brew: make it easier to install optional tools

README.md

@@ -7,5 +7,5 @@ My personal configuration files.
 1. Clone this repository into `~/dotfiles`
 2. Install [Homebrew](https://brew.sh/): `./install-brew.sh`
 3. Install tools: `brew bundle install --file=brew/Brewfile`
-4. (Optional) Install more tools: `brew bundle install --file=brew/opt/Brewfile`
+4. Install optional tools: `brew/install-extra.sh [--casks]`
 5. Install everything else, including symlinks: `./install.sh`

brew/install-extra.fish

@@ -0,0 +1,44 @@
+#!/usr/bin/env fish
+
+# TODO: how to handle other taps (especially an issue for casks)
+
+function _install_extra_brews --argument-names favorite_brews
+    set --local brew_pkgs_installed (string collect (brew list))
+    set --local brew_pkgs_options
+    for brew_pkg in (cat $favorite_brews)
+        if not contains -- $brew_pkg $brew_pkgs_installed
+            set -a brew_pkgs_options $brew_pkg
+        end
+    end
+    set --local brew_pkgs_inst (string split ' ' -- $brew_pkgs_options | eval "fzf --prompt='[brew:install] '")
+    if test (count $brew_pkgs_inst) -gt 0
+        echo "Installing: $brew_pkgs_inst"
+        brew install $brew_pkgs_inst
+    end
+end
+
+function _install_extra_casks --argument-names favorite_casks
+    set --local brew_casks_installed (string collect (brew cask list))
+    set --local brew_casks_options
+    for brew_cask in (cat $favorite_casks)
+        if not contains -- $brew_cask $brew_casks_installed
+            set -a brew_casks_options $brew_cask
+        end
+    end
+    set --local brew_casks_inst (string split ' ' -- $brew_casks_options | eval "fzf --prompt='[brew:install] '")
+    if test (count $brew_casks_inst) -gt 0
+        echo "Installing: $brew_casks_inst"
+        brew cask install $brew_casks_inst
+    end
+end
+
+set --local script_dir (dirname (status -f))
+
+if contains -- '--casks' $argv
+    _install_extra_casks (string join '/' -- $script_dir 'casks.txt')
+else
+    _install_extra_brews (string join '/' -- $script_dir 'brews.txt')
+end
+
+functions --erase _install_extra_brews
+functions --erase _install_extra_casks