Merge pull request #168 from carolynvs/split-download-locations

Support new release scheme

Author: carolynvs

Gopkg.lock

@@ -23,7 +23,7 @@
 
 [[constraint]]
   name = "github.com/Masterminds/semver"
-  version = "1.2.2"
+  branch = "2.x" 
 
 [[constraint]]
   name = "github.com/codegangsta/cli"

Gopkg.toml

@@ -30,13 +30,69 @@ func Parse(value string) Version {
 	v := Version{raw: value}
 	semver, err := semver.NewVersion(value)
 	if err == nil {
-		v.semver = semver
+		v.semver = &semver
 	} else {
 		v.alias = value
 	}
 	return v
 }
 
+func (version Version) BuildDownloadURL(mirrorURL string) (url string, archived bool) {
+	var releaseSlug, versionSlug, extSlug string
+
+	archivedReleaseCutoff, _ := semver.NewVersion("1.11.0-rc1")
+	dockerStoreCutoff, _ := semver.NewVersion("17.06.0-ce")
+
+	var edgeVersion Version
+	if version.IsExperimental() {
+		// TODO: Figure out the latest edge version
+		edgeVersion = Parse("17.06.0-ce")
+	}
+
+	// Docker Store Download
+	if version.IsExperimental() || !version.semver.LessThan(dockerStoreCutoff) {
+		archived = true
+		extSlug = archiveFileExt
+		if mirrorURL == "" {
+			mirrorURL = "download.docker.com"
+		}
+		if version.IsExperimental() {
+			releaseSlug = "edge"
+			versionSlug = edgeVersion.String()
+		} else if version.IsPrerelease() {
+			releaseSlug = "test"
+			versionSlug = version.String()
+		} else {
+			releaseSlug = "stable"
+			versionSlug = version.String()
+		}
+
+		url = fmt.Sprintf("https://%s/%s/static/%s/%s/docker-%s%s",
+			mirrorURL, mobyOS, releaseSlug, dockerArch, versionSlug, extSlug)
+		return
+	} else { // Original Download
+		archived = !version.semver.LessThan(archivedReleaseCutoff)
+		versionSlug = version.String()
+		if archived {
+			extSlug = archiveFileExt
+		} else {
+			extSlug = binaryFileExt
+		}
+		if mirrorURL == "" {
+			mirrorURL = "docker.com"
+		}
+		if version.IsPrerelease() {
+			releaseSlug = "test"
+		} else {
+			releaseSlug = "get"
+		}
+
+		url = fmt.Sprintf("https://%s.%s/builds/%s/%s/docker-%s%s",
+			releaseSlug, mirrorURL, dockerOS, dockerArch, versionSlug, extSlug)
+		return
+	}
+}
+
 func (version Version) IsPrerelease() bool {
 	if version.semver == nil {
 		return false
@@ -78,11 +134,6 @@ func (version *Version) SetAsExperimental() {
 	version.alias = ExperimentalAlias
 }
 
-func (version Version) ShouldUseArchivedRelease() bool {
-	cutoff, _ := semver.NewConstraint(">= 1.11.0-rc1")
-	return version.IsExperimental() || cutoff.Check(version.semver)
-}
-
 func (version Version) String() string {
 	if version.alias != "" && version.semver != nil {
 		return fmt.Sprintf("%s (%s)", version.alias, version.formatRaw())
@@ -129,7 +180,10 @@ func (version Version) InRange(r string) (bool, error) {
 	if err != nil {
 		return false, errors.Wrapf(err, "Unable to parse range constraint: %s", r)
 	}
-	return c.Check(version.semver), nil
+	if version.semver == nil {
+		return false, nil
+	}
+	return c.Matches(*version.semver) == nil, nil
 }
 
