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79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
//go:build gorules
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// +build gorules
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package gorules
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// https://github.com/golang/go/wiki/Modules#how-can-i-track-tool-dependencies-for-a-module
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import (
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"github.com/quasilyte/go-ruleguard/dsl"
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//quasilyterules "github.com/quasilyte/ruleguard-rules-test"
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)
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func init() {
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//dsl.ImportRules("qrules", quasilyterules.Bundle)
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}
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func txDeferRollback(m dsl.Matcher) {
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// Common pattern for long-living transactions:
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// tx, err := db.Begin()
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// if err != nil {
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// return err
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// }
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// defer tx.Rollback()
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//
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// ... code which uses database in transaction
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//
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// err := tx.Commit()
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// if err != nil {
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// return err
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// }
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m.Match(
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`$tx, $err := $db.BeginRw($ctx); $chk; $rollback`,
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`$tx, $err = $db.BeginRw($ctx); $chk; $rollback`,
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`$tx, $err := $db.Begin($ctx); $chk; $rollback`,
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`$tx, $err = $db.Begin($ctx); $chk; $rollback`,
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).
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Where(!m["rollback"].Text.Matches(`defer .*\.Rollback()`)).
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//At(m["rollback"]).
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Report(`Add "defer $tx.Rollback()" right after transaction creation error check.
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If you are in the loop - consider use "$db.View" or "$db.Update" or extract whole transaction to function.
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Without rollback in defer - app can deadlock on error or panic.
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Rules are in ./rules.go file.
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`)
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}
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func closeCollector(m dsl.Matcher) {
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m.Match(`$c := etl.NewCollector($*_); $close`).
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Where(!m["close"].Text.Matches(`defer .*\.Close()`)).
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Report(`Add "defer $c.Close()" right after collector creation`)
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}
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func passValuesByContext(m dsl.Matcher) {
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m.Match(`ctx.WithValue($*_)`).Report(`Don't pass app-level parameters by context, pass them as-is or as typed objects`)
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}
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func mismatchingUnlock(m dsl.Matcher) {
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// By default, an entire match position is used as a location.
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// This can be changed by the At() method that binds the location
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// to the provided named submatch.
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//
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// In the rules below text editor would get mismatching method
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// name locations:
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//
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// defer mu.RUnlock()
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// ^^^^^^^
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m.Match(`$mu.Lock(); defer $mu.$unlock()`).
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Where(m["unlock"].Text == "RUnlock").
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At(m["unlock"]).
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Report(`maybe $2mu.Unlock() was intended?
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Rules are in ./rules.go file.`)
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m.Match(`$mu.RLock(); defer $mu.$unlock()`).
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Where(m["unlock"].Text == "Unlock").
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At(m["unlock"]).
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Report(`maybe $mu.RUnlock() was intended?
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Rules are in ./rules.go file.`)
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}
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