terraform init: add link to documentation when a checksum is missing from the lock file

internal/getproviders/errors.go

@@ -210,7 +210,7 @@ func (err ErrQueryFailed) Unwrap() error {
 	return err.Wrapped
 }
 
-// ErrRequestCancelled is an error type used to indicate that an operation
+// ErrRequestCanceled is an error type used to indicate that an operation
 // failed due to being cancelled via the given context.Context object.
 //
 // This error type doesn't include information about what was cancelled,

internal/providercache/installer_test.go

@@ -1311,7 +1311,7 @@ func TestEnsureProviderVersions(t *testing.T) {
 				beepProvider: getproviders.MustParseVersionConstraints(">= 1.0.0"),
 			},
 			WantErr: `some providers could not be installed:
-- example.com/foo/beep: the local package for example.com/foo/beep 1.0.0 doesn't match any of the checksums previously recorded in the dependency lock file (this might be because the available checksums are for packages targeting different platforms)`,
+- example.com/foo/beep: the local package for example.com/foo/beep 1.0.0 doesn't match any of the checksums previously recorded in the dependency lock file (this might be because the available checksums are for packages targeting different platforms), for more information: https://www.terraform.io/language/provider-checksum-verification`,
 			WantEvents: func(inst *Installer, dir *Dir) map[addrs.Provider][]*testInstallerEventLogItem {
 				return map[addrs.Provider][]*testInstallerEventLogItem{
 					noProvider: {
@@ -1357,7 +1357,7 @@ func TestEnsureProviderVersions(t *testing.T) {
 								Error   string
 							}{
 								"1.0.0",
-								`the local package for example.com/foo/beep 1.0.0 doesn't match any of the checksums previously recorded in the dependency lock file (this might be because the available checksums are for packages targeting different platforms)`,
+								`the local package for example.com/foo/beep 1.0.0 doesn't match any of the checksums previously recorded in the dependency lock file (this might be because the available checksums are for packages targeting different platforms), for more information: https://www.terraform.io/language/provider-checksum-verification`,
 							},
 						},
 					},

internal/providercache/package_install.go

@@ -117,7 +117,7 @@ func installFromLocalArchive(ctx context.Context, meta getproviders.PackageMeta,
 			)
 		} else if !matches {
 			return authResult, fmt.Errorf(
-				"the current package for %s %s doesn't match any of the checksums previously recorded in the dependency lock file",
+				"the current package for %s %s doesn't match any of the checksums previously recorded in the dependency lock file, for more information: https://www.terraform.io/language/provider-checksum-verification",
 				meta.Provider, meta.Version,
 			)
 		}
@@ -199,7 +199,7 @@ func installFromLocalDir(ctx context.Context, meta getproviders.PackageMeta, tar
 			)
 		} else if !matches {
 			return authResult, fmt.Errorf(
-				"the local package for %s %s doesn't match any of the checksums previously recorded in the dependency lock file (this might be because the available checksums are for packages targeting different platforms)",
+				"the local package for %s %s doesn't match any of the checksums previously recorded in the dependency lock file (this might be because the available checksums are for packages targeting different platforms), for more information: https://www.terraform.io/language/provider-checksum-verification",
 				meta.Provider, meta.Version,
 			)
 		}