Enable git autocomplete in the devcontainer

.devcontainer/devcontainer.json

@@ -8,7 +8,9 @@
   "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
 
   // Features to add to the dev container. More info: https://containers.dev/features.
-  // "features": {},
+  "features": {
+    "./git-autocomplete": "1.0.0",
+  },
   // Configure tool-specific properties.
   "customizations": {
     // Configure properties specific to VS Code.

.devcontainer/git-autocomplete/devcontainer-feature.json

@@ -0,0 +1,6 @@
+{
+  "name": "Git Autocomplete",
+  "id": "git-autocomplete",
+  "version": "1.0.0",
+  "description": "Enable git autocomplete in the shell",
+}

.devcontainer/git-autocomplete/install.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+UPDATE_RC="${UPDATE_RC:-"true"}"
+AUTOCOMPLETE_SOURCE="source /usr/share/bash-completion/completions/git"
+
+if [ "${UPDATE_RC}" = "true" ]; then
+    echo "Updating /etc/bash.bashrc and /etc/zsh/zshrc..."
+    if [[ "$(cat /etc/bash.bashrc)" != *"${AUTOCOMPLETE_SOURCE}"* ]]; then
+        echo -e "${AUTOCOMPLETE_SOURCE}" >> /etc/bash.bashrc
+    fi
+    if [ -f "/etc/zsh/zshrc" ] && [[ "$(cat /etc/zsh/zshrc)" != *"${AUTOCOMPLETE_SOURCE}"* ]]; then
+        echo -e "${AUTOCOMPLETE_SOURCE}" >> /etc/zsh/zshrc
+    fi
+fi