9c0bde0b29
This is a newer implementation of the panic magic. I kept the old commit in for posterity and to show the difference. The two versions are identical to the end-user with one exception: the newer version doesn't include a useless panic resource in the graph when there is no panic. In this version, the panic function returns false and the if statement it's the condition of, doesn't produce the resource within. On error, we still consume the function in the if expression, and doing so causes everything to shutdown. The other benefit is that the implementation is much cleaner and doesn't need the interpolate hack.
44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
// Mgmt
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// Copyright (C) 2013-2023+ 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 core
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import (
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"fmt"
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"github.com/purpleidea/mgmt/lang/funcs/simple"
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"github.com/purpleidea/mgmt/lang/types"
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)
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func init() {
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simple.Register("panic", &types.FuncValue{
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T: types.NewType("func(x str) bool"),
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V: Panic,
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})
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}
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// Panic returns an error when it receives a non-empty string. The error should
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// cause the function engine to shutdown. If there's no error, it returns false.
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func Panic(input []types.Value) (types.Value, error) {
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if s := input[0].Str(); s != "" {
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return nil, fmt.Errorf("panic occurred: %s", s)
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}
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return &types.BoolValue{
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V: false,
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}, nil
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}
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