homemaker/environment.go

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/*
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package main
import (
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"fmt"
"log"
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"os"
"strings"
)
type env []string
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func (e env) process(flags int) error {
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items := appendExpEnv(nil, e)
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var value string
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switch {
case len(items) == 0:
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return fmt.Errorf("enviornment element is invalid")
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case len(items) == 1:
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if flags&flagVerbose == flagVerbose {
log.Printf("unsetting variable %s", items[0])
}
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os.Unsetenv(items[0])
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return nil
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case len(items) == 2:
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value = items[1]
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default:
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value = strings.Join(items[1:], ",")
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}
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if flags&flagVerbose == flagVerbose {
log.Printf("setting variable %s to %s", items[0], value)
}
os.Setenv(items[0], value)
return nil
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}