b88f173c43
This takes some of the machinery from CNI and from the rkt networking code, and turns it into a library that can be linked into go apps. Included is an example command-line application that uses the library, called `cnitool`. Other headline changes: * Plugin exec'ing is factored out The motivation here is to factor out the protocol for invoking plugins. To that end, a generalisation of the code from api.go and pkg/plugin/ipam.go goes into pkg/invoke/exec.go. * Move argument-handling and conf-loading into public API The fact that the arguments get turned into an environment for the plugin is incidental to the API; so, provide a way of supplying them as a struct or saying "just use the same arguments as I got" (the latter is for IPAM plugins).
38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package invoke
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import (
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"os"
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"path/filepath"
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"strings"
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)
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func FindInPath(plugin string, path []string) string {
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for _, p := range path {
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fullname := filepath.Join(p, plugin)
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if fi, err := os.Stat(fullname); err == nil && fi.Mode().IsRegular() {
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return fullname
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}
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}
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return ""
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}
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// Find returns the full path of the plugin by searching in CNI_PATH
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func Find(plugin string) string {
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paths := strings.Split(os.Getenv("CNI_PATH"), ":")
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return FindInPath(plugin, paths)
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}
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