or -buster to pin to an OS version.
       // Use -bullseye variants on local arm64/Apple Silicon.
       "VARIANT": "1.17-bullseye",
-      // Options
+
+      // Options:
+
+      "DEFAULT_POSH_THEME": "jandedobbeleer",
+
+      // Override me with your own timezone:
+      "TZ": "UTC",
+      // Use one of the "TZ database name" entries from:
+      // https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+
       "NODE_VERSION": "lts/*"
     }
   },
@@ -43,19 +52,22 @@
     "terminal.integrated.defaultProfile.linux": "pwsh",
     "terminal.integrated.defaultProfile.windows": "pwsh",
     "terminal.integrated.defaultProfile.osx": "pwsh",
+    "tasks.statusbar.default.hide": true
   },
 
   // Add the IDs of extensions you want installed when the container is created.
   "extensions": [
+    "actboy168.tasks",
     "eamodio.gitlens",
-    "github.vscode-pull-request-github",
-    "esbenp.prettier-vscode",
-    "davidanson.vscode-markdownlint",
-    "yzhang.markdown-all-in-one",
     "bungcip.better-toml",
-    "redhat.vscode-yaml",
+    "davidanson.vscode-markdownlint",
+    "editorconfig.editorconfig",
+    "esbenp.prettier-vscode",
+    "github.vscode-pull-request-github",
     "golang.go",
-    "ms-vscode.powershell"
+    "ms-vscode.powershell",
+    "redhat.vscode-yaml",
+    "yzhang.markdown-all-in-one"
   ],
 
   // Use 'forwardPorts' to make a list of ports inside the container available locally.

.vscode/tasks.json

@@ -17,6 +17,27 @@
       },
       "problemMatcher": "$go",
       "args": ["build", "-v"]
+    },
+    {
+      "type": "shell",
+      "command": "go",
+      "label": "devcontainer: build omp",
+      "options": {
+        "cwd": "${workspaceRoot}/src",
+        "shell": {
+          "executable": "bash",
+          "args": ["-c"]
+        },
+        "statusbar": {
+          "hide": false,
+          "color" : "#22C1D6",
+          "label" : "$(beaker) devcontainer: build omp",
+          "tooltip": "Compiles *oh-my-posh* from this repo while **overwriting** your preinstalled stable release."
+        }
+      },
+      "group": "build",
+      "problemMatcher": "$go",
+      "args": ["build", "-v", "-o", "`readlink", "/usr/bin/oh-my-posh`"]
     }
   ]
 }

CONTRIBUTING.md

@@ -14,6 +14,42 @@ can be a good starting point.
    or core functionality.
 4. Pull Requests are merged once all checks pass and a project maintainer has approved it.
 
+## Codespaces / Devcontainer Development Environment
+
+Arguably the easiest way to contribute anything is to use our prepared development environment.
+
+We have a `.devcontainer/devcontainer.json` file, meaning we are compatible with:
+
+- [Github Codespaces][codespaces], or
+- the [Visual Studio Code Remote - Containers][devcontainer-ext] extension.
+
+This Linux environment includes all shells supported by oh-my-posh, including Bash, ZSH,
+Fish and PowerShell, the latter of which is the default.
+
+### Configuring Devcontainer's Timezone & Theme
+
+1. Open the `.devcontainer/devcontainer.json` file and in the "*build*" section modify:
+
+   - `TZ`: with [your own timezone][timezones]
+   - `DEFAULT_POSH_THEME`: with [your preferred theme][themes]
+
+2. Summon the Command Panel (Ctrl+Shift+P) and select `Codespaces: Rebuild Container`
+   to rebuild your devcontainer. (This should take just a few seconds.)
+
+### Recompiling oh-my-posh within
+
+The devcontainer definition preinstalls the latest stable oh-my-posh release at build time.
+
+To overwrite the installation's version inside the running devcontainer, you may use the
+VSCode *task* `devcontainer: build omp` to rebuild your oh-my-posh with that of
+your running repository's state. (You might see a button for this in your statusbar.)
+
+If the compile succeeds, `oh-my-posh --version` should reply:
+`development`
+
+Should you somehow mess up your devcontainer's OMP install catastrophically, remember that
+if you do `Codespaces: Rebuild Container` again, you'll be back to the latest stable release.
+
 ## Code of Conduct
 
 ### Our Pledge
@@ -33,23 +69,23 @@ diverse, inclusive, and healthy community.
 Examples of behavior that contributes to a positive environment for the
 project include:
 
-* Demonstrating empathy and kindness toward other people
-* Being respectful of differing opinions, viewpoints, and experiences
-* Giving and gracefully accepting constructive feedback
-* Accepting responsibility and apologizing to those affected by our mistakes,
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes,
   and learning from the experience
-* Focusing on what is best not just for us as individuals, but for the
+- Focusing on what is best not just for us as individuals, but for the
   project
 
 Examples of unacceptable behavior include:
 
-* The use of sexualized language or imagery, and sexual attention or
+- The use of sexualized language or imagery, and sexual attention or
   advances of any kind
-* Trolling, insulting or derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or email
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or email
   address, without their explicit permission
-* Other conduct which could reasonably be considered inappropriate in a
+- Other conduct which could reasonably be considered inappropriate in a
   professional setting
 
 ### Enforcement Responsibilities
@@ -142,3 +178,7 @@ enforcement ladder](https://github.com/mozilla/diversity).
 [homepage]: https://www.contributor-covenant.org
 [conduct]: mailto:conduct@ohmyposh.dev
 [coc]: https://www.contributor-covenant.org/version/2/0/code_of_conduct.html
+[codespaces]: https://github.com/features/codespaces
+[devcontainer-ext]: https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers
+[timezones]: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+[themes]: https://ohmyposh.dev/docs/themes