c4b97fadcc
It turns out that some planned additions to the parser make it so that the map type definition can be ambiguous. As a result, this patch updates the definition so that the map definition is not confused with an open curly bracket anywhere. Thanks to pestle and stbenjamin for their help understanding yacc!
85 lines
2.4 KiB
Go
85 lines
2.4 KiB
Go
// Mgmt
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// Copyright (C) 2013-2018+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package simple // TODO: should this be in its own individual package?
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import (
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"os"
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"strings"
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"github.com/purpleidea/mgmt/lang/types"
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)
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func init() {
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Register("getenv", &types.FuncValue{
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T: types.NewType("func(str) str"),
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V: GetEnv,
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})
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Register("defaultenv", &types.FuncValue{
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T: types.NewType("func(str, str) str"),
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V: DefaultEnv,
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})
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Register("hasenv", &types.FuncValue{
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T: types.NewType("func(str) bool"),
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V: HasEnv,
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})
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Register("env", &types.FuncValue{
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T: types.NewType("func() map{str: str}"),
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V: Env,
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})
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}
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// GetEnv gets environment variable by name or returns empty string if non existing.
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func GetEnv(input []types.Value) (types.Value, error) {
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return &types.StrValue{
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V: os.Getenv(input[0].Str()),
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}, nil
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}
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// DefaultEnv gets environment variable by name or returns default if non existing.
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func DefaultEnv(input []types.Value) (types.Value, error) {
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value, exists := os.LookupEnv(input[0].Str())
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if !exists {
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value = input[1].Str()
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}
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return &types.StrValue{
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V: value,
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}, nil
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}
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// HasEnv returns true if environment variable exists.
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func HasEnv(input []types.Value) (types.Value, error) {
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_, exists := os.LookupEnv(input[0].Str())
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return &types.BoolValue{
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V: exists,
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}, nil
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}
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// Env returns a map of all keys and their values.
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func Env(input []types.Value) (types.Value, error) {
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environ := make(map[types.Value]types.Value)
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for _, keyval := range os.Environ() {
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if i := strings.IndexRune(keyval, '='); i != -1 {
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environ[&types.StrValue{V: keyval[:i]}] = &types.StrValue{V: keyval[i+1:]}
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}
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}
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return &types.MapValue{
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T: types.NewType("map{str: str}"),
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V: environ,
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}, nil
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}
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