From 8b0922a0197bd5bc390c6521efd8323f5e928857 Mon Sep 17 00:00:00 2001
From: Sergey Vilgelm <sergey.vilgelm@ibm.com>
Date: Thu, 25 Feb 2021 22:47:22 -0600
Subject: [PATCH] Integrate ImportAs linter

---
 pkg/config/config.go          |  3 +++
 pkg/golinters/importas.go     | 25 +++++++++++++++++++++++++
 pkg/lint/lintersdb/manager.go |  6 ++++++
 3 files changed, 34 insertions(+)
 create mode 100644 pkg/golinters/importas.go

diff --git a/pkg/config/config.go b/pkg/config/config.go
index fdf57875c0c1..202ae6bc44cb 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -275,6 +275,7 @@ type LintersSettings struct {
 	Ifshort          IfshortSettings
 	Predeclared      PredeclaredSettings
 	Cyclop           Cyclop
+	ImportAs         ImportAsSettings
 
 	Custom map[string]CustomLinterSettings
 }
@@ -461,6 +462,8 @@ type Cyclop struct {
 	SkipTests      bool    `mapstructure:"skip-tests"`
 }
 
+type ImportAsSettings map[string]string
+
 var defaultLintersSettings = LintersSettings{
 	Lll: LllSettings{
 		LineLength: 120,
diff --git a/pkg/golinters/importas.go b/pkg/golinters/importas.go
new file mode 100644
index 000000000000..5ab34e034638
--- /dev/null
+++ b/pkg/golinters/importas.go
@@ -0,0 +1,25 @@
+package golinters
+
+import (
+	"fmt"
+
+	"github.com/julz/importas"
+	"golang.org/x/tools/go/analysis"
+
+	"github.com/golangci/golangci-lint/pkg/config"
+	"github.com/golangci/golangci-lint/pkg/golinters/goanalysis"
+)
+
+func NewImportAs(cfg *config.ImportAsSettings) *goanalysis.Linter {
+	analyzer := importas.Analyzer
+	for alias, pkg := range *cfg {
+		analyzer.Flags.Set("alias", fmt.Sprintf("%s:%s", pkg, alias))
+	}
+
+	return goanalysis.NewLinter(
+		analyzer.Name,
+		analyzer.Doc,
+		[]*analysis.Analyzer{analyzer},
+		nil,
+	).WithLoadMode(goanalysis.LoadModeTypesInfo)
+}
diff --git a/pkg/lint/lintersdb/manager.go b/pkg/lint/lintersdb/manager.go
index 17f621898d75..8881bc46f579 100644
--- a/pkg/lint/lintersdb/manager.go
+++ b/pkg/lint/lintersdb/manager.go
@@ -99,6 +99,7 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 	var ifshortCfg *config.IfshortSettings
 	var reviveCfg *config.ReviveSettings
 	var cyclopCfg *config.Cyclop
+	var importAsCfg *config.ImportAsSettings
 	if m.cfg != nil {
 		govetCfg = &m.cfg.LintersSettings.Govet
 		testpackageCfg = &m.cfg.LintersSettings.Testpackage
@@ -110,6 +111,7 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 		ifshortCfg = &m.cfg.LintersSettings.Ifshort
 		reviveCfg = &m.cfg.LintersSettings.Revive
 		cyclopCfg = &m.cfg.LintersSettings.Cyclop
+		importAsCfg = &m.cfg.LintersSettings.ImportAs
 	}
 	const megacheckName = "megacheck"
 	lcs := []*linter.Config{
@@ -380,6 +382,10 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 			WithPresets(linter.PresetStyle).
 			WithLoadForGoAnalysis().
 			WithURL("https://github.com/sanposhiho/wastedassign"),
+		linter.NewConfig(golinters.NewImportAs(importAsCfg)).
+			WithPresets(linter.PresetStyle).
+			WithLoadForGoAnalysis().
+			WithURL("https://github.com/julz/importas"),
 
 		// nolintlint must be last because it looks at the results of all the previous linters for unused nolint directives
 		linter.NewConfig(golinters.NewNoLintLint()).