better /usr/local/bin checks with test

Author: jhheider

.github/workflows/ci.yml

@@ -154,6 +154,14 @@ jobs:
         # ^^ we run as `runner` but this dir has 999 perms
         - run: ./install.sh
 
+  no-usr-local:
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v3
+        - run: sudo rm -rf /usr/local # this is fine, right?
+        - run: sudo chmod 777 /usr    # and this
+        - run: ./install.sh
+
   installs-if-gitea-found:
     runs-on: ubuntu-latest
     steps:

README.md

@@ -2,7 +2,7 @@
 
 [`install.sh`](./install.sh) is delivered when you `curl tea.xyz`.
 
-# GitHub Action 0.7.0
+# GitHub Action 0.7.1
 
 This repository also provides the `tea` GitHub Action.
 

install.sh

@@ -283,7 +283,9 @@ check_path() {
 	then
 		echo  #spacer
 
-		if test -w /usr/local/bin -o -w /usr/local -a ! -d /usr/local/bin
+		# Shellcheck thinks `>/dev/null` was supposed to be `-gt /dev/null` here. For some reason.
+		# shellcheck disable=2065
+		if test -w /usr/local/bin -o ! -e /usr/local/bin -a mkdir -p /usr/local/bin >/dev/null 2>&1
 		then
 			mkdir -p /usr/local/bin
 			ln -sf "$tea" /usr/local/bin/tea