chore(release): add install script and update README

- Add install.sh script to simplify installation
- Update README with instructions for quick install
- Add downloads section with links to latest binary releases
- Improve formatting and structure of README

BREAKING CHANGE: The manual installation instructions have changed. Users should now use the quick install script or download the latest binary release.

.github/workflows/release.yml

@@ -49,7 +49,12 @@ jobs:
           body: |
             ${{ steps.release_notes.outputs.result }}
             
-            ## Downloads
+            ## Quick Install
+            ```bash
+            curl -fsSL https://raw.githubusercontent.com/${{ github.repository }}/main/scripts/install.sh | bash
+            ```
+            
+            ## Manual Downloads
             - [macOS ARM64 (M1/M2)](https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/auto-commit-darwin-arm64)
             - [macOS Intel](https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/auto-commit-darwin-x64)
             - [Windows](https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}/auto-commit-windows-x64.exe)
@@ -67,3 +72,4 @@ jobs:
             dist/auto-commit-darwin-x64
             dist/auto-commit-windows-x64.exe
             dist/auto-commit-linux-x64
+            scripts/install.sh

README.md

@@ -15,7 +15,18 @@ Automatically generate git commit messages using Claude 3 Haiku. Analyzes your s
 
 ## Installation
 
-### Option 1: Pre-built Binary
+### Option 1: Quick Install (macOS/Linux)
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/sidedwards/auto-commit/main/scripts/install.sh | bash
+```
+
+This will:
+- Download the appropriate binary for your system
+- Add it to your PATH
+- Make it executable
+
+### Option 2: Manual Installation
 
 1. Download the latest release for your platform from [GitHub Releases](https://github.com/sidedwards/auto-commit/releases)
 2. Move to a location in your PATH:
@@ -37,7 +48,7 @@ sudo chmod +x /usr/local/bin/auto-commit
 move auto-commit-windows-x64.exe C:\Windows\System32\auto-commit.exe
 ```
 
-### Option 2: Install from Source
+### Option 3: Install from Source
 
 ````bash
 # Install Deno
@@ -52,12 +63,12 @@ deno task install
 ### Updating
 
 ```bash
+# If installed with quick install or manual binary
+curl -fsSL https://raw.githubusercontent.com/sidedwards/auto-commit/main/scripts/install.sh | bash
+
 # If installed from source
 cd auto-commit
 deno task update
-
-# If using pre-built binary
-# Download the latest release and follow installation steps above
 ```
 
 ## Usage

scripts/install.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+set -e
+
+main() {
+    BIN_DIR=${BIN_DIR-"$HOME/.bin"}
+    mkdir -p $BIN_DIR
+
+    case $SHELL in
+    */zsh)
+        PROFILE=$HOME/.zshrc
+        PREF_SHELL=zsh
+        ;;
+    */bash)
+        PROFILE=$HOME/.bashrc
+        PREF_SHELL=bash
+        ;;
+    */fish)
+        PROFILE=$HOME/.config/fish/config.fish
+        PREF_SHELL=fish
+        ;;
+    */ash)
+        PROFILE=$HOME/.profile
+        PREF_SHELL=ash
+        ;;
+    *)
+        echo "could not detect shell, manually add ${BIN_DIR} to your PATH."
+        exit 1
+    esac
+
+    if [[ ":$PATH:" != *":${BIN_DIR}:"* ]]; then
+        echo >> $PROFILE && echo "export PATH=\"\$PATH:$BIN_DIR\"" >> $PROFILE
+    fi
+
+    PLATFORM="$(uname -s)"
+    case $PLATFORM in
+    Linux)
+        SUFFIX="linux-x64"
+        ;;
+    Darwin)
+        ARCH="$(uname -m)"
+        if [ "${ARCH}" = "arm64" ]; then
+            SUFFIX="darwin-arm64"
+        else
+            SUFFIX="darwin-x64"
+        fi
+        ;;
+    *)
+        err "unsupported platform: $PLATFORM"
+        ;;
+    esac
+
+    BINARY_URL="https://github.com/sidedwards/auto-commit/releases/latest/download/auto-commit-${SUFFIX}"
+    if [ "$PLATFORM" = "MINGW"* ] || [ "$PLATFORM" = "MSYS"* ] || [ "$PLATFORM" = "CYGWIN"* ]; then
+        BINARY_URL="https://github.com/sidedwards/auto-commit/releases/latest/download/auto-commit-windows-x64.exe"
+    fi
+
+    echo "Downloading latest auto-commit binary..."
+    ensure curl -L "$BINARY_URL" -o "$BIN_DIR/auto-commit"
+    chmod +x "$BIN_DIR/auto-commit"
+
+    echo "auto-commit installed successfully!"
+    echo "Run 'auto-commit --help' to get started"
+}
+
+# Run a command that should never fail. If the command fails execution
+# will immediately terminate with an error showing the failing
+# command.
+ensure() {
+    if ! "$@"; then err "command failed: $*"; fi
+}
+
+err() {
+    echo "$*" >&2
+    exit 1
+}
+
+main "$@" || exit 1