Adding support for multiple yaml files in command line arguments

[bubbleattic]

Adding support for multiple yaml files in command line arguments.

Tested all result in same output:

Recursive merge two json files using jq (1.5)

jq -s '.[0] * .[1]' a.json b.json

Recursive merge two json files using yq

yq -s '.[0] * .[1]' a.json b.json

Recursive merge two yaml files using yq

yq -s '.[0] * .[1]' a.yml b.yml

NOTE:
The line "jq.stdin.write('\n')" was added in to work around bug with current version of jq where the following commands were generating different results.
echo -n '{"b": {"c": 3}, "a": 2}{"b": {"e": 4}, "d": 3}' | jq -s '.'
echo '{"b": {"c": 3}, "a": 2}{"b": {"e": 4}, "d": 3}' | jq -s '.'

Since adding newline after json documents makes sense any way, workaround not that big of deal.

[codecov-io]

Codecov Report

Merging #7 into master will increase coverage by 0.7%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master       #7     +/-   ##
=========================================
+ Coverage   83.58%   84.28%   +0.7%     
=========================================
  Files           2        2             
  Lines          67       70      +3     
=========================================
+ Hits           56       59      +3     
  Misses         11       11

Impacted Files	Coverage Δ
yq/__init__.py	84.05% <100%> (+0.72%)	⬆️

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[kislyuk]

Thanks! This needs a test, but I can add one.

[kislyuk]

Released in v2.3.1.

Please note, I have removed your printing of an extra newline. I don't consider it appropriate to put workarounds for jq bugs in this package. If you wish to put it back in, please provide a more thorough rationale/use case, and also a link to the corresponding issue filed with https://github.com/stedolan/jq.

[bubbleattic]

I created bug to jq: jqlang/jq#1486

FYI if '-y' specified yq is already adding in newlines.
input_payload = "\n".join(json.dumps(doc, cls=JSONDateTimeEncoder) for doc in input_docs)

maybe just use exact same code if -y not specified that way its not workaround its consistent.

input_payload = "\n".join(json.dumps(doc, cls=JSONDateTimeEncoder) for doc in input_docs)
jq_out, jq_err = jq.communicate(input_payload)
sys.stdout.write(jq_out)

None of examples i listed above will work due to jq bug. (Examples will work though if use -y flag since in that case newlines added in).