Replace accidentally-removed public constants (#2370)

These were removed in #2322, which made it an accidentally-semver-breaking
change. This unbreaks semver.

These should be removed at the next major version release or sooner if we decide
keeping semver is not important.

Signed-off-by: Zachary Newman <zjn@chainguard.dev>

Signed-off-by: Zachary Newman <zjn@chainguard.dev>

pkg/oci/mediatypes.go

@@ -21,6 +21,11 @@ import (
 	"github.com/sigstore/cosign/pkg/cosign/env"
 )
 
+const (
+	// Deprecated: use `pkg/cosign/env/VariableDockerMediaTypes` instead.
+	DockerMediaTypesEnv = env.VariableDockerMediaTypes
+)
+
 func DockerMediaTypes() bool {
 	if b, err := strconv.ParseBool(env.Getenv(env.VariableDockerMediaTypes)); err == nil {
 		return b

pkg/providers/github/github.go

@@ -24,6 +24,13 @@ import (
 	"github.com/sigstore/cosign/pkg/providers"
 )
 
+const (
+	// Deprecated: use `env.VariableGitHubRequestToken` instead
+	RequestTokenEnvKey = env.VariableGitHubRequestToken
+	// Deprecated: use `env.VariableGitHubRequestURL` instead
+	RequestURLEnvKey = env.VariableGitHubRequestURL
+)
+
 func init() {
 	providers.Register("github-actions", &githubActions{})
 }