mirror of
https://github.com/go-gitea/gitea.git
synced 2026-08-01 09:30:38 +00:00
Shudhanshu Singh
d87d26d735
This pull request optimizes code diff highlighting in the PR Files Changed view, which is a major CPU bottleneck and hot path in production. Previously, Gitea executed the expensive `DiffMatchPatch` algorithm twice for every matching deleted/added line pair (once for the deleted line, and once for the added line). We now run the diff algorithm once and cache the resulting `DiffInline` on the `DiffLine` struct itself, allowing the second line to render via a 0-cost cache lookup. --------- Co-authored-by: wxiaoguang <wxiaoguang@gmail.com> Co-authored-by: silverwind <me@silverwind.io>
75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
// Copyright 2026 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package highlight
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestDetectChromaLexer(t *testing.T) {
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globalVars().highlightMapping[".my-html"] = "HTML"
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t.Cleanup(func() { delete(globalVars().highlightMapping, ".my-html") })
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casesWithContent := []struct {
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fileName string
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language string
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content string
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expected string
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}{
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{"test.v", "", "", "V"},
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{"test.v", "any-lang-name", "", "V"},
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{"any-file", "javascript", "", "JavaScript"},
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{"any-file", "", "/* vim: set filetype=python */", "Python"},
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{"any-file", "", "", "fallback"},
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{"test.fs", "", "", "FSharp"},
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{"test.fs", "F#", "", "FSharp"},
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{"test.fs", "", "let x = 1", "FSharp"},
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{"test.c", "", "", "C"},
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{"test.C", "", "", "C++"},
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{"OLD-CODE.PAS", "", "", "ObjectPascal"},
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{"test.my-html", "", "", "HTML"},
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{"a.php", "", "", "PHP"},
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{"a.sql", "", "", "SQL"},
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{"dhcpd.conf", "", "", "ISCdhcpd"},
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{".env.my-production", "", "", "Bash"},
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{"a.hcl", "", "", "HCL"}, // not the same as Chroma, enry detects "*.hcl" as "HCL"
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{"a.hcl", "HCL", "", "HCL"},
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{"a.hcl", "Terraform", "", "Terraform"},
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}
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for _, c := range casesWithContent {
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lexer := detectChromaLexerWithAnalyze(c.fileName, c.language, []byte(c.content))
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if assert.NotNil(t, lexer, "case: %+v", c) {
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assert.Equal(t, c.expected, lexer.Config().Name, "case: %+v", c)
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}
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}
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casesNameLang := []struct {
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fileName string
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language string
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expected string
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byLang bool
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}{
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{"a.v", "", "V", false},
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{"a.v", "V", "V", true},
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{"a.v", "verilog", "verilog", true},
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{"a.v", "any-lang-name", "V", false},
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{"a.hcl", "", "Terraform", false}, // not the same as enry
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{"a.hcl", "HCL", "HCL", true},
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{"a.hcl", "Terraform", "Terraform", true},
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}
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for _, c := range casesNameLang {
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lexer, byLang := detectChromaLexerByFileName(c.fileName, c.language)
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assert.Equal(t, c.expected, lexer.Config().Name, "case: %+v", c)
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assert.Equal(t, c.byLang, byLang, "case: %+v", c)
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}
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}
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