lang: funcs: Add a trim space function to the new strings module

lang/funcs/core/core.go

@@ -24,5 +24,6 @@ import (
 	_ "github.com/purpleidea/mgmt/lang/funcs/core/corefmt"
 	_ "github.com/purpleidea/mgmt/lang/funcs/core/coremath"
 	_ "github.com/purpleidea/mgmt/lang/funcs/core/coreos"
+	_ "github.com/purpleidea/mgmt/lang/funcs/core/corestrings"
 	_ "github.com/purpleidea/mgmt/lang/funcs/core/coresys"
 )

lang/funcs/core/corestrings/corestrings.go

@@ -0,0 +1,23 @@
+// Mgmt
+// Copyright (C) 2013-2018+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package corestrings
+
+const (
+	// moduleName is the prefix given to all the functions in this module.
+	moduleName = "strings"
+)

lang/funcs/core/corestrings/trim_space_func.go

@@ -0,0 +1,36 @@
+// Mgmt
+// Copyright (C) 2013-2018+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package corestrings
+
+import (
+	"strings"
+
+	"github.com/purpleidea/mgmt/lang/funcs/simple"
+	"github.com/purpleidea/mgmt/lang/types"
+)
+
+func init() {
+	simple.ModuleRegister(moduleName, "trim_space", &types.FuncValue{
+		T: types.NewType("func(a str) str"),
+		V: func(input []types.Value) (types.Value, error) {
+			return &types.StrValue{
+				V: strings.TrimSpace(input[0].Str()),
+			}, nil
+		},
+	})
+}