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Shebang #345

Merged
merged 1 commit into from Feb 18, 2018
Merged

Shebang #345

merged 1 commit into from Feb 18, 2018

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@lorenzwalthert
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@lorenzwalthert lorenzwalthert commented Feb 5, 2018

Aims to close #344. @jjramsey do you think the following regex is appropriate to identify hash-bang statements?

"^#![^\\s].*\\s[^\\s]+\\b.*$"

I first thought about including Rscript too but I think commands other than Rscript can be used in hash-bangs that can execute R, right? So it would be too specific. Alternatively, I thought about only looking at the first line of a file, but that seems to complicate things. The prosed regex will result in a few false positives though (see example #!NEED TO REMOVE THIS, which will be treated as hash-bang statement with the proposed regex).

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@codecov-io codecov-io commented Feb 5, 2018

Codecov Report

Merging #345 into master will increase coverage by 0.04%.
The diff coverage is 100%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master     #345      +/-   ##
==========================================
+ Coverage    91.3%   91.35%   +0.04%     
==========================================
  Files          30       30              
  Lines        1391     1399       +8     
==========================================
+ Hits         1270     1278       +8     
  Misses        121      121
Impacted Files Coverage Δ
R/rules-spacing.R 96.07% <100%> (ø) ⬆️
R/expr-is.R 96.29% <100%> (+1.55%) ⬆️

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@lorenzwalthert
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@lorenzwalthert lorenzwalthert commented Feb 18, 2018

Ok, I think we can do it differently (better and simpler). Since a shebang statement will always be on the first line and hence a top-level expression, it will have pos_id 1 and we can simplify the regex to

^#!

@lorenzwalthert lorenzwalthert changed the title Hash bang Shebang Feb 18, 2018
@lorenzwalthert lorenzwalthert merged commit 49621d9 into r-lib:master Feb 18, 2018
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@lorenzwalthert lorenzwalthert deleted the hash-bang branch Feb 18, 2018
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2 participants