Demonstrate logging in provider code. (#7)

Add an example of using the tflog package to write a provider log.

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/hashicorp/terraform-plugin-docs v0.5.1
 	github.com/hashicorp/terraform-plugin-framework v0.5.0
 	github.com/hashicorp/terraform-plugin-go v0.5.0
+	github.com/hashicorp/terraform-plugin-log v0.2.1
 	github.com/hashicorp/terraform-plugin-sdk/v2 v2.10.1
 )
 
@@ -34,7 +35,7 @@ require (
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-cty v1.4.1-0.20200414143053-d3edf31b6320 // indirect
 	github.com/hashicorp/go-getter v1.5.3 // indirect
-	github.com/hashicorp/go-hclog v0.16.1 // indirect
+	github.com/hashicorp/go-hclog v1.0.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/hashicorp/go-plugin v1.4.1 // indirect
 	github.com/hashicorp/go-safetemp v1.0.0 // indirect
@@ -45,7 +46,6 @@ require (
 	github.com/hashicorp/logutils v1.0.0 // indirect
 	github.com/hashicorp/terraform-exec v0.15.0 // indirect
 	github.com/hashicorp/terraform-json v0.13.0 // indirect
-	github.com/hashicorp/terraform-plugin-log v0.2.0 // indirect
 	github.com/hashicorp/terraform-registry-address v0.0.0-20210412075316-9b2996cce896 // indirect
 	github.com/hashicorp/terraform-svchost v0.0.0-20200729002733-f050f53b9734 // indirect
 	github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d // indirect

go.sum

@@ -174,8 +174,9 @@ github.com/hashicorp/go-getter v1.5.3 h1:NF5+zOlQegim+w/EUhSLh6QhXHmZMEeHLQzllkQ
 github.com/hashicorp/go-getter v1.5.3/go.mod h1:BrrV/1clo8cCYu6mxvboYg+KutTiFnXjMEgDD8+i7ZI=
 github.com/hashicorp/go-hclog v0.0.0-20180709165350-ff2cf002a8dd/go.mod h1:9bjs9uLqI8l75knNv3lV1kA55veR+WUPSiKIWcQHudI=
 github.com/hashicorp/go-hclog v0.14.1/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
-github.com/hashicorp/go-hclog v0.16.1 h1:IVQwpTGNRRIHafnTs2dQLIk4ENtneRIEEJWOVDqz99o=
 github.com/hashicorp/go-hclog v0.16.1/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
+github.com/hashicorp/go-hclog v1.0.0 h1:bkKf0BeBXcSYa7f5Fyi9gMuQ8gNsxeiNpZjR6VxNZeo=
+github.com/hashicorp/go-hclog v1.0.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
 github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
 github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
 github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
@@ -210,8 +211,9 @@ github.com/hashicorp/terraform-plugin-framework v0.5.0/go.mod h1:rV7pWcX0+tpDLQF
 github.com/hashicorp/terraform-plugin-go v0.4.0/go.mod h1:7u/6nt6vaiwcWE2GuJKbJwNlDFnf5n95xKw4hqIVr58=
 github.com/hashicorp/terraform-plugin-go v0.5.0 h1:+gCDdF0hcYCm0YBTxrP4+K1NGIS5ZKZBKDORBewLJmg=
 github.com/hashicorp/terraform-plugin-go v0.5.0/go.mod h1:PAVN26PNGpkkmsvva1qfriae5Arky3xl3NfzKa8XFVM=
-github.com/hashicorp/terraform-plugin-log v0.2.0 h1:rjflRuBqCnSk3UHOR25MP1G5BDLKktTA6lNjjcAnBfI=
 github.com/hashicorp/terraform-plugin-log v0.2.0/go.mod h1:E1kJmapEHzqu1x6M++gjvhzM2yMQNXPVWZRCB8sgYjg=
+github.com/hashicorp/terraform-plugin-log v0.2.1 h1:hl0G6ctSx7DRTE62VNsPWrq7d+JWy1kjk9ApOFrCq3I=
+github.com/hashicorp/terraform-plugin-log v0.2.1/go.mod h1:RW/n0x4dyITmenuirZ1ViPQGP5JQdPTZ4Wwc0rLKi94=
 github.com/hashicorp/terraform-plugin-sdk/v2 v2.10.1 h1:B9AocC+dxrCqcf4vVhztIkSkt3gpRjUkEka8AmZWGlQ=
 github.com/hashicorp/terraform-plugin-sdk/v2 v2.10.1/go.mod h1:FjM9DXWfP0w/AeOtJoSKHBZ01LqmaO6uP4bXhv3fekw=
 github.com/hashicorp/terraform-registry-address v0.0.0-20210412075316-9b2996cce896 h1:1FGtlkJw87UsTMg5s8jrekrHmUPUJaMcu6ELiVhQrNw=

internal/provider/example_resource.go

@@ -7,6 +7,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-framework/tfsdk"
 	"github.com/hashicorp/terraform-plugin-framework/types"
 	"github.com/hashicorp/terraform-plugin-go/tftypes"
+	"github.com/hashicorp/terraform-plugin-log/tflog"
 )
 
 type exampleResourceType struct{}
@@ -73,6 +74,11 @@ func (r exampleResource) Create(ctx context.Context, req tfsdk.CreateResourceReq
 	// save into the Terraform state.
 	data.Id = types.String{Value: "example-id"}
 
+	// write logs using the tflog package
+	// see https://pkg.go.dev/github.com/hashicorp/terraform-plugin-log/tflog
+	// for more information
+	tflog.Trace(ctx, "created a resource")
+
 	diags = resp.State.Set(ctx, &data)
 	resp.Diagnostics.Append(diags...)
 }