Script to update Positron on macOS

update-positron.sh

#!/bin/bash

# Ensure jq is installed
if ! command -v jq &> /dev/null; then
    echo "jq is required but not installed. Please install jq (e.g., 'brew install jq') and retry."
    exit 1
fi

# Set API URL for GitHub releases
API_URL="https://api.github.com/repos/posit-dev/positron/releases"

# Fetch latest release tag
LATEST_TAG=$(curl -s $API_URL | jq -r '.[0].tag_name')

# Validate response
if [[ -z "$LATEST_TAG" || "$LATEST_TAG" == "null" ]]; then
    echo "Failed to determine the latest release tag."
    exit 1
fi

# Construct the .dmg download URL
DMG_URL="https://cdn.posit.co/positron/prereleases/mac/universal/Positron-${LATEST_TAG}.dmg"

# Download the .dmg file
DMG_FILE="Positron-${LATEST_TAG}.dmg"
echo "Downloading: $DMG_URL"
curl -L -o "$DMG_FILE" "$DMG_URL"

# Validate download
if [[ ! -f "$DMG_FILE" ]]; then
    echo "Download failed."
    exit 1
fi

# Mount the DMG
MOUNT_POINT="/Volumes/PositronInstaller"
hdiutil attach "$DMG_FILE" -mountpoint "$MOUNT_POINT" -nobrowse

# Find the application and copy to Applications folder
APP_NAME="Positron.app"
cp -R "$MOUNT_POINT/$APP_NAME" "/Applications/"

# Unmount and clean up
hdiutil detach "$MOUNT_POINT"
rm "$DMG_FILE"

echo "Positron installed successfully."