ARROW-3815 [R]: refine record batch factory

[romainfrancois]

so that array() when given an arrow::Array is identity

library(arrow, warn.conflicts=FALSE)
array(array(1:10))
#> arrow::Array #> [#> 1,#> 2,#> 3,#> 4,#> 5,#> 6,#> 7,#> 8,#> 9,#> 10#> ]

so that we may supply already made arrow::Array in record_batch()

batch<- record_batch(x=1:10, y=arrow::array(1:10))
as_tibble(batch)
#> # A tibble: 10 x 2#> x y#> <int> <int>#> 1 1 1#> 2 2 2#> 3 3 3#> 4 4 4#> 5 5 5#> 6 6 6#> 7 7 7#> 8 8 8#> 9 9 9#> 10 10 10

^{Created on 2019-06-10 by the reprex package (v0.3.0.9000)}

[nealrichardson]

Looks like cpp linting failed (wonder if we can make a precommit hook to fix style issues for us).

This will conflict with #4491

Do any docs need to be updated to explain valid inputs for these functions?

[romainfrancois]

Do you have an example pre-commit script in mind ?

[codecov-io]

Codecov Report

Merging #4508 into master will decrease coverage by 0.05%.
The diff coverage is 84.61%.

@@ Coverage Diff @@## master #4508 +/- ##
==========================================
- Coverage 88.15% 88.1% -0.06% 
==========================================
Files 850 850 Lines 106319 105783 -536 Branches 1253 1253 ==========================================
- Hits 93730 93204 -526 + Misses 12344 12334 -10 
Partials 245 245

Impacted Files	Coverage Δ
r/src/arrowExports.cpp	72.7% <ø> (ø)	⬆️
r/src/array_from_vector.cpp	78.36% <83.33%> (+0.06%)	⬆️
r/src/recordbatch.cpp	82.69% <85.71%> (ø)	⬆️
r/src/arrow_types.h	88.88% <0%> (-7.12%)	⬇️
cpp/src/gandiva/decimal_ir.cc	72.78% <0%> (-3.82%)	⬇️
cpp/src/arrow/json/converter.cc	90.53% <0%> (-1.78%)	⬇️
cpp/src/arrow/json/chunked-builder.cc	79.91% <0%> (-1.68%)	⬇️
r/src/array__to_vector.cpp	77.95% <0%> (-0.71%)	⬇️
cpp/src/gandiva/precompiled/decimal_ops.cc	96.68% <0%> (-0.51%)	⬇️
cpp/src/gandiva/function_registry_arithmetic.cc	100% <0%> (ø)	⬆️
... and 11 more

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[nealrichardson]

Re: precommit hook, IDK exactly, I've just seen lint failures on Travis where the error message tells you a script to run to fix it, so why not just run that script in a precommit hook and prevent the Travis failure in the first place? If this is sufficiently annoying to you too, I can look into it.