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Fix(which): match only executable files (#657) #874

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merged 4 commits into from Jul 18, 2018

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termosa
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@termosa termosa commented Jul 12, 2018

Fixes #657.

@termosa termosa force-pushed the b/657/which-finds-executables branch from 2369ccd to 644e632 Compare July 12, 2018 19:51
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codecov-io commented Jul 12, 2018

Codecov Report

Merging #874 into master will increase coverage by <.01%.
The diff coverage is 100%.

Impacted file tree graph

@@            Coverage Diff            @@
##           master    #874      +/-   ##
=========================================
+ Coverage    95.8%   95.8%   +<.01%     
=========================================
  Files          34      34              
  Lines        1263    1264       +1     
=========================================
+ Hits         1210    1211       +1     
  Misses         53      53
Impacted Files Coverage Δ
src/which.js 95% <100%> (+0.12%) ⬆️

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Thanks for the great (and quick) PR!

test/which.js Outdated

test('None executable files does not appear in the result list', t => {
const commandName = 'node'; // Should be an existing command
const pathEnv = process.env.path || process.env.Path || process.env.PATH;
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This doesn't look right. This should be process.env.PATH.

Only all-caps $PATH works on unix. On Windows, process.env.path is totally the same as process.env.PATH (and all variations of capitalization of "path").

test/which.js Outdated
const matchingFile = path.resolve(extraPath, commandName);

// make sure that file is exists (will throw error otherwise)
fs.statSync(matchingFile);
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nit: can you make this t.truthy(fs.existsSync())? We generally prefer assertion failures over exceptions.

@@ -13,13 +13,25 @@ common.register('which', _which, {
// set on Windows.
var XP_DEFAULT_PATHEXT = '.com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh';

// For earlier versions of NodeJS that doesn't have a list of constants (< v6)
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Could you add a TODO to use the node-provided constant on v6+? We'll eventually drop v4/5.

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Also, I'm trusting that (1) this value is respected on v4, even though the constant does not exist, and (2) the value is treated the same as F_OK on Windows, just as X_OK is documented:

Flag indicating that the file can be executed by the calling process. This has no effect on Windows (will behave like fs.constants.F_OK).

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True, on Windows X_OK and F_OK are equivalent. But on Windows platform file extensions are used to determine if file is executable or not.
I will not do this check for Windows platform.

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I will not do this check for Windows platform.

Sounds good

test/which.js Outdated
t.truthy(resultForWhichA);
t.truthy(resultForWhichA.length);
t.not(resultForWhich.toString(), matchingFile);
t.not(resultForWhichA[0], matchingFile);
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Could you rewrite this as:

t.falsy(resultForWhichA.includes(matchingFile));

Also, I think it makes sense to skip this test on Windows, or to assert the array does contain the value on Windows. WDYT?

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includes is not handled by Ava and it is not supported in node@5. I would also save [0] index to make sure that order is proper.

@nfischer nfischer self-assigned this Jul 12, 2018
@termosa termosa force-pushed the b/657/which-finds-executables branch from 51fd66a to 9157b53 Compare July 14, 2018 11:23
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LGTM % comment.

Also, can you check the coverage on your local machine? codecov says isExecutable() is not covered. If this is a codecov bug, can you add /* istanbul ignore next */ and add a comment mentioning codecov is to blame?

test/which.js Outdated
t.truthy(resultForWhichA.length);
t.not(resultForWhich.toString(), matchingFile);
// TODO(node-support): this can be used starting from node@6: t.falsy(resultForWhichA.includes(matchingFile))
t.not(resultForWhichA[0], matchingFile);
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Sorry, I thought .includes() was added by babel. Could you instead write this as:

t.is(resultForWhichA.indexOf(matchingFile), -1);

That way we have the correct semantics for the assertion.

@termosa termosa force-pushed the b/657/which-finds-executables branch from 25232fc to ce70542 Compare July 15, 2018 11:14
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termosa commented Jul 18, 2018

@nfischer done

t.not(resultForWhich.toString(), matchingFile);
t.is(resultForWhichA.indexOf(matchingFile), -1);

process.env.PATH = pathEnv;
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Oh sorry, I must have missed this. This should go in an test.afterEach.always block. Example:

shelljs/test/exec.js

Lines 14 to 17 in 6d66a1a

test.afterEach.always(() => {
process.chdir(CWD);
shell.config.execPath = ORIG_EXEC_PATH;
});

This shouldn't block this change. I added a comment to #834 to track this.

@nfischer nfischer merged commit 8dae55f into shelljs:master Jul 18, 2018
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Thanks @termosa!

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3 participants