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author | Chris <ccbrown112@gmail.com> | 2017-08-16 17:23:38 -0500 |
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committer | GitHub <noreply@github.com> | 2017-08-16 17:23:38 -0500 |
commit | f80d50adbddf55a043dfcab5b47d7c1e22749b7d (patch) | |
tree | 5deb606debb6322716c9cdcc6c58be4f68b74223 /plugin/manifest.go | |
parent | 4f85ed985d478ddf6692fa4f7d8d98d2a412d18c (diff) | |
download | chat-f80d50adbddf55a043dfcab5b47d7c1e22749b7d.tar.gz chat-f80d50adbddf55a043dfcab5b47d7c1e22749b7d.tar.bz2 chat-f80d50adbddf55a043dfcab5b47d7c1e22749b7d.zip |
PLT-7407: Back-end plugin mechanism (#7177)
* begin backend plugin wip
* flesh out rpcplugin. everything done except for minor supervisor stubs
* done with basic plugin infrastructure
* simplify tests
* remove unused test lines
Diffstat (limited to 'plugin/manifest.go')
-rw-r--r-- | plugin/manifest.go | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/plugin/manifest.go b/plugin/manifest.go new file mode 100644 index 000000000..15b7f0555 --- /dev/null +++ b/plugin/manifest.go @@ -0,0 +1,70 @@ +package plugin + +import ( + "encoding/json" + "io/ioutil" + "os" + "path/filepath" + + "gopkg.in/yaml.v2" +) + +type Manifest struct { + Id string `json:"id" yaml:"id"` + Backend *ManifestBackend `json:"backend,omitempty" yaml:"backend,omitempty"` +} + +type ManifestBackend struct { + Executable string `json:"executable" yaml:"executable"` +} + +// FindManifest will find and parse the manifest in a given directory. +// +// In all cases other than a does-not-exist error, path is set to the path of the manifest file that was +// found. +// +// Manifests are JSON or YAML files named plugin.json, plugin.yaml, or plugin.yml. +func FindManifest(dir string) (manifest *Manifest, path string, err error) { + for _, name := range []string{"plugin.yml", "plugin.yaml"} { + path = filepath.Join(dir, name) + f, ferr := os.Open(path) + if ferr != nil { + if !os.IsNotExist(ferr) { + err = ferr + return + } + continue + } + b, ioerr := ioutil.ReadAll(f) + f.Close() + if ioerr != nil { + err = ioerr + return + } + var parsed Manifest + err = yaml.Unmarshal(b, &parsed) + if err != nil { + return + } + manifest = &parsed + return + } + + path = filepath.Join(dir, "plugin.json") + f, ferr := os.Open(path) + if ferr != nil { + if os.IsNotExist(ferr) { + path = "" + } + err = ferr + return + } + defer f.Close() + var parsed Manifest + err = json.NewDecoder(f).Decode(&parsed) + if err != nil { + return + } + manifest = &parsed + return +} |