Make a copy of config before overriding it

[jjromannet]

Does not work (current latest image)

# create test config
print "version: 2\nbackends:\n  localtmp:\n    type: local\n    path: /tmp/backup-backend\nlocations:\n  data:\n    from:\n    - /data/\n    to:\n    - localtmp" | tee test-config.yaml

# autorestic check 
docker run --rm -v $(pwd):/data cupcakearmy/autorestic autorestic -c /data/test-config.yaml check -v

# list all files matching pattern
ls -l test-config.*

output (no file with .old extension) :

janr@Jans-MacBook-Pro autorestic % ls -l test-config.*
-rw-r--r--  1 janr  staff  232 Feb  9 20:47 test-config.yaml

Working:

# build from branch sources
docker build -t local-autorestic .

# create test config
print "version: 2\nbackends:\n  localtmp:\n    type: local\n    path: /tmp/backup-backend\nlocations:\n  data:\n    from:\n    - /data/\n    to:\n    - localtmp" | tee test-config.yaml

# autorestic check 
docker run --rm -v $(pwd):/data local-autorestic autorestic -c /data/test-config.yaml check -v

# list all files matching pattern
ls -l test-config.*

output:

Everything is fine.
janr@Jans-MacBook-Pro autorestic % ls -l test-config.*
-rw-r--r--  1 janr  staff  239 Feb  9 20:52 test-config.yaml
-rw-r--r--  1 janr  staff  144 Feb  9 20:52 test-config.yaml.old
janr@Jans-MacBook-Pro autorestic % 

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