Add a vdn-rsync command

README.md

@@ -24,3 +24,29 @@ Copy the `vdn-completion.bash` file in `/usr/local/share/bash-completion/complet
 cp completion/vdn-completion.bash /usr/local/share/bash-completion/completions/vdn
 grep 'complete -F \w* [a-z-]*' -- completion/vdn-completion.bash | awk '{ print "/usr/local/share/bash-completion/completions/"$NF }' | xargs -I {} ln -s /usr/local/share/bash-completion/completions/vdn {}
 ```
+
+## `vdn-rsync`
+
+Copy files between the host and the guest system using *rsync*.
+
+### With a script
+
+Use the `bin/vdn-rsync` script to have a nice interface with *rsync*.
+
+```bash
+vdn-rsync -av src root@bigboss:
+```
+
+Add it to your path:
+
+```bash
+PATH="$PATH:~/path/to/vdn-tools/bin/"
+```
+
+### Without a script
+
+Specify the `vdn-ssh` command with `rsync`.
+
+```bash
+rsync -av src -e vdn-ssh root@bigboss:
+```

bin/vdn-rsync

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -eu
+
+VDN_PATH=$(readlink -f $(dirname $(command -v vdn))/..)
+. $VDN_PATH/bin/functions.sh
+GUEST_OWNER=$USER
+
+rewrite_connection() {
+  if [[ $1 != *:* ]]; then
+    connection="$1"
+  else
+    connection=${1%:*}
+    local path=${1#*:}
+    local user=${connection%@*}
+    guest=${connection#*@}
+    connection="${user}@localhost:${path}"
+  fi
+}
+
+determine_redir_port() {
+  local redirs="$TMPDIR/vdn-$guest-${GUEST_OWNER}-redirs"
+  [[ ! -e $redirs ]] && error "Impossible de joindre $guest"
+  sshRedirPort=$(awk -F ':' '$1 == "tcp" && $3 == "22" {print $2}' "$redirs")
+  [[ -n $sshRedirPort ]] || error "Aucune redirection vers le port 22 du système $guest"
+}
+
+declare -a options=()
+declare -a srcs=()
+dest=''
+guest=''
+while [[ $# -ne 0 ]]; do
+  if [[ $1 == -* ]]; then
+    options+=("$1")
+  elif [[ $# -ne 1 ]]; then
+    rewrite_connection "$1"
+    options+=("$connection")
+  else
+    rewrite_connection "$1"
+    dest="$connection"
+  fi
+  shift
+done
+
+if [[ $guest ]]; then
+  determine_redir_port
+else
+  error 'Utiliser rsync directement'
+fi
+rsync "${options[@]}" -e "ssh -g -p $sshRedirPort" "${srcs[@]}" "$dest"