From b08b53aabd895afb16954abef36c4da7e4e24258 Mon Sep 17 00:00:00 2001
From: Ian Kelling <ian@iankelling.org>
Date: Thu, 5 May 2016 21:12:14 -0700
Subject: [PATCH] better option for new system

---
 myunison | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/myunison b/myunison
index fa79b4a..68ec7d4 100755
--- a/myunison
+++ b/myunison
@@ -1,15 +1,16 @@
-#!/bin/bash -l
+#!/bin/bash -lx
 
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
 gen_args=()
 do_snapshot=true
-while [[ $1 == -* ]]; do
+while [[ $1 ]]; do
     case $1 in
         -n) do_snapshot=false; shift ;;
         --) shift; break ;;
         -*) gen_args+=($1) ; shift ;;
+        *) host=$1; shift ;;
     esac
 done
 
@@ -24,12 +25,11 @@ done
 # todo: I should test pushing my unison version instead
 # of pulling it.
 /p/c/subdir_files/.unison/gen ${gen_args[@]}
-if [[ ! $1 ]]; then
+if [[ ! $host ]]; then
     echo "$0: error: expected argument for hostname"
     exit 1
 fi
 
-host=$1
 
 # todo: this doesn't deal with if the host is running arch too
 
@@ -37,14 +37,22 @@ host=$1
 # on an uncustomized jessie install.
 scp /usr/bin/unison root@$host:/usr/local/bin
 
+echo "$0: egen args ${gen_args[@]}"
 if $do_snapshot; then
     unison-snapshot
-    ssh root@$host unison-snapshot
+    if ! ssh root@$host unison-snapshot; then
+        if [[ ! ${gen_args[@]} ]]; then
+            # gen_args are all about syncing with new systems where
+            # we could expect the remote snapshot to not be available yet.
+            echo "$0: error: failed remote unison-snapshot"
+            exit 1
+        fi
+    fi
 fi
 
 f=unison-gtk
 type -t $f &>/dev/null || f=unison-gtk2 # for arch
-if s $f "$@"; then
+if s $f "$host"; then
     if [[ $host == frodo ]]; then
         # only send data to the machine i do full backups to
         p=/p/c/machine_specific/$HOSTNAME/.unison/
-- 
2.30.2