Adds install script

Author: jonesiscoding

bin/install.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+#!/bin/bash
+
+## region ############################################## Destination
+
+# Allow setting of destination via prefix, verify that it's writable
+destDir="/usr/local/sbin"
+[ -n "$LOCAL_SBIN" ] && destDir="$LOCAL_SBIN"
+if [ ! -w "$destDir" ]; then
+
+  # Exit with error if this was specified path
+  [ -n "$LOCAL_SBIN" ] && exit 1
+
+  # Otherwise use an alternate path
+  userDir=$(/usr/bin/dscl . -read /Users/"$USER" NFSHomeDirectory 2>/dev/null | /usr/bin/awk -F ': ' '{print $2}')
+  if [ -z "$userDir" ] && [ -d "/Users/$USER/Desktop" ]; then
+    userDir="/Users/$USER/Desktop"
+  fi
+
+  destDir="$userDir/.local/sbin"
+fi
+
+## endregion ########################################### End Destination
+
+## region ############################################## Main Code
+
+installed=""
+if [ -f "$destDir/user-defaults" ]; then
+  installed="$("$destDir/user-defaults" --version | cut -d' ' -f2)"
+  if [ "$1" == "--replace" ]; then
+    installed=""
+    rm "$destDir/user-defaults" || exit 1
+  fi
+fi
+
+repoUrl="https://github.com/jonesiscoding/user-defaults/releases/latest"
+effectiveUrl=$(curl -Ls -o /dev/null -I -w '%{url_effective}' "$repoUrl")
+tag=$(echo "$effectiveUrl" | /usr/bin/rev | /usr/bin/cut -d'/' -f1 | /usr/bin/rev)
+[ "$tag" == "releases" ] && tag="v1.0"
+if [ -n "$tag" ]; then
+  # Exit successfully if same version
+  [ "$tag" == "$installed" ] && exit 0
+  dlUrl="https://github.com/jonesiscoding/user-defaults/archive/refs/tags/${tag}.zip"
+  repoFile=$(basename "$dlUrl")
+  tmpDir="/private/tmp/user-defaults/${tag}"
+  [ -d "$tmpDir" ] && rm -R "$tmpDir"
+  if mkdir -p "$tmpDir"; then
+    if curl -Ls -o "$tmpDir/$repoFile" "$dlUrl"; then
+      cd "$tmpDir" || exit 1
+      if unzip -qq "$tmpDir/$repoFile"; then
+        rm "$tmpDir/$repoFile"
+        if cp "$tmpDir/user-defaults-${tag//v/}/src/user-defaults" "$destDir/"; then
+          rm -R "$tmpDir"
+          # Success - Exit Gracefully
+          exit 0
+        fi
+      fi
+    fi
+  fi
+fi
+
+# All Paths that lead here indicate we couldn't install
+exit 1
+
+## endregion ########################################### End Main Code