 // Compare compares Versions v to o:
@@ -138,7 +192,7 @@ func (version Version) InRange(r string) (bool, error) {
 // 1 == v is greater than o
 func (v Version) Compare(o Version) int {
 	if v.semver != nil && o.semver != nil {
-		return v.semver.Compare(o.semver)
+		return v.semver.Compare(*o.semver)
 	}
 
 	return strings.Compare(v.alias, o.alias)

dvm-helper/dockerversion/dockerversion.go

@@ -0,0 +1,6 @@
+// +build !windows
+
+package dockerversion
+
+const archiveFileExt string = ".tgz"
+const binaryFileExt string = ""

dvm-helper/dockerversion/dockerversion.nix.go

@@ -0,0 +1,3 @@
+package dockerversion
+
+const dockerArch string = "i386"

dvm-helper/dockerversion/dockerversion_386.go

@@ -0,0 +1,3 @@
+package dockerversion
+
+const dockerArch string = "x86_64"

dvm-helper/dockerversion/dockerversion_amd64.go

@@ -0,0 +1,4 @@
+package dockerversion
+
+const dockerOS string = "Darwin"
+const mobyOS string = "mac"

dvm-helper/dockerversion/dockerversion_darwin.go

@@ -0,0 +1,4 @@
+package dockerversion
+
+const dockerOS string = "Linux"
+const mobyOS string = "linux"

dvm-helper/dockerversion/dockerversion_linux.go

@@ -1,76 +1,72 @@
-package dockerversion_test
+package dockerversion
 
 import (
+	"fmt"
+	"net/http"
 	"testing"
 
-	"github.com/howtowhale/dvm/dvm-helper/dockerversion"
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestStripLeadingV(t *testing.T) {
-	v := dockerversion.Parse("v1.0.0")
+	v := Parse("v1.0.0")
 	assert.Equal(t, "1.0.0", v.String(), "Leading v should be stripped from the string representation")
 	assert.Equal(t, "1.0.0", v.Name(), "Leading v should be stripped from the name")
 	assert.Equal(t, "1.0.0", v.Value(), "Leading v should be stripped from the version value")
 }
 
 func TestIsPrerelease(t *testing.T) {
-	var v dockerversion.Version
+	var v Version
 
-	v = dockerversion.Parse("17.3.0-ce-rc1")
+	v = Parse("17.3.0-ce-rc1")
 	assert.True(t, v.IsPrerelease(), "%s should be a prerelease", v)
 
-	v = dockerversion.Parse("1.12.4-rc1")
+	v = Parse("1.12.4-rc1")
 	assert.True(t, v.IsPrerelease(), "%s should be a prerelease", v)
 
-	v = dockerversion.Parse("1.12.4-beta.1")
+	v = Parse("1.12.4-beta.1")
 	assert.True(t, v.IsPrerelease(), "%s should be a prerelease", v)
 
-	v = dockerversion.Parse("1.12.4-alpha-2")
+	v = Parse("1.12.4-alpha-2")
 	assert.True(t, v.IsPrerelease(), "%s should be a prerelease", v)
 
-	v = dockerversion.Parse("17.3.0-ce")
+	v = Parse("17.3.0-ce")
 	assert.False(t, v.IsPrerelease(), "%s should NOT be a prerelease", v)
 }
 
-func TestPrereleaseUsesArchivedReleases(t *testing.T) {
-	v := dockerversion.Parse("v1.12.5-rc1")
-
-	assert.True(t, v.ShouldUseArchivedRelease())
-}
-
 func TestLeadingZeroInVersion(t *testing.T) {
-	v := dockerversion.Parse("v17.03.0-ce")
+	v := Parse("v17.03.0-ce")
 
 	assert.Equal(t, "17.03.0-ce", v.String(), "Leading zeroes in the version should be preserved")
 }
 
 func TestSystemAlias(t *testing.T) {
-	v := dockerversion.Parse(dockerversion.SystemAlias)
+	v := Parse(SystemAlias)
 	assert.Empty(t, v.Slug(),
 		"The system alias should not have a slug")
-	assert.Equal(t, dockerversion.SystemAlias, v.String(),
+	assert.Equal(t, SystemAlias, v.String(),
 		"An empty alias should only print the alias")
-	assert.Equal(t, dockerversion.SystemAlias, v.Name(),
+	assert.Equal(t, SystemAlias, v.Name(),
 		"The name for an aliased version should be its alias")
 	assert.Equal(t, "", v.Value(),
 		"The value for an empty aliased version should be empty")
 }
 
