Introduce git-conceal wrapper script

That auto-downloads the binary from GitHub Release if it doesn't exist locally

Author: AliSoftware

bin/git-conceal

@@ -0,0 +1,144 @@
+#!/bin/bash
+
+# Description:
+#   A wrapper script to run `git-conceal` (https://github.com/Automattic/git-conceal)
+#
+#   The wrapper automatically downloads the `git-conceal` binary from GitHub releases
+#   for the current platform and architecture if it's not already available on the system
+#   before executing it.
+#
+# Notes:
+#   - On macOS, the script removes the quarantine attribute from downloaded binaries.
+#   - The script supports macOS (Intel and ARM), Linux (x86_64), and Windows (x86_64).
+#
+
+set -euo pipefail
+
+# Determine the executable name based on platform
+OS=$(uname -s)
+ARCH=$(uname -m)
+
+if [[ "$OS" == "MINGW"* ]] || [[ "$OS" == "MSYS"* ]] || [[ "$OS" == "CYGWIN"* ]]; then
+    EXECUTABLE_NAME="git-conceal.exe"
+    IS_WINDOWS=true
+else
+    EXECUTABLE_NAME="git-conceal"
+    IS_WINDOWS=false
+fi
+
+# Checks if git-conceal binary exists in PATH or current directory
+find_git_conceal_binary() {
+    # Check in PATH first
+    if command -v "$EXECUTABLE_NAME" >/dev/null 2>&1; then
+        command -v "$EXECUTABLE_NAME"
+        return 0
+    fi
+
+    # Check in current directory otherwise
+    if [[ -f "./$EXECUTABLE_NAME" ]]; then
+        echo "./$EXECUTABLE_NAME"
+        return 0
+    fi
+
+    return 1
+}
+
+# Try to find existing git-conceal binary
+if EXECUTABLE=$(find_git_conceal_binary); then
+    exec "$EXECUTABLE" "$@"
+fi
+
+# If not found, download it
+echo "git-conceal not found locally. Downloading from GitHub releases..."
+
+# Map platform and architecture to Rust target triple format
+case "$OS" in
+    Darwin)
+        case "$ARCH" in
+            arm64)
+                TARGET_TRIPLE="aarch64-apple-darwin"
+                ;;
+            x86_64)
+                TARGET_TRIPLE="x86_64-apple-darwin"
+                ;;
+            *)
+                echo "Unsupported architecture on macOS: $ARCH"
+                exit 2
+                ;;
+        esac
+        ;;
+    Linux)
+        case "$ARCH" in
+            x86_64)
+                TARGET_TRIPLE="x86_64-unknown-linux-gnu"
+                ;;
+            aarch64|arm64)
+                TARGET_TRIPLE="aarch64-unknown-linux-gnu"
+                ;;
+            *)
+                echo "Unsupported architecture on Linux: $ARCH"
+                exit 2
+                ;;
+        esac
+        ;;
+    MINGW*|MSYS*|CYGWIN*)
+        case "$ARCH" in
+            x86_64)
+                TARGET_TRIPLE="x86_64-pc-windows-gnu"
+                ;;
+            *)
+                echo "Unsupported architecture on Windows: $ARCH"
+                exit 2
+                ;;
+        esac
+        ;;
+    *)
+        echo "Unsupported operating system: $OS"
+        exit 2
+        ;;
+esac
+
+# Get the latest release tag from GitHub API
+LATEST_RELEASE_URL="https://api.github.com/repos/Automattic/git-conceal/releases/latest"
+RELEASE_INFO=$(curl -s -L "$LATEST_RELEASE_URL")
+if [[ -z "$RELEASE_INFO" ]]; then
+    echo "Failed to fetch release information from GitHub"
+    exit 1
+fi
+
+# Extract the version (tag_name) from the release info
+VERSION=$(echo "$RELEASE_INFO" | jq -r '.tag_name // empty')
+if [[ -z "$VERSION" ]] || [[ "$VERSION" == "null" ]]; then
+    echo "Failed to extract version from release information"
+    exit 1
+fi
+
+# Construct the asset name
+if [[ "$IS_WINDOWS" == "true" ]]; then
+    ASSET_NAME="git-conceal-${TARGET_TRIPLE}-${VERSION}.exe"
+else
+    ASSET_NAME="git-conceal-${TARGET_TRIPLE}-${VERSION}"
+fi
+
+# Download the binary
+DOWNLOAD_URL="https://github.com/Automattic/git-conceal/releases/download/${VERSION}/${ASSET_NAME}"
+echo "Downloading $ASSET_NAME from GitHub releases..."
+if ! curl -L -f -o "$EXECUTABLE_NAME" "$DOWNLOAD_URL"; then
+    echo "Failed to download $ASSET_NAME from $DOWNLOAD_URL"
+    exit 1
+fi
+
+# Make it executable on Unix platforms
+if [[ "$IS_WINDOWS" == "false" ]]; then
+    chmod +x "$EXECUTABLE_NAME"
+
+    # Remove quarantine attribute on macOS
+    if [[ "$OS" == "Darwin" ]]; then
+        if xattr -d com.apple.quarantine "$EXECUTABLE_NAME" 2>/dev/null || true; then
+            echo "Removed quarantine attribute from $EXECUTABLE_NAME"
+        fi
+    fi
+fi
+
+# Execute the binary
+exec "./$EXECUTABLE_NAME" "$@"