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[homebrew] check for existing packages first #340

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[homebrew] check for existing packages first #340

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13 changes: 11 additions & 2 deletions share/ruby-install/package_manager.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -38,8 +38,17 @@ function install_packages()
pkg) $sudo pkg install -y "$@" || return $? ;;
brew)
local brew_owner="$(/usr/bin/stat -f %Su "$(command -v brew)")"
sudo -u "$brew_owner" brew install "$@" ||
sudo -u "$brew_owner" brew upgrade "$@" || return $?
local installed=$(sudo -u "$brew_owner" brew list -1)
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Since casks are now shown with brew list this should probably have a --formula flag.

local -a missing_pkgs

for dep in "$@"; do
[[ "$installed" =~ [[:space:]]"$dep" ]] || missing_pkgs+=($dep)
done

if (( ${#missing_pkgs[@]} > 0 )); then
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Would it be better to check formula one at a time with brew list --formula --version foo so the absence of one won't inadvertently upgrade another?

sudo -u "$brew_owner" brew install "${missing_pkgs[@]}" ||
sudo -u "$brew_owner" brew upgrade "${missing_pkgs[@]}" || return $?
fi
;;
pacman)
local missing_pkgs=($(pacman -T "$@"))
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