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github(login): Add a way to read ~/.netrc.gpg encrypted files #624

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github(login): Add a way to read ~/.netrc.gpg encrypted files #624

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30 changes: 28 additions & 2 deletions lib/travis/tools/github.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
require 'yaml'
require 'json'
require 'gh'
require 'open3'

module Travis
module Tools
Expand Down Expand Up @@ -171,7 +172,7 @@ def keychain_login
end

def netrc
file(netrc_path, []) do |contents|
gpg_file_or_file(netrc_path, []) do |contents|
contents.scan(/^\s*(\S+)\s+(\S+)\s*$/).inject([]) do |mapping, (key, value)|
mapping << {} if key == "machine"
mapping.last[key] = value if mapping.last
Expand Down Expand Up @@ -282,12 +283,37 @@ def security(type, key, arg, name)
raise e if explode
end

def gpg_file_or_file(path, default = nil)
gpg_path = File.expand_path("#{path}.gpg")

if File.file?(gpg_path)
path &&= gpg_path
else
path &&= File.expand_path(path)
end

file(path, default)
end

def file(path, default = nil)
path &&= File.expand_path(path)
@file ||= {}
@file[path] ||= if path and File.readable?(path)
debug "reading #{path}"
yield File.read(path)
if path.end_with?(".gpg")
stdout_str, stderr_str, status = Open3.capture3("gpg", "-d", path)
if status.success?
yield stdout_str
else
debug "unable to decrypt #{path} file because of:"
debug stderr_str
unencrypted_path = path.sub(/#{File.extname(path)}$/, '')
debug "falling back to reading #{unencrypted_path}"
yield File.read(unencrypted_path)
end
else
yield File.read(path)
end
end
@file[path] || default
rescue => e
Expand Down