forked from Francesco149/sharenix
/
plugins.go
71 lines (65 loc) · 2.22 KB
/
plugins.go
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/*
Copyright 2014 Franc[e]sco (lolisamurai@tfwno.gf)
This file is part of sharenix.
sharenix 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.
sharenix 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 sharenix. If not, see <http://www.gnu.org/licenses/>.
*/
package sharenixlib
import (
"bytes"
"fmt"
"os/exec"
"path"
)
// RunPlugin starts pluginName in the plugin directory passing command-line
// params in the following format:
// pluginName -param1Name=param1Value ... -paramXName=paramXValue param_tail
// For example, calling
// RunPlugin("foo", map[string]string{
// "hello": "world",
// "someflag": "true",
// "_tail": "bar",
// })
// will execute
// foo -hello=world -someflag=true bar
// Returns the last line outputted to stdout by the plugin and an error if any.
// Any trailing newlines at the end of the output are stripped.
func RunPlugin(pluginName string,
extraParams map[string]string) (output string, err error) {
formattedArgs := []string{extraParams["_tail"]}
delete(extraParams, "_tail")
for paramName, paramValue := range extraParams {
formattedArgs = append(
[]string{fmt.Sprintf("-%s=%s", paramName, paramValue)},
formattedArgs...)
}
pluginsDir, err := GetPluginsDir()
if err != nil {
return
}
outdata, err := exec.Command(path.Join(pluginsDir, pluginName),
formattedArgs...).CombinedOutput()
DebugPrintln("exec.CombinedOutput returned:\n",
string(outdata), "with error", err)
if len(outdata) == 0 && err == nil {
err = fmt.Errorf("Plugin did not return any output.")
return
}
outdata = bytes.TrimSuffix(outdata, []byte{0x0A})
ilastline := bytes.LastIndex(outdata, []byte{0x0A})
if ilastline != -1 {
outdata = outdata[ilastline+1:]
} else {
DebugPrintln("Plugin output was one line long")
}
output = string(outdata)
return
}