Scp files to vagrant

Posted on by homanhduc

So our work environment makes use of Vagrant to emulate real environment and the setup is ….annoying LONG but luckily you only need to set it up one…until the box is acting up……in which case you have to destroy and set it up again.

Fine. But here’s where it gets very annoying because you have to regenerate public key for the box again. It dawns on me that since the box lives in my machine, why can’t I just reuse the public key that I already generate to pull the repository in the first place.

I move all the keys to the mount folder( sync folder ) and copy it to ~/.ssh/ and found that it works. Hooray. But this is too much clicking. Can I automate it?  This answer posits that you could scp to the box using the IdentityFile, which is what I decided to do.

The gist of the command is to substitute the variable into scp command:


scp -P ${port} -i ${identityFile} file ${User}@${HostName}:${destination}/

vagrant ssh-config actually spits out the useful Info. So we can parse that


#!/bin/sh
dest="" #parse dest
ssh_config="$(vagrant ssh-config)"

interest_keys=("HostName" "User" "Port" "IdentityFile")
interest_vals=()
current_key_index=0
current_key="${interest_keys[${current_key_index}]}"
grab_value=false

for line in $ssh_config
do
if [ "${grab_value}" = true ];then
   interest_vals+=("${line}")
   current_key_index="${current_key_index} + 1"
   current_key="${interest_keys[${current_key_index}]}"
   grab_value=false
elif [ "${line}" = "${current_key}" ]; then
   grab_value=true
fi
done

cmd="scp -P ${interest_vals[2]} -i ${interest_vals[3]} ${@} ${interest_vals[1]}@${interest_vals[0]}:${dest}/"
eval $cmd

And then copy all the public key as well as ssh config to vagrant with this command


#chmod +x script before run

./script ~/.ssh/* --dest=~/.ssh/

Here is the full code along with parsing destination and trying to infer the default destination ( wild card exansion . Not working yet!!!)

 


#!/bin/sh
ssh_config="$(vagrant ssh-config)"
default_dest=""
prev_dest=""
default_dest_inferrable=true
dest=""
file_names=()
interest_keys=("HostName" "User" "Port" "IdentityFile")
interest_vals=()
current_key_index=0
current_key="${interest_keys[${current_key_index}]}"
grab_value=false

#try to infer the default dest if parameters having the same dirname
for file_name in "$@"
do
   case ${file_name} in
      --dest=*)
         dest="${file_name#*=}"
         shift
         ;;
      *)
         dir_name="$(dirname ${file_name})"
         if [[ "$prev_dest" = "" ]];then
            prev_dest="${dir_name}"
         elif [[ "$prev_dest" != "$dir_name" ]]; then
            default_dest_inferrable=false
         fi
         file_names+="$file_name "
         ;;
   esac
done

if [[ "$dest" = "" ]] && [[ "$default_dest_inferrable" = false ]]; then
   echo "Cannot parse destination or Cannot infer the destination"
exit
fi

if [[ "$dest" = "" ]]; then
   dest="${prev_dest}"
fi

for line in $ssh_config
do
if [ "${grab_value}" = true ];then
   interest_vals+=("${line}")
   current_key_index="${current_key_index} + 1"
   current_key="${interest_keys[${current_key_index}]}"
   grab_value=false
elif [ "${line}" = "${current_key}" ]; then
   grab_value=true
fi
done

cmd="scp -P ${interest_vals[2]} -i ${interest_vals[3]} ${@} ${interest_vals[1]}@${interest_vals[0]}:${dest}/"
eval $cmd

Beware also. As soon as the known_hosts were copied over, go in there to delete 127.0.0.1 so that Vagrant won’t ask for password the next time. It stucks connects to itself I think…..

Leave a comment