Darcs.UI.External
sendEmail
generateEmail
sendEmailDoc
resendEmail
signString
verifyPS
execDocPipe
execPipeIgnoreError
pipeDoc
pipeDocSSH
maybeURLCmd
viewDoc
viewDocWith
haveSendmail
sendmailPath
diffProgram
darcsProgram
editText
editFile
catchall
setDarcsEncodings
getSystemEncoding
isUTF8Locale