grim/convey

Add a utility function to parse an image name into the registry, name, and tag

2017-07-22, Gary Kramlich
c47dd1f8ad1d
Parents b7ba6b711cfa
Children f25d35ba9313
Add a utility function to parse an image name into the registry, name, and tag
2 files changed, 119 insertions(+), 0 deletions(-)
  • +44 -0
    docker/util.go
  • +75 -0
    docker/util_test.go
    • --- /dev/null Thu Jan 01 00:00:00 1970 +0000
    +++ b/docker/util.go Sat Jul 22 13:29:17 2017 -0500
    @@ -0,0 +1,44 @@
    +/*
    + * Convey
    + * Copyright 2016-2017 Gary Kramlich <grim@reaperworld.com>
    + *
    + * This program is free software: you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation, either version 3 of the License, or
    + * (at your option) any later version.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +package docker
    +
    +import (
    + "strings"
    +)
    +
    +// ParseImage will convert an image like python:3 to it's registry, name, and tag
    +func ParseImage(image string) (string, string, string) {
    + registry := ""
    + name := ""
    + tag := ""
    +
    + parts := strings.SplitN(image, "/", 2)
    + if len(parts) == 2 {
    + registry = parts[0]
    + image = parts[1]
    + }
    +
    + parts = strings.SplitN(image, ":", 2)
    +
    + name = parts[0]
    + if len(parts) > 1 {
    + tag = parts[1]
    + }
    +
    + return registry, name, tag
    +}
    --- /dev/null Thu Jan 01 00:00:00 1970 +0000
    +++ b/docker/util_test.go Sat Jul 22 13:29:17 2017 -0500
    @@ -0,0 +1,75 @@
    +/*
    + * Convey
    + * Copyright 2016-2017 Gary Kramlich <grim@reaperworld.com>
    + *
    + * This program is free software: you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation, either version 3 of the License, or
    + * (at your option) any later version.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +package docker
    +
    +import (
    + "testing"
    +
    + . "github.com/onsi/gomega"
    +)
    +
    +type parseImageData struct {
    + input string
    + registry string
    + name string
    + tag string
    +}
    +
    +func (s *dockerSuite) TestParseImage(t *testing.T) {
    + data := []parseImageData{
    + {
    + input: "",
    + registry: "",
    + name: "",
    + tag: "",
    + }, {
    + input: "python",
    + registry: "",
    + name: "python",
    + tag: "",
    + }, {
    + input: "python:3",
    + registry: "",
    + name: "python",
    + tag: "3",
    + }, {
    + input: "registry.docker.io/python:3",
    + registry: "registry.docker.io",
    + name: "python",
    + tag: "3",
    + }, {
    + input: "registry.docker.io/rw_grim/convey:latest",
    + registry: "registry.docker.io",
    + name: "rw_grim/convey",
    + tag: "latest",
    + }, {
    + input: "registry.my.tld:5000/something/fancy:commit:deadbeef",
    + registry: "registry.my.tld:5000",
    + name: "something/fancy",
    + tag: "commit:deadbeef",
    + },
    + }
    +
    + for _, test := range data {
    + registry, name, tag := ParseImage(test.input)
    +
    + Expect(registry).To(Equal(test.registry))
    + Expect(name).To(Equal(test.name))
    + Expect(tag).To(Equal(test.tag))
    + }
    +}