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{{ $ in dex : = 0 }}
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<div class="timeline-item commits-list">
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{{ range .comment .Commits }}
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{{ $ tag : = printf "%s-%d" $ .comment .HashTag $ in dex }}
Use a general Eval function for expressions in templates. (#23927)
One of the proposals in #23328
This PR introduces a simple expression calculator
(templates/eval/eval.go), it can do basic expression calculations.
Many untested template helper functions like `Mul` `Add` can be replaced
by this new approach.
Then these `Add` / `Mul` / `percentage` / `Subtract` / `DiffStatsWidth`
could all use this `Eval`.
And it provides enhancements for Golang templates, and improves
readability.
Some examples:
----
* Before: `{{Add (Mul $glyph.Row 12) 12}}`
* After: `{{Eval $glyph.Row "*" 12 "+" 12}}`
----
* Before: `{{if lt (Add $i 1) (len $.Topics)}}`
* After: `{{if Eval $i "+" 1 "<" (len $.Topics)}}`
## FAQ
### Why not use an existing expression package?
We need a highly customized expression engine:
* do the calculation on the fly, without pre-compiling
* deal with int/int64/float64 types, to make the result could be used in
Golang template.
* make the syntax could be used in the Golang template directly
* do not introduce too much complex or strange syntax, we just need a
simple calculator.
* it needs to strictly follow Golang template's behavior, for example,
Golang template treats all non-zero values as truth, but many 3rd
packages don't do so.
### What's the benefit?
* Developers don't need to add more `Add`/`Mul`/`Sub`-like functions,
they were getting more and more.
Now, only one `Eval` is enough for all cases.
* The new code reads better than old `{{Add (Mul $glyph.Row 12) 12}}`,
the old one isn't familiar to most procedural programming developers
(eg, the Golang expression syntax).
* The `Eval` is fully covered by tests, many old `Add`/`Mul`-like
functions were never tested.
### The performance?
It doesn't use `reflect`, it doesn't need to parse or compile when used
in Golang template, the performance is as fast as native Go template.
### Is it too complex? Could it be unstable?
The expression calculator program is a common homework for computer
science students, and it's widely used as a teaching and practicing
purpose for developers. The algorithm is pretty well-known.
The behavior can be clearly defined, it is stable.
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{{ $ in dex = Eval $ in dex "+" 1 }}
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<div class="singular-commit" id=" {{ $ tag }} ">
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<span class="badge badge-commit"> {{ svg "octicon-git-commit" }} </span>
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{{ if .User }}
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<a class="avatar" href=" {{ .User .HomeLink }} "> {{ ctx .AvatarUtils .Avatar .User 2 0 }} </a>
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{{ else }}
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{{ ctx .AvatarUtils .AvatarByEmail .Author .Email .Author .Name 2 0 }}
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{{ end }}
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{{ $ commitLink : = printf "%s/commit/%s" $ .comment .Issue .PullRequest .BaseRepo .Link ( PathEscape .ID .String ) }}
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<span class="tw-flex-1 tw-font-mono gt-ellipsis" title=" {{ .Summary }} ">
{{ - RenderCommitMessageLinkSubject $ .root .Context .Message $ commitLink ( $ .comment .Issue .PullRequest .BaseRepo .ComposeMetas ctx ) - }}
</span>
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{{ if IsMultilineCommitMessage .Message }}
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<button class="ui button ellipsis-button show-panel toggle" data-panel="[data-singular-commit-body-for=' {{ $ tag }} ']">...</button>
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{{ end }}
<span class="shabox tw-flex tw-items-center">
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{{ template "repo/commit_statuses" dict "Status" .Status "Statuses" .Statuses }}
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{{ $ class : = "ui sha label" }}
{{ if .Signature }}
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{{ $ class = ( print $ class " isSigned" ) }}
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{{ if .Verification .Verified }}
{{ if eq .Verification .TrustStatus "trusted" }}
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{{ $ class = ( print $ class " isVerified" ) }}
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{{ else if eq .Verification .TrustStatus "untrusted" }}
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{{ $ class = ( print $ class " isVerifiedUntrusted" ) }}
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{{ else }}
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{{ $ class = ( print $ class " isVerifiedUnmatched" ) }}
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{{ end }}
{{ else if .Verification .Warning }}
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{{ $ class = ( print $ class " isWarning" ) }}
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{{ end }}
{{ end }}
Migrate margin and padding helpers to tailwind (#30043)
This will conclude the refactor of 1:1 class replacements to tailwind,
except `gt-hidden`. Commands ran:
```bash
perl -p -i -e 's#gt-(p|m)([lrtbxy])?-0#tw-$1$2-0#g' {web_src/js,templates,routers,services}/**/*
perl -p -i -e 's#gt-(p|m)([lrtbxy])?-1#tw-$1$2-0.5#g' {web_src/js,templates,routers,services}/**/*
perl -p -i -e 's#gt-(p|m)([lrtbxy])?-2#tw-$1$2-1#g' {web_src/js,templates,routers,services}/**/*
perl -p -i -e 's#gt-(p|m)([lrtbxy])?-3#tw-$1$2-2#g' {web_src/js,templates,routers,services}/**/*
perl -p -i -e 's#gt-(p|m)([lrtbxy])?-4#tw-$1$2-4#g' {web_src/js,templates,routers,services}/**/*
perl -p -i -e 's#gt-(p|m)([lrtbxy])?-5#tw-$1$2-8#g' {web_src/js,templates,routers,services}/**/*
```
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<a href=" {{ $ commitLink }} " rel="nofollow" class="tw-ml-2 {{ $ class }} ">
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<span class="shortsha"> {{ ShortSha .ID .String }} </span>
{{ if .Signature }}
{{ template "repo/shabox_badge" dict "root" $ .root "verification" .Verification }}
{{ end }}
</a>
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</span>
</div>
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{{ if IsMultilineCommitMessage .Message }}
<pre class="commit-body tw-ml-[33px] tw-hidden" data-singular-commit-body-for=" {{ $ tag }} ">
{{ - RenderCommitBody $ .root .Context .Message ( $ .comment .Issue .PullRequest .BaseRepo .ComposeMetas ctx ) - }}
</pre>
{{ end }}
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{{ end }}
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</div>