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feat: permissive git diff parameter #185

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merged 9 commits into from
Sep 10, 2021

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nvuillam
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@nvuillam nvuillam commented Aug 19, 2021

Manage a new argument --permissivediff to add the following parameters to git diff call

[
    '--ignore-all-space',
    '--ignore-blank-lines',
    '--ignore-cr-at-eol',
    '--word-diff-regex',
]

It allows to avoid detecting as a difference the indentation/spaces stuff

Fixes #184

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codecov bot commented Aug 20, 2021

Codecov Report

Merging #185 (db0dc0c) into master (6b2adb4) will not change coverage.
The diff coverage is 100.00%.

Impacted file tree graph

@@            Coverage Diff            @@
##            master      #185   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines          459       462    +3     
=========================================
+ Hits           459       462    +3     
Impacted Files Coverage Δ
src/utils/fileGitDiff.js 100.00% <100.00%> (ø)
src/utils/gitConstants.js 100.00% <100.00%> (ø)
src/utils/repoGitDiff.js 100.00% <100.00%> (ø)

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@scolladon scolladon changed the title Allow to use permissive git diff to ignore diffs related to indentation feat: permissive git diff parameter Aug 20, 2021
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Hi @nvuillam !

I copy paste my comment from the related issue

I have questions:

  • Why this should not be the standard behaviour? => What will be the added value to that and why both use cases should exists?
  • why using --word-diff-regex parameter? With which value?

Suggestion: the parameter name must follow the cli parameter apache convention. I suggest the following --permissive-diff -P if we keep this wording

Please add me to your fork so I can contribute and help you solve CI/CD issues you may encounter

Manage a new argument --permissivediff to add the following parameters to git diff call

[
    '--ignore-all-space',
    '--ignore-blank-lines',
    '--ignore-cr-at-eol',
    '--word-diff-regex',
]
It allows to avoid detecting as a difference the indentation/spaces stuff
@nvuillam
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nvuillam commented Sep 2, 2021

@scolladon I see you made the code more clean, nice ! :)

When do you think this could be released ? It would greatly help sfdx-hardis ^^

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scolladon commented Sep 3, 2021

Hi @nvuillam !

When do you think this could be released ? It would greatly help sfdx-hardis ^^

We are going to discuss about it today with @mehdisfdc and see how we can improve (if we can) and when to ship it
We'll keep you posted!

@nvuillam
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nvuillam commented Sep 3, 2021

That's great, thanks for the feedback :)

README.md Outdated
trace|debug|info|warn|error|fatal|TRACE|DEBUG|INFO|WARN|ERROR|FATAL]

OPTIONS
-D, --ignore-destructive=ignore-destructive ignore file to use

-P, --permissive-diff ignore git diff white char (space,
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@scolladon As discussed together, would you prefer to name the new command -W, --ignore-whitespace instead of -P, --permissive-diff? Both are fine with me.
@nvuillam Any opinion on this alternative name?

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@mehdisfdc --ignore-whitespace-diff maybe ? :)
Anyway, while the capability is here, I don't matter the argument name :)

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I like -W, --ignore-whitespace 👍

'--ignore-all-space',
'--ignore-blank-lines',
'--ignore-cr-at-eol',
'--word-diff-regex',
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@nvuillam According to the git documentation, the --word-diff-regex parameter expects a <regex> value.
Otherwise it may apply a regex that is set locally in your gitattributes or git-config (extract from doc: "The regex can also be set via a diff driver or configuration option, see gitattributes[5] or git-config[1]. Giving it explicitly overrides any diff driver or configuration setting.").

To make sure the behaviour of this command is consistent for all SGD users, what do you think about specifying explicitly the regex to use? In other words, I suggesting to modify line 10 to specify explicitly the <regex> in --word-diff-regex=<regex> (I guess you could look into you gitattributes and git-config to retrieve the value that you used during your tests).

@scolladon To go further, in addition to specifying explicitly the default regex to apply, we could even offer the ability for the users to override it with their own regex (but that would a "nice-to-have" feature, while ensure a consistent behaviour in the command in more important IMHO).

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@mehdisfdc I love the idea to let the user override the default regex, I will implement it with the new parameter name (once everyone is ok) and with the default regex value

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More flexibility for the user, I fully agree, great suggestion :)

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I bounce on @mehdisfdc's message, @nvuillam could you give us the git config taken by --word-diff-regex?

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I'm sorry, I just used the parameter and I think I viewed a difference compared to without, but i've not sent any value to this parameter

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Could you retry on your side to make sure it does something ?
And if it does something on your side, as you don't use any regex with it, could you send us your gitattributes and git config please ?

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I don't have any .gitattributes defined

About git config, except user.name & user.email, I use

  • core.longpaths=true
  • core.quotepath=false

I'll try to make new tests, but unfortunately my work week is already busy, it may wait until next week :/

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But why not publishing as it is now, and send --word-diff-regex to git if --word-diff-regex is sent to sfdx-git-delta, and append --word-diff-regex value only if it is sent ? :)

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I prefer not to do that because if no parameter are given to --word-diff-regex then it uses the local configuration in .gitattributes and .git/config, which can be anything and could lead to unexpected behaviour

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So, I poced around and play a little bit with it.
It is also true for me that --word-diff-regex is required to have the right behavior.
I dig a little bit more in the documentation of this parameter in git and I found that there are default regex used (which are appened to the override foundable in .gitattributes and .git/config)

I wonder if we will have issues about this and how it will be to debug 😅 but I don't think it will be used by most of the users.
With that knowledge, it looks good to me 😄 for the version without the regex passed in arguments

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Code Climate has analyzed commit db0dc0c and detected 0 issues on this pull request.

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@scolladon scolladon merged commit 6d57783 into scolladon:master Sep 10, 2021
@scolladon scolladon deleted the feature/permissivediff branch September 10, 2021 07:47
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[permissivediff] Allow to use permissive git diff to ignore diffs related to indentation
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