Make the export line optional (will use in log help)

env.go

@@ -121,11 +121,12 @@ func (kv KeyValue) ToShell() string {
 }
 
 func ToShell(kvl []KeyValue) string {
-	return ToShellWithPrefix("", kvl)
+	return ToShellWithPrefix("", kvl, false /*don't skip export last line*/)
 }
 
 // This convert the key value pairs to bourne shell syntax (vs newer bash export FOO=bar).
-func ToShellWithPrefix(prefix string, kvl []KeyValue) string {
+// If skipExport is true the last line export VAR1 VAR2... is omitted.
+func ToShellWithPrefix(prefix string, kvl []KeyValue, skipExport bool) string {
 	var sb strings.Builder
 	keys := make([]string, 0, len(kvl))
 	for _, kv := range kvl {
@@ -134,9 +135,11 @@ func ToShellWithPrefix(prefix string, kvl []KeyValue) string {
 		sb.WriteRune('\n')
 		keys = append(keys, prefix+kv.Key)
 	}
-	sb.WriteString("export ")
-	sb.WriteString(strings.Join(keys, " "))
-	sb.WriteRune('\n')
+	if !skipExport {
+		sb.WriteString("export ")
+		sb.WriteString(strings.Join(keys, " "))
+		sb.WriteRune('\n')
+	}
 	return sb.String()
 }
 

env_test.go

@@ -158,8 +158,7 @@ func TestStructToEnvVars(t *testing.T) {
 	if len(envVars) != 14 {
 		t.Errorf("expected 14 env vars, got %d: %+v", len(envVars), envVars)
 	}
-	str := ToShellWithPrefix("TST_", envVars)
-	//nolint:lll
+	str := ToShellWithPrefix("TST_", envVars, true)
 	expected := `TST_FOO='a newline:
 foo with $X, ` + "`backticks`" + `, " quotes and \ and '\'' in middle and end '\'''
 TST_BAR='42str'
@@ -175,8 +174,15 @@ TST_RECURSE_HERE_INNER_B='rec b'
 TST_SOME_BINARY='AAEC'
 TST_DUR=3600.1
 TST_TS='1998-11-05T14:30:00Z'
-export TST_FOO TST_BAR TST_A_SPECIAL_BLAH TST_A_BOOL TST_HTTP_SERVER TST_INT_POINTER TST_FLOAT_POINTER TST_INNER_A TST_INNER_B TST_RECURSE_HERE_INNER_A TST_RECURSE_HERE_INNER_B TST_SOME_BINARY TST_DUR TST_TS
 `
+	if str != expected {
+		t.Errorf("\n---expected:---\n%s\n---got:---\n%s", expected, str)
+	}
+	// Again with export:
+	//nolint:lll
+	expected += `export TST_FOO TST_BAR TST_A_SPECIAL_BLAH TST_A_BOOL TST_HTTP_SERVER TST_INT_POINTER TST_FLOAT_POINTER TST_INNER_A TST_INNER_B TST_RECURSE_HERE_INNER_A TST_RECURSE_HERE_INNER_B TST_SOME_BINARY TST_DUR TST_TS
+`
+	str = ToShellWithPrefix("TST_", envVars, false)
 	if str != expected {
 		t.Errorf("\n---expected:---\n%s\n---got:---\n%s", expected, str)
 	}