229d0684-34d0-40df-b041-28f937bf961b Implement dotfiles sync command with optional GPG encryption

.github/workflows/sync_dotfiles.yml

@@ -0,0 +1,34 @@
+name: Sync Dotfiles CI
+
+on:
+  push:
+    paths:
+      - 'sync_dotfiles.sh'
+      - 'dotfiles.yml'
+  pull_request:
+    paths:
+      - 'sync_dotfiles.sh'
+      - 'dotfiles.yml'
+  workflow_dispatch:
+
+jobs:
+  test-sync-script:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up GPG (Linux/macOS)
+        if: runner.os != 'Windows'
+        run: |
+          sudo apt-get update && sudo apt-get install -y gnupg || true
+          brew install gnupg || true
+
+      - name: Verify script runs (dry-run)
+        run: |
+          chmod +x ./sync_dotfiles.sh
+          ./sync_dotfiles.sh --push --dry-run

sync_dotfiles.sh

@@ -0,0 +1,137 @@
+#!/usr/bin/env bash
+# sync_dotfiles.sh - Synchronize dotfiles repository with remote and optional GPG encryption.
+# Usage: ./sync_dotfiles.sh [--pull|--push] [--dry-run]
+#   --pull      Pull changes from the configured remote.
+#   --push      Commit local changes and push to remote (default).
+#   --dry-run   Show actions without executing them.
+
+set -euo pipefail
+
+# Helper to print messages
+log() {
+    echo "[sync_dotfiles] $*"
+}
+
+# Determine repository root (directory containing this script)
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$REPO_ROOT"
+
+# Load configuration from dotfiles.yml
+CONFIG_FILE="dotfiles.yml"
+if [[ ! -f "$CONFIG_FILE" ]]; then
+    log "Configuration file $CONFIG_FILE not found."
+    exit 1
+fi
+
+# Simple YAML parsing using awk (expects flat keys under sync:)
+parse_yaml() {
+    local key=$1
+    awk -v key="$key" '
+        $1 == "sync:" {found=1; next}
+        found && $1 == key ":" {gsub(/^[ \t]+|[ \t]+$/,"",$3); print $3; exit}
+    ' "$CONFIG_FILE"
+}
+
+REMOTE=$(parse_yaml "remote")
+BRANCH=$(parse_yaml "branch")
+ENCRYPT=$(parse_yaml "encrypt")
+
+# Default values if not set
+REMOTE=${REMOTE:-origin}
+BRANCH=${BRANCH:-main}
+ENCRYPT=${ENCRYPT:-false}
+
+# Flags
+DRY_RUN=false
+ACTION="push"
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --pull)
+            ACTION="pull"
+            shift
+            ;;
+        --push)
+            ACTION="push"
+            shift
+            ;;
+        --dry-run)
+            DRY_RUN=true
+            shift
+            ;;
+        *)
+            log "Unknown argument: $1"
+            exit 1
+            ;;
+    esac
+done
+
+run() {
+    if $DRY_RUN; then
+        echo "[dry-run] $*"
+    else
+        eval "$@"
+    fi
+}
+
+git_pull() {
+    log "Pulling from $REMOTE/$BRANCH"
+    run "git fetch $REMOTE"
+    run "git checkout $BRANCH"
+    run "git pull $REMOTE $BRANCH"
+}
+
+git_commit_and_push() {
+    # Detect changes
+    if [[ -n "$(git status --porcelain)" ]]; then
+        COMMIT_MSG="Sync dotfiles: $(date '+%Y-%m-%d %H:%M:%S')"
+        log "Staging changes"
+        run "git add -A"
+        log "Committing: $COMMIT_MSG"
+        run "git commit -m \"$COMMIT_MSG\""
+    else
+        log "No changes to commit."
+    fi
+
+    # Optional encryption of the latest diff
+    if [[ "$ENCRYPT" == "true" ]]; then
+        # Ensure GPG is available
+        if ! command -v gpg >/dev/null 2>&1; then
+            log "GPG not found but encryption is enabled. Skipping encryption."
+        else
+            # Generate diff of the most recent commit (if any)
+            if git rev-parse HEAD~1 >/dev/null 2>&1; then
+                DIFF_FILE="dotfiles.diff"
+                ENC_FILE="${DIFF_FILE}.gpg"
+                log "Creating diff for encryption"
+                run "git diff HEAD~1 HEAD > $DIFF_FILE"
+                log "Encrypting diff with GPG"
+                run "gpg --yes --output $ENC_FILE --encrypt $DIFF_FILE"
+                log "Adding encrypted diff to repository"
+                run "git add $ENC_FILE"
+                run "git commit -m \"Add encrypted diff $(date '+%Y-%m-%d %H:%M:%S')\""
+                # Clean up plaintext diff
+                run "rm -f $DIFF_FILE"
+            else
+                log "Not enough history to create diff for encryption."
+            fi
+        fi
+    fi
+
+    log "Pushing to $REMOTE/$BRANCH"
+    run "git push $REMOTE $BRANCH"
+}
+
+case "$ACTION" in
+    pull)
+        git_pull
+        ;;
+    push)
+        git_commit_and_push
+        ;;
+    *)
+        log "Invalid action: $ACTION"
+        exit 1
+        ;;
+esac