56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
package s1024
|
|
|
|
import (
|
|
"go/ast"
|
|
|
|
"honnef.co/go/tools/analysis/code"
|
|
"honnef.co/go/tools/analysis/edit"
|
|
"honnef.co/go/tools/analysis/facts/generated"
|
|
"honnef.co/go/tools/analysis/lint"
|
|
"honnef.co/go/tools/analysis/report"
|
|
"honnef.co/go/tools/pattern"
|
|
|
|
"golang.org/x/tools/go/analysis"
|
|
)
|
|
|
|
var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
|
|
Analyzer: &analysis.Analyzer{
|
|
Name: "S1024",
|
|
Run: run,
|
|
Requires: append([]*analysis.Analyzer{generated.Analyzer}, code.RequiredAnalyzers...),
|
|
},
|
|
Doc: &lint.RawDocumentation{
|
|
Title: `Replace \'x.Sub(time.Now())\' with \'time.Until(x)\'`,
|
|
Text: `The \'time.Until\' helper has the same effect as using \'x.Sub(time.Now())\'
|
|
but is easier to read.`,
|
|
Before: `x.Sub(time.Now())`,
|
|
After: `time.Until(x)`,
|
|
Since: "2017.1",
|
|
MergeIf: lint.MergeIfAny,
|
|
},
|
|
})
|
|
|
|
var Analyzer = SCAnalyzer.Analyzer
|
|
|
|
var (
|
|
checkTimeUntilQ = pattern.MustParse(`(CallExpr (Symbol "(time.Time).Sub") [(CallExpr (Symbol "time.Now") [])])`)
|
|
checkTimeUntilR = pattern.MustParse(`(CallExpr (SelectorExpr (Ident "time") (Ident "Until")) [arg])`)
|
|
)
|
|
|
|
func run(pass *analysis.Pass) (any, error) {
|
|
for node := range code.Matches(pass, checkTimeUntilQ) {
|
|
if sel, ok := node.(*ast.CallExpr).Fun.(*ast.SelectorExpr); ok {
|
|
r := pattern.NodeToAST(checkTimeUntilR.Root, map[string]any{"arg": sel.X}).(ast.Node)
|
|
report.Report(pass, node, "should use time.Until instead of t.Sub(time.Now())",
|
|
report.FilterGenerated(),
|
|
report.MinimumStdlibVersion("go1.8"),
|
|
report.Fixes(edit.Fix("Replace with call to time.Until", edit.ReplaceWithNode(pass.Fset, node, r))))
|
|
} else {
|
|
report.Report(pass, node, "should use time.Until instead of t.Sub(time.Now())",
|
|
report.MinimumStdlibVersion("go1.8"),
|
|
report.FilterGenerated())
|
|
}
|
|
}
|
|
return nil, nil
|
|
}
|