regression: tls verify should be set on registries.conf if insecure

In the case where podman needs to pull an image, if that registry that the image
resides on is known to be insesure (as defined in /etc/containers/registries.conf),
tls-verify should be altered on the fly.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #626
Approved by: mheon

pkg/registries/registries.go

@@ -0,0 +1,37 @@
+package registries
+
+import (
+	"os"
+
+	"github.com/containers/image/pkg/sysregistries"
+	"github.com/containers/image/types"
+	"github.com/pkg/errors"
+)
+
+// GetRegistries obtains the list of registries defined in the global registries file.
+func GetRegistries() ([]string, error) {
+	registryConfigPath := ""
+	envOverride := os.Getenv("REGISTRIES_CONFIG_PATH")
+	if len(envOverride) > 0 {
+		registryConfigPath = envOverride
+	}
+	searchRegistries, err := sysregistries.GetRegistries(&types.SystemContext{SystemRegistriesConfPath: registryConfigPath})
+	if err != nil {
+		return nil, errors.Wrapf(err, "unable to parse the registries.conf file")
+	}
+	return searchRegistries, nil
+}
+
+// GetInsecureRegistries obtains the list of inseure registries from the global registration file.
+func GetInsecureRegistries() ([]string, error) {
+	registryConfigPath := ""
+	envOverride := os.Getenv("REGISTRIES_CONFIG_PATH")
+	if len(envOverride) > 0 {
+		registryConfigPath = envOverride
+	}
+	registries, err := sysregistries.GetInsecureRegistries(&types.SystemContext{SystemRegistriesConfPath: registryConfigPath})
+	if err != nil {
+		return nil, errors.Wrapf(err, "unable to parse the registries.conf file")
+	}
+	return registries, nil
+}