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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package plugin | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "log" | ||
|
|
||
| "google.golang.org/grpc/codes" | ||
| "google.golang.org/grpc/status" | ||
|
|
||
| "github.com/hashicorp/hcl/v2" | ||
|
|
||
| "github.com/turbot/steampipe-plugin-sdk/plugin/schema" | ||
|
|
||
| "github.com/hashicorp/hcl/v2/hcldec" | ||
| "github.com/hashicorp/hcl/v2/hclparse" | ||
| "github.com/turbot/go-kit/helpers" | ||
| "github.com/zclconf/go-cty/cty/gocty" | ||
| ) | ||
|
|
||
| type ConnectionConfigInstanceFunc func() interface{} | ||
|
|
||
| type Connection struct { | ||
| Name string | ||
| // the connection config | ||
| // NOTE: we always pass and store connection config BY VALUE | ||
| Config interface{} | ||
| } | ||
|
|
||
| // ConnectionConfigSchema :: struct used to define the connection config schema and store the config for each plugin connection | ||
| type ConnectionConfigSchema struct { | ||
| Schema map[string]*schema.Attribute | ||
| // function which returns an instance of a connection config struct | ||
| NewInstance ConnectionConfigInstanceFunc | ||
| } | ||
|
|
||
| func NewConnectionConfigSchema() *ConnectionConfigSchema { | ||
| return &ConnectionConfigSchema{ | ||
| Schema: map[string]*schema.Attribute{}, | ||
| } | ||
| } | ||
|
|
||
| // Parse :: parse the hcl string into a connection config struct. | ||
| // The schema and the struct to parse into are provided by the plugin | ||
| func (c *ConnectionConfigSchema) Parse(configString string) (config interface{}, err error) { | ||
| defer func() { | ||
| if r := recover(); r != nil { | ||
| log.Printf("[WARN] ConnectionConfigSchema Parse caught a panic: %v\n", r) | ||
| err = status.Error(codes.Internal, fmt.Sprintf("ConnectionConfigSchema Parse failed with panic %v", r)) | ||
| } | ||
| }() | ||
|
|
||
| // ensure a schema is set | ||
| if len(c.Schema) == 0 { | ||
| return nil, fmt.Errorf("cannot parse connection config as no config schema is set in the connection config") | ||
| } | ||
| if c.NewInstance == nil { | ||
| return nil, fmt.Errorf("cannot parse connection config as no NewInstance function is specified in the connection config") | ||
| } | ||
| configStruct := c.NewInstance() | ||
| spec := schema.SchemaToObjectSpec(c.Schema) | ||
| parser := hclparse.NewParser() | ||
|
|
||
| file, diags := parser.ParseHCL([]byte(configString), "/") | ||
| if diags.HasErrors() { | ||
| return nil, DiagsToError("failed to parse connection config", diags) | ||
| } | ||
| value, diags := hcldec.Decode(file.Body, spec, nil) | ||
| if diags.HasErrors() { | ||
| return nil, DiagsToError("failed to parse connection config", diags) | ||
| } | ||
|
|
||
| // decode into the provided struct | ||
| if err := gocty.FromCtyValue(value, configStruct); err != nil { | ||
| return nil, fmt.Errorf("Failed to marshal parsed config into config struct: %v", err) | ||
| } | ||
|
|
||
| // return the struct by value | ||
| return helpers.DereferencePointer(configStruct), nil | ||
| } | ||
|
|
||
| // convert hcl diags into an error | ||
| func DiagsToError(prefix string, diags hcl.Diagnostics) error { | ||
| // convert the first diag into an error | ||
| if !diags.HasErrors() { | ||
| return nil | ||
| } | ||
| for _, diag := range diags { | ||
| if diag.Severity == hcl.DiagError { | ||
| errString := fmt.Sprintf("%s: ", diag.Summary) | ||
| if diag.Detail != "" { | ||
| errString += fmt.Sprintf(": %s", diag.Detail) | ||
| } | ||
| if prefix != "" { | ||
| errString = fmt.Sprintf("%s: %s", prefix, errString) | ||
| } | ||
| return errors.New(errString) | ||
| } | ||
| } | ||
| return diags.Errs()[0] | ||
| } |
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