1  #!/usr/bin/env sh
 2  
 3  set -eu
 4  
 5  ACTION="${1:-}"
 6  FLAG="${2:-}"
 7  
 8  if [ -z "$ACTION" ]; then
 9      echo "Error: missing argument" >&2
10      echo "Usage: $0 <action> [flags]" >&2
11      echo "" >&2
12      echo "Available actions:" >&2
13      echo "  ensure        Install and build all packages (without activation)" >&2
14      echo "  gc [--dry-run] Remove orphaned packages no longer needed by configuration" >&2
15      exit 1
16  fi
17  
18  # Determine the Backpack installation directory based on this script's location
19  # This makes the script work regardless of where it's called from
20  SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
21  BACKPACK_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
22  
23  # Verify this is actually a Backpack installation
24  if [ ! -f "$BACKPACK_DIR/ensure.el" ] || [ ! -d "$BACKPACK_DIR/base-packages" ]; then
25      echo "Error: This script must be run from the Backpack installation directory" >&2
26      echo "Expected to find ensure.el and base-packages/ in: $BACKPACK_DIR" >&2
27      exit 1
28  fi
29  
30  if [ "$ACTION" = "ensure" ]; then
31      echo "Backpack: Synchronizing packages..."
32      echo "Backpack directory: $BACKPACK_DIR"
33      echo ""
34      # Run Emacs in batch mode with ensure.el
35      # ensure.el handles loading backpack.el with sync mode enabled
36      emacs --batch \
37          --eval "(setq user-emacs-directory \"$BACKPACK_DIR/\")" \
38          -l "$BACKPACK_DIR/ensure.el"
39      exit $?
40  
41  elif [ "$ACTION" = "gc" ]; then
42      DRY_RUN="nil"
43      if [ "$FLAG" = "--dry-run" ] || [ "$FLAG" = "-n" ]; then
44          DRY_RUN="t"
45          echo "Backpack: Garbage collection (dry run)..."
46      else
47          echo "Backpack: Garbage collection..."
48      fi
49      echo "Backpack directory: $BACKPACK_DIR"
50      echo ""
51      # Run Emacs in batch mode with gc.el
52      emacs --batch \
53          --eval "(setq user-emacs-directory \"$BACKPACK_DIR/\")" \
54          --eval "(setq backpack-gc-dry-run $DRY_RUN)" \
55          -l "$BACKPACK_DIR/gc.el"
56      exit $?
57  
58  else
59      echo "Error: unknown action '$ACTION'" >&2
60      echo "Available actions: ensure, gc" >&2
61      exit 1
62  fi