python - How to run bash script with commands in tests in vagrant? -

running commands or script lines simple tests, -e, in vagrant using ssh subcommand works fine (e.g.

vagrant ssh -c 'if ! [ -e file.deb ] ; wget http://a.b/file.deb; fi' 

as string comparison , command execution bash quoting gets involved, complexity rises sky. tried

• escaping strings, doesn't seem work in general (complexity of escaping of escaping of escaping ... in bash inacceptable)

• writing in script file cat <<eof > file [code]eof idiom, e.g.

  vagrant ssh -c 'cat <<eof > fetch.sh \ #!/bin/bash \ if [ "$(md5sum file.deb | cut -d \" \" -f 1)" != "d757d51819f8f945ae7715b532ab8d2e" ] ; wget http://a/b/file.deb; fi \ eof' vagrant ssh -c 'bash ./fetch.sh' 

  causes ./fetch.sh: line 1: syntax error near unexpected token `if'

• the failure of cat eof idiom implies failure of sort of script created in vagrant (python, groovy, etc. suffer same incapacity of bash provide usable string quoting/be usable @ all)

is there way execute script code complex statements in tests inside vagrant box? need transfer script via localhost interface (using ftp or similar)?

with knowledge of how use ssh run shell script on remote machine? it's possible connect vagrant using

ssh -p [port] -i [keyfile] vagrant@localhost 'bash -s' < script.sh 

(with [port] , [keyfile] retrieved vagrant ssh-config) , script code put in script.sh.

the port can change if multiple vagrant instances running (each starting own ssh server), might need parse vagrant ssh-config.