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author | Flavio Castelli <fcastelli@suse.com> | 2017-05-03 11:37:08 +0200 |
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committer | Alvaro <alvaro.saurin@gmail.com> | 2017-05-03 11:40:31 +0200 |
commit | ee12004ab93e54f326896e9909ba9e6a2bd11e89 (patch) | |
tree | 1ea30d204b04425ebd1dadaf8cc991d572c7f0fb /vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go | |
parent | a286dc5494691c2b04c48ef6695ed0c902912c0f (diff) | |
download | terraform-provider-libvirt-ee12004ab93e54f326896e9909ba9e6a2bd11e89.tar terraform-provider-libvirt-ee12004ab93e54f326896e9909ba9e6a2bd11e89.tar.gz |
Vendor dependencies with vndr
This fixes issue #123
Diffstat (limited to 'vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go')
-rw-r--r-- | vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go b/vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go new file mode 100644 index 00000000..f298d659 --- /dev/null +++ b/vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go @@ -0,0 +1,102 @@ +package credentials + +import ( + "github.com/aws/aws-sdk-go/aws/awserr" +) + +var ( + // ErrNoValidProvidersFoundInChain Is returned when there are no valid + // providers in the ChainProvider. + // + // This has been deprecated. For verbose error messaging set + // aws.Config.CredentialsChainVerboseErrors to true + // + // @readonly + ErrNoValidProvidersFoundInChain = awserr.New("NoCredentialProviders", + `no valid providers in chain. Deprecated. + For verbose messaging see aws.Config.CredentialsChainVerboseErrors`, + nil) +) + +// A ChainProvider will search for a provider which returns credentials +// and cache that provider until Retrieve is called again. +// +// The ChainProvider provides a way of chaining multiple providers together +// which will pick the first available using priority order of the Providers +// in the list. +// +// If none of the Providers retrieve valid credentials Value, ChainProvider's +// Retrieve() will return the error ErrNoValidProvidersFoundInChain. +// +// If a Provider is found which returns valid credentials Value ChainProvider +// will cache that Provider for all calls to IsExpired(), until Retrieve is +// called again. +// +// Example of ChainProvider to be used with an EnvProvider and EC2RoleProvider. +// In this example EnvProvider will first check if any credentials are available +// via the environment variables. If there are none ChainProvider will check +// the next Provider in the list, EC2RoleProvider in this case. If EC2RoleProvider +// does not return any credentials ChainProvider will return the error +// ErrNoValidProvidersFoundInChain +// +// creds := credentials.NewChainCredentials( +// []credentials.Provider{ +// &credentials.EnvProvider{}, +// &ec2rolecreds.EC2RoleProvider{ +// Client: ec2metadata.New(sess), +// }, +// }) +// +// // Usage of ChainCredentials with aws.Config +// svc := ec2.New(session.Must(session.NewSession(&aws.Config{ +// Credentials: creds, +// }))) +// +type ChainProvider struct { + Providers []Provider + curr Provider + VerboseErrors bool +} + +// NewChainCredentials returns a pointer to a new Credentials object +// wrapping a chain of providers. +func NewChainCredentials(providers []Provider) *Credentials { + return NewCredentials(&ChainProvider{ + Providers: append([]Provider{}, providers...), + }) +} + +// Retrieve returns the credentials value or error if no provider returned +// without error. +// +// If a provider is found it will be cached and any calls to IsExpired() +// will return the expired state of the cached provider. +func (c *ChainProvider) Retrieve() (Value, error) { + var errs []error + for _, p := range c.Providers { + creds, err := p.Retrieve() + if err == nil { + c.curr = p + return creds, nil + } + errs = append(errs, err) + } + c.curr = nil + + var err error + err = ErrNoValidProvidersFoundInChain + if c.VerboseErrors { + err = awserr.NewBatchError("NoCredentialProviders", "no valid providers in chain", errs) + } + return Value{}, err +} + +// IsExpired will returned the expired state of the currently cached provider +// if there is one. If there is no current provider, true will be returned. +func (c *ChainProvider) IsExpired() bool { + if c.curr != nil { + return c.curr.IsExpired() + } + + return true +} |