feat: add 'just add <group> <pkg>' recipe

Appends the package to meta/<group>.txt (if not already present) and
installs it via paru --needed. Equivalent to chezmoi add for packages.

2 files changed, 18 insertions, 1 deletions

diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 5f53abb..30c6c19 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -15,7 +15,7 @@ The repo root is a chezmoi source directory. Files targeting `$HOME` use chezmoi
 - `create-efi.sh` is an interactive EFI boot entry creation script using `efibootmgr`.
 - `.chezmoiignore` excludes non-home files (`etc/`, `meta/`, `firefox/`, docs) from deployment to `$HOME`.
 - `.githooks/` contains git hooks (notably `post-commit` which runs `chezmoi apply`). Activate with `just install-hooks`.
-- `justfile` provides recipes: `install-hooks`, `apply`, `install`, `install-all`, `status`.
+- `justfile` provides recipes: `install-hooks`, `apply`, `install`, `install-all`, `add`, `status`.
 
 ## Window manager
 
diff --git a/justfile b/justfile
index c14a8fc..fe1cc65 100644
--- a/justfile
+++ b/justfile
@@ -18,6 +18,23 @@ install-all:
     #!/bin/sh
     cat meta/*.txt | grep -v '^\s*#' | grep -v '^\s*$' | sort -u | paru -S --needed -
 
+# Add a package to a group and install it (e.g. just add dev ripgrep)
+add group pkg:
+    #!/bin/sh
+    set -eu
+    file="meta/{{ group }}.txt"
+    if [ ! -f "$file" ]; then
+        echo "error: $file does not exist" >&2
+        exit 1
+    fi
+    if grep -qxF '{{ pkg }}' "$file"; then
+        echo "{{ pkg }} already in {{ group }}.txt"
+    else
+        echo '{{ pkg }}' >> "$file"
+        echo "added {{ pkg }} to {{ group }}.txt"
+    fi
+    paru -S --needed '{{ pkg }}'
+
 # Show package and dotfile drift
 status:
     #!/bin/sh