feat: Use system curl and sha256sum commands to digest binaries

scripts/release-checksums.rb

@@ -1,19 +1,23 @@
 #!/usr/bin/env ruby
 
+# curl and sha256sum are required to run this.
+
 tag = ARGV[0]
-puts "generate release checksums for #{tag}"
+puts "Generate release checksums for #{tag}, this could take a while..."
 
 windows_exe = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-win-installer.exe"
 macos_zip = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-mac.zip"
 macos_dmg = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-mac.dmg"
 linux_appimage = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-linux-x86_64.AppImage"
 
-# TODO: Download binaries and calculate checksums
+def get_sha256_checksum(url)
+  %x(curl -L -s #{url} | sha256sum).split(" ").first
+end
 
-windows_exe_sha256 = "{WINDOWS_EXE_SHA256}"
-macos_zip_sha256 =  "{MACOS_ZIP_SHA256}"
-macos_dmg_sha256 = "{MACOS_DMG_SHA256}"
-linux_appimage_sha256 = "{LINUX_APPIMAGE_SHA256}"
+windows_exe_sha256 = get_sha256_checksum(windows_exe)
+macos_zip_sha256 = get_sha256_checksum(macos_zip)
+macos_dmg_sha256 = get_sha256_checksum(macos_dmg)
+linux_appimage_sha256 = get_sha256_checksum(linux_appimage)
 
 checksums = %(
 ### Downloads