Init installation script

Author: rockstaedt

README.md

@@ -11,21 +11,14 @@ long.
 
 ## Installation
 
-Execute the command for your platform within the root folder of your git 
-project. This will download the latest release, puts it in the `./.git/hooks/`
-folder and makes it executable. See git documentation about hooks for 
+Execute the command within the root folder of your git 
+project. This will download the installation script that determines the OS and
+downloads the latest binary. Afterwards, the initialization is started and the 
+corresponding hook files are prepared. See git documentation about hooks for 
 further [reference](https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks).
 
-### MacOS
-
-```shell
-curl -o .git/hooks/commit-msg  -L https://github.com/rockstaedt/commit-message-check/releases/download/v0.0.4/commit-message-check-v0.0.4-darwin-arm64 && chmod +x .git/hooks/commit-msg
-```
-
-### Linux
-
 ```shell
-curl -o .git/hooks/commit-msg -L https://github.com/rockstaedt/commit-message-check/releases/download/v0.0.4/commit-message-check-v0.0.4-linux-amd64 && chmod +x .git/hooks/commit-msg
+curl -o install.sh  -L https://raw.githubusercontent.com/rockstaedt/commit-message-check/main/install.sh && chmod +x ./install.sh && ./install.sh
 ```
 
 ## Usage

install.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+version=$(curl --silent "https://api.github.com/repos/rockstaedt/commit-message-check/releases/latest" |
+    grep '"tag_name":' |
+    sed -E 's/.*"([^"]+)".*/\1/')
+
+echo "-> Installing commit-message-check ${version}"
+
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+  os="linux"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+  os="darwin"
+else
+  echo "ERROR - Could not determine operating system. Please download binary manually."
+  exit
+fi
+
+os="${os}-$(uname -m)"
+binary="commit-message-check-${version}-${os}"
+url="https://github.com/rockstaedt/commit-message-check/releases/latest/download/${binary}"
+
+curl -o commit-message-check -L $url && chmod +x ./commit-message-check
+
+if !(grep -Fxq "commit-message-check" .gitignore); then
+  read -e -p "Do you want to add the binary to gitignore? (y/n) " choice
+  [[ "$choice" == [Yy]* ]] && echo 'commit-message-check'>>.gitignore
+fi
+
+./commit-message-check init
+
+rm ./install.sh