feat: add toBool function for template

file/readfile.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
+	"strconv"
 	"strings"
 	"text/template"
 
@@ -145,9 +146,14 @@ func getPrefixedEnvVar(key string) (string, error) {
 	return value, nil
 }
 
+func toBool(key string) (bool, error) {
+	return strconv.ParseBool(key)
+}
+
 func renderTemplate(content string) (string, error) {
 	t := template.New("state").Funcs(template.FuncMap{
-		"env": getPrefixedEnvVar,
+		"env":    getPrefixedEnvVar,
+		"toBool": toBool,
 	}).Delims("${{", "}}")
 	t, err := t.Parse(content)
 	if err != nil {

file/readfile_test.go

@@ -424,6 +424,33 @@ func Test_getContent(t *testing.T) {
 			},
 			wantErr: false,
 		},
+		{
+			name: "file with env var and parse bool",
+			args: args{[]string{"testdata/parsebool/file.yaml"}},
+			envVars: map[string]string{
+				"DECK_MOCKBIN_ENABLED": "true",
+			},
+			want: &Content{
+				Services: []FService{
+					{
+						Service: kong.Service{
+							Name:    kong.String("svc1"),
+							Host:    kong.String("mockbin.org"),
+							Enabled: kong.Bool(true),
+						},
+					},
+				},
+			},
+			wantErr: false,
+		},
+		{
+			name: "file with env var and parse bool - err on bad value",
+			args: args{[]string{"testdata/parsebool/file.yaml"}},
+			envVars: map[string]string{
+				"DECK_MOCKBIN_ENABLED": "RIP",
+			},
+			wantErr: true,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

file/testdata/parsebool/file.yaml

@@ -0,0 +1,4 @@
+services:
+- name: svc1
+  host: mockbin.org
+  enabled: ${{ env "DECK_MOCKBIN_ENABLED" | toBool }}