add back depguard - yet OpenPeeDeeP/depguard#66. add note about go ve…

…rsion(s)

.golangci.yml

@@ -107,7 +107,6 @@ linters:
     - cyclop
     - forcetypeassert
     - ireturn
-    - depguard
   enable-all: true
   disable-all: false
   # Must not use fast: true in newer golangci-lint or it'll just skip a bunch of linter instead of doing caching like before (!)

README.md

@@ -3,9 +3,11 @@ Convert between go structures to environment variable and back (for structured c
 
 There are many go packages that are doing environment to go struct config (for instance https://github.com/kelseyhightower/envconfig) but I didn't find one doing the inverse and we needed to set a bunch of environment variables for shell and other tools to get some configuration structured as JSON and Go object, so this was born. For symetry the reverse was also added (history of commit on https://github.com/fortio/dflag/pull/50/commits)
 
-Standalone package with 0 dependencies outside of the go standard library.
+Standalone package with 0 dependencies outside of the go standard library. Developed with go 1.20 but tested with go as old as 1.17
+but should works with pretty much any go version, as it only depends on reflection and strconv.
 
-The unit test has a fairly extensive example on how
+
+The unit test has a fairly extensive example on how:
 ```go
 type FooConfig struct {
 	Foo          string

env_test.go

@@ -1,12 +1,10 @@
-package struct2env_test
+package struct2env
 
 import (
 	"os"
 	"reflect"
 	"strings"
 	"testing"
-
-	"fortio.org/struct2env"
 )
 
 func TestSplitByCase(t *testing.T) {
@@ -35,7 +33,7 @@ func TestSplitByCase(t *testing.T) {
 		{"AABbbCcc", []string{"AA", "Bbb", "Ccc"}},
 	}
 	for _, test := range tests {
-		got := struct2env.SplitByCase(test.in)
+		got := SplitByCase(test.in)
 		if !reflect.DeepEqual(got, test.out) {
 			t.Errorf("mismatch for %q: got %v expected %v", test.in, got, test.out)
 		}
@@ -62,11 +60,11 @@ func TestCamelCaseToSnakeCase(t *testing.T) {
 		{"HTTPSServer42", "HTTPS_SERVER42"},
 	}
 	for _, test := range tests {
-		if got := struct2env.CamelCaseToUpperSnakeCase(test.in); got != test.out {
+		if got := CamelCaseToUpperSnakeCase(test.in); got != test.out {
 			t.Errorf("for %q expected upper %q and got %q", test.in, test.out, got)
 		}
 		lower := strings.ToLower(test.out)
-		if got := struct2env.CamelCaseToLowerSnakeCase(test.in); got != lower {
+		if got := CamelCaseToLowerSnakeCase(test.in); got != lower {
 			t.Errorf("for %q expected lower %q and got %q", test.in, lower, got)
 		}
 	}
@@ -91,7 +89,7 @@ func TestCamelCaseToLowerKebabCase(t *testing.T) {
 		{"HTTPSServer42", "https-server42"},
 	}
 	for _, test := range tests {
-		if got := struct2env.CamelCaseToLowerKebabCase(test.in); got != test.out {
+		if got := CamelCaseToLowerKebabCase(test.in); got != test.out {
 			t.Errorf("for %q expected %q and got %q", test.in, test.out, got)
 		}
 	}
@@ -140,21 +138,21 @@ func TestStructToEnvVars(t *testing.T) {
 	}
 	foo.InnerA = "inner a"
 	foo.InnerB = "inner b"
-	empty, errors := struct2env.StructToEnvVars(42) // error/empty
+	empty, errors := StructToEnvVars(42) // error/empty
 	if len(empty) != 0 {
 		t.Errorf("expected empty, got %v", empty)
 	}
 	if len(errors) != 1 {
 		t.Errorf("expected errors, got %v", errors)
 	}
-	envVars, errors := struct2env.StructToEnvVars(&foo)
+	envVars, errors := StructToEnvVars(&foo)
 	if len(errors) != 0 {
 		t.Errorf("expected no error, got %v", errors)
 	}
 	if len(envVars) != 11 {
 		t.Errorf("expected 11 env vars, got %d: %+v", len(envVars), envVars)
 	}
-	str := struct2env.ToShellWithPrefix("TST_", envVars)
+	str := ToShellWithPrefix("TST_", envVars)
 	//nolint:lll
 	expected := `TST_FOO="a\nfoo with \" quotes and \\ and '"
 TST_BAR="42str"
@@ -191,7 +189,7 @@ func TestSetFromEnv(t *testing.T) {
 	for _, e := range envs {
 		os.Setenv(e.k, e.v)
 	}
-	errors := struct2env.SetFromEnv("TST2_", &foo)
+	errors := SetFromEnv("TST2_", &foo)
 	if len(errors) != 0 {
 		t.Errorf("Unexpectedly got errors :%v", errors)
 	}

go.mod

@@ -1,3 +1,5 @@
 module fortio.org/struct2env
 
-go 1.20
+// Developed with go 1.20 but tested with go as old as 1.17
+// but works with pretty much any version, only depends on reflection and strconv
+go 1.17