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docker.go
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docker.go
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package main
import (
"strings"
semver "github.com/Masterminds/semver/v3"
"github.com/magefile/mage/sh"
"github.com/pkg/errors"
)
const (
DOCKER_VERSION_CONSTRAINT = ">= 20.10.10"
DOCKER_COMPOSE_VERSION_CONSTRAINT = ">= 1.29.2"
DOCKER_BUILDX_VERSION_CONSTRAINT = ">= 0.6.3"
)
func dockerBinary() string {
return binaryWithExt("docker")
}
func dockerOutput(args ...string) (string, error) {
return sh.Output(dockerBinary(), args...)
}
func dockerRun(args ...string) error {
return sh.Run(dockerBinary(), args...)
}
func dockerBuildxVersion() (*semver.Version, error) {
output, err := dockerOutput("buildx", "version")
if err != nil {
return nil, errors.Errorf("error running version cmd: %v", err)
}
fields := strings.Fields(string(output))
if len(fields) < 3 {
return nil, errors.Errorf("unexpected version cmd output: %s", output)
}
version, err := semver.NewVersion(fields[1])
if err != nil {
return nil, errors.Errorf("error parsing version: %v", err)
}
return version, nil
}
func dockerComposeVersion() (*semver.Version, error) {
output, err := dockerOutput("compose", "version")
if err != nil {
return nil, errors.Errorf("error running version cmd: %v", err)
}
fields := strings.Fields(string(output))
if len(fields) < 3 {
return nil, errors.Errorf("unexpected version cmd output: %s", output)
}
version, err := semver.NewVersion(fields[3])
if err != nil {
return nil, errors.Errorf("error parsing version: %v", err)
}
return version, nil
}
func dockerVersion() (*semver.Version, error) {
output, err := dockerOutput("--version")
if err != nil {
return nil, errors.Errorf("error running version cmd: %v", err)
}
fields := strings.Fields(string(output))
if len(fields) < 3 {
return nil, errors.Errorf("unexpected version cmd output: %s", output)
}
version, err := semver.NewVersion(strings.Trim(fields[2], ","))
if err != nil {
return nil, errors.Errorf("error parsing version: %v", err)
}
return version, nil
}
func constraintCheck(version *semver.Version, versionRequirement string, dependencyName string) error {
constraint, err := semver.NewConstraint(versionRequirement)
if err != nil {
return errors.Errorf("error parsing constraint: %v", err)
}
if !constraint.Check(version) {
return errors.Errorf("found %s version %v but it failed constraint %v", dependencyName, version, constraint)
}
return nil
}
func dockerComposeCheck() error {
version, err := dockerComposeVersion()
if err != nil {
return errors.Errorf("error getting version: %v", err)
}
return constraintCheck(version, DOCKER_COMPOSE_VERSION_CONSTRAINT, "docker-compose")
}
func dockerBuildxCheck() error {
version, err := dockerBuildxVersion()
if err != nil {
return errors.Errorf("error getting version: %v", err)
}
return constraintCheck(version, DOCKER_BUILDX_VERSION_CONSTRAINT, "docker-buildx")
}
func dockerCheck() error {
version, err := dockerVersion()
if err != nil {
return errors.Errorf("error getting version: %v", err)
}
constraint, err := semver.NewConstraint(DOCKER_VERSION_CONSTRAINT)
if err != nil {
return errors.Errorf("error parsing constraint: %v", err)
}
if !constraint.Check(version) {
return errors.Errorf("found docker version %v but it failed constraint %v", version, constraint)
}
return nil
}