Fix: Changes to have command usage

scripts/install-gh-extensions.sh

@@ -39,4 +39,7 @@ have gh && {
   done
 
   msg_ok "Done"
-} || msg_err "gh (GitHub Client) could not be found, please install it first"
+}
+
+! have gh \
+  && msg_err "gh (GitHub Client) could not be found, please install it first"

scripts/install-go-packages.sh

@@ -34,4 +34,6 @@ have go && {
   done
 
   msg_ok "Done"
-} || msg "go hasn't been installed yet."
+}
+
+! have go && msg "go hasn't been installed yet."

scripts/install-npm-packages.sh

@@ -36,4 +36,6 @@ have npm && {
   msg_run "Upgrading all global packages"
   npm -g --no-progress --no-timing --no-fund outdated
   npm -g --no-timing --no-fund upgrade
-} || msg_err "npm could not be found."
+}
+
+! have npm && msg_err "npm could not be found."

scripts/install-ntfy.sh

@@ -6,9 +6,9 @@
 source "$HOME/.dotfiles/scripts/shared.sh"
 set -e
 
-have ntfy && {
-  msg "ntfy already installed"
-} || {
+have ntfy && msg "ntfy already installed"
+
+! have ntfy && {
   case $(dfm check arch) in
     Linux)
       NTFY_ARCH="linux_$(arch)"

scripts/install-xcode-cli-tools.sh

@@ -4,6 +4,12 @@
 # Ismo Vuorinen <https://github.com/ivuorinen> 2018
 #
 
+[ "$(uname)" != "Darwin" ] && echo "Not a macOS system" && exit 0
+
+! have xcode-select \
+  && msg_err "xcode-select could not be found, skipping" \
+  && exit 0
+
 # Ask for the administrator password upfront
 sudo -v