From cd3f64f045bb42ea6aa96ae60231e3817380a543 Mon Sep 17 00:00:00 2001
From: Alec Thomas <alec@swapoff.org>
Date: Wed, 13 Nov 2019 08:16:32 +1100
Subject: [PATCH] Support "yes", "1" and "true" for bool values.

---
 .circleci/config.yml |  2 +-
 .golangci.yml        |  3 +++
 go.mod               |  2 ++
 mapper.go            | 12 +++++++++++-
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 035a373..eb50adf 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -12,7 +12,7 @@ jobs:
           command: |
             go get -v github.com/jstemmer/go-junit-report
             go get -v -t -d ./...
-            curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s v1.15.0
+            curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s v1.21.0
             mkdir ~/report
           when: always
       - run:
diff --git a/.golangci.yml b/.golangci.yml
index 0b9ebc2..48925a8 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -10,6 +10,9 @@ linters:
     - maligned
     - lll
     - gochecknoglobals
+    - wsl
+    - funlen
+    - gocognit
 
 linters-settings:
   govet:
diff --git a/go.mod b/go.mod
index 757bb09..c6f418f 100644
--- a/go.mod
+++ b/go.mod
@@ -7,3 +7,5 @@ require (
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/stretchr/testify v1.2.2
 )
+
+go 1.13
diff --git a/mapper.go b/mapper.go
index 58e45bb..a2a60e4 100644
--- a/mapper.go
+++ b/mapper.go
@@ -217,7 +217,17 @@ func (boolMapper) Decode(ctx *DecodeContext, target reflect.Value) error {
 		token := ctx.Scan.Pop()
 		switch v := token.Value.(type) {
 		case string:
-			target.SetBool(strings.ToLower(v) == "true")
+			v = strings.ToLower(v)
+			switch v {
+			case "true", "1", "yes":
+				target.SetBool(true)
+
+			case "false", "0", "no":
+				target.SetBool(false)
+
+			default:
+				return errors.Errorf("bool value must be true, 1, yes, false, 0 or no but got %q", v)
+			}
 
 		case bool:
 			target.SetBool(v)