add examples for __remote_{copy,exec} scripts

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>

other/examples/remote/README

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+Some examples of using alternative __remote_copy and __remote_exec prefixes.
+This allows you to change how cdist interacts with the target host (or directory, or whatever :-)

other/examples/remote/chroot/copy

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+#!/bin/sh
+#
+# __remote_copy script to run cdist against a local chroot instead of via ssh 
+# to a remote target host.
+#
+# Usage:
+#  __remote_copy="/path/to/this/script /path/to/your/chroot" cdist config target-id
+#
+
+log() {
+   #echo "$@" | logger -t "cdist-chroot-copy"
+   :
+}
+
+chroot="$1"; shift
+target_host="$__target_host"
+
+# replace target_host with chroot location
+code="$(echo "$@" | sed "s|$target_host:|$chroot|g")"
+
+log "$@"
+log "target_host: $target_host"
+log "$code"
+
+# copy files into chroot
+cp $code
+
+log "-----"

other/examples/remote/chroot/exec

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+#!/bin/sh
+#
+# __remote_exec script to run cdist against a local chroot instead of via ssh 
+# on a remote target host.
+#
+# Usage:
+#  __remote_exec="/path/to/this/script /path/to/your/chroot" cdist config target-id
+#
+
+log() {
+   #echo "$@" | logger -t "cdist-chroot-exec"
+   :
+}
+
+chroot="$1"; shift
+target_host="$1"; shift
+script=$(mktemp "${chroot}/tmp/chroot-${0##*/}.XXXXXXXXXX")
+trap cleanup INT TERM EXIT
+cleanup() {
+   [ $__cdist_debug ] || rm "$script"
+}
+
+log "$script"
+log "$@"
+echo "#!/bin/sh -l" > "$script"
+echo "$@" >> "$script"
+chmod +x "$script"
+
+relative_script="${script#$chroot}"
+log "relative_script: $relative_script"
+
+# run in chroot
+chroot "$chroot" "$relative_script"
+
+log "-----"

other/examples/remote/ssh/copy

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+#!/bin/sh
+#
+# same as cdist default
+#
+# Usage:
+#  __remote_copy="/path/to/this/script" cdist config target_host
+#
+
+#echo "$@" | logger -t "cdist-ssh-copy"
+scp -o User=root -q $@

other/examples/remote/ssh/exec

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+#!/bin/sh
+#
+# same as cdist default
+#
+# Usage:
+#  __remote_exec="/path/to/this/script" cdist config target_host
+#
+
+#echo "$@" | logger -t "cdist-ssh-exec"
+ssh -o User=root -q $@