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author | Matthew Heon <matthew.heon@gmail.com> | 2017-11-01 11:24:59 -0400 |
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committer | Matthew Heon <matthew.heon@gmail.com> | 2017-11-01 11:24:59 -0400 |
commit | a031b83a09a8628435317a03f199cdc18b78262f (patch) | |
tree | bc017a96769ce6de33745b8b0b1304ccf38e9df0 /vendor/github.com/containernetworking/cni/pkg/types/args.go | |
parent | 2b74391cd5281f6fdf391ff8ad50fd1490f6bf89 (diff) | |
download | podman-a031b83a09a8628435317a03f199cdc18b78262f.tar.gz podman-a031b83a09a8628435317a03f199cdc18b78262f.tar.bz2 podman-a031b83a09a8628435317a03f199cdc18b78262f.zip |
Initial checkin from CRI-O repo
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Diffstat (limited to 'vendor/github.com/containernetworking/cni/pkg/types/args.go')
-rw-r--r-- | vendor/github.com/containernetworking/cni/pkg/types/args.go | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/vendor/github.com/containernetworking/cni/pkg/types/args.go b/vendor/github.com/containernetworking/cni/pkg/types/args.go new file mode 100644 index 000000000..bd8640fc9 --- /dev/null +++ b/vendor/github.com/containernetworking/cni/pkg/types/args.go @@ -0,0 +1,112 @@ +// Copyright 2015 CNI authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package types + +import ( + "encoding" + "fmt" + "reflect" + "strings" +) + +// UnmarshallableBool typedef for builtin bool +// because builtin type's methods can't be declared +type UnmarshallableBool bool + +// UnmarshalText implements the encoding.TextUnmarshaler interface. +// Returns boolean true if the string is "1" or "[Tt]rue" +// Returns boolean false if the string is "0" or "[Ff]alse" +func (b *UnmarshallableBool) UnmarshalText(data []byte) error { + s := strings.ToLower(string(data)) + switch s { + case "1", "true": + *b = true + case "0", "false": + *b = false + default: + return fmt.Errorf("Boolean unmarshal error: invalid input %s", s) + } + return nil +} + +// UnmarshallableString typedef for builtin string +type UnmarshallableString string + +// UnmarshalText implements the encoding.TextUnmarshaler interface. +// Returns the string +func (s *UnmarshallableString) UnmarshalText(data []byte) error { + *s = UnmarshallableString(data) + return nil +} + +// CommonArgs contains the IgnoreUnknown argument +// and must be embedded by all Arg structs +type CommonArgs struct { + IgnoreUnknown UnmarshallableBool `json:"ignoreunknown,omitempty"` +} + +// GetKeyField is a helper function to receive Values +// Values that represent a pointer to a struct +func GetKeyField(keyString string, v reflect.Value) reflect.Value { + return v.Elem().FieldByName(keyString) +} + +// UnmarshalableArgsError is used to indicate error unmarshalling args +// from the args-string in the form "K=V;K2=V2;..." +type UnmarshalableArgsError struct { + error +} + +// LoadArgs parses args from a string in the form "K=V;K2=V2;..." +func LoadArgs(args string, container interface{}) error { + if args == "" { + return nil + } + + containerValue := reflect.ValueOf(container) + + pairs := strings.Split(args, ";") + unknownArgs := []string{} + for _, pair := range pairs { + kv := strings.Split(pair, "=") + if len(kv) != 2 { + return fmt.Errorf("ARGS: invalid pair %q", pair) + } + keyString := kv[0] + valueString := kv[1] + keyField := GetKeyField(keyString, containerValue) + if !keyField.IsValid() { + unknownArgs = append(unknownArgs, pair) + continue + } + keyFieldIface := keyField.Addr().Interface() + u, ok := keyFieldIface.(encoding.TextUnmarshaler) + if !ok { + return UnmarshalableArgsError{fmt.Errorf( + "ARGS: cannot unmarshal into field '%s' - type '%s' does not implement encoding.TextUnmarshaler", + keyString, reflect.TypeOf(keyFieldIface))} + } + err := u.UnmarshalText([]byte(valueString)) + if err != nil { + return fmt.Errorf("ARGS: error parsing value of pair %q: %v)", pair, err) + } + } + + isIgnoreUnknown := GetKeyField("IgnoreUnknown", containerValue).Bool() + if len(unknownArgs) > 0 && !isIgnoreUnknown { + return fmt.Errorf("ARGS: unknown args %q", unknownArgs) + } + return nil +} |