 func TestExperimentalAlias(t *testing.T) {
-	v := dockerversion.Parse(dockerversion.ExperimentalAlias)
-	assert.Equal(t, dockerversion.ExperimentalAlias, v.Slug(),
+	v := Parse(ExperimentalAlias)
+	assert.Equal(t, ExperimentalAlias, v.Slug(),
 		"The slug for the experimental version should be 'experimental'")
-	assert.Equal(t, dockerversion.ExperimentalAlias, v.String(),
+	assert.Equal(t, ExperimentalAlias, v.String(),
 		"An empty alias should only print the alias")
-	assert.Equal(t, dockerversion.ExperimentalAlias, v.Name(),
+	assert.Equal(t, ExperimentalAlias, v.Name(),
 		"The name for an aliased version should be its alias")
 	assert.Equal(t, "", v.Value(),
 		"The value for an empty aliased version should be empty")
 }
 
 func TestAlias(t *testing.T) {
-	v := dockerversion.NewAlias("prod", "1.2.3")
+	v := NewAlias("prod", "1.2.3")
 	assert.Equal(t, "1.2.3", v.Slug(),
 		"The slug for an aliased version should be its semver value")
 	assert.Equal(t, "prod (1.2.3)", v.String(),
@@ -82,7 +78,7 @@ func TestAlias(t *testing.T) {
 }
 
 func TestSemanticVersion(t *testing.T) {
-	v := dockerversion.Parse("1.2.3")
+	v := Parse("1.2.3")
 	assert.Equal(t, "1.2.3", v.Slug(),
 		"The slug for a a semantic version should be its semver value")
 	assert.Equal(t, "1.2.3", v.String(),
@@ -94,13 +90,65 @@ func TestSemanticVersion(t *testing.T) {
 }
 
 func TestSetAsExperimental(t *testing.T) {
-	v := dockerversion.Parse("1.2.3")
+	v := Parse("1.2.3")
 	v.SetAsExperimental()
 	assert.True(t, v.IsExperimental())
 }
 
 func TestSetAsSystem(t *testing.T) {
-	v := dockerversion.Parse("1.2.3")
+	v := Parse("1.2.3")
 	v.SetAsSystem()
 	assert.True(t, v.IsSystem())
-}
+}
+
+func TestVersion_BuildDownloadURL(t *testing.T) {
+	testcases := map[Version]struct {
+		wantURL      string
+		wantArchived bool
+	}{
+		// original download location, without compression
+		Parse("1.10.3"): {fmt.Sprintf("https://get.docker.com/builds/%s/%s/docker-1.10.3", dockerOS, dockerArch), false},
+
+		// original download location, without compression, prerelease
+		Parse("1.10.0-rc1"): {fmt.Sprintf("https://test.docker.com/builds/%s/%s/docker-1.10.0-rc1", dockerOS, dockerArch), false},
+
+		// compressed binaries
+		Parse("1.11.0-rc1"): {fmt.Sprintf("https://test.docker.com/builds/%s/%s/docker-1.11.0-rc1.tgz", dockerOS, dockerArch), true},
+
+		// original version scheme, prerelease binaries
+		Parse("1.13.0-rc1"): {fmt.Sprintf("https://test.docker.com/builds/%s/%s/docker-1.13.0-rc1.tgz", dockerOS, dockerArch), true},
+
+		// yearly notation, original download location, release location
+		Parse("17.03.0-ce"): {fmt.Sprintf("https://get.docker.com/builds/%s/%s/docker-17.03.0-ce%s", dockerOS, dockerArch, archiveFileExt), true},
+
+		// docker store download
+		Parse("17.06.0-ce"): {fmt.Sprintf("https://download.docker.com/%s/static/stable/%s/docker-17.06.0-ce.tgz", mobyOS, dockerArch), true},
+
+		// docker store download, prerelease
+		Parse("17.07.0-ce-rc1"): {fmt.Sprintf("https://download.docker.com/%s/static/test/%s/docker-17.07.0-ce-rc1.tgz", mobyOS, dockerArch), true},
+
+		// latest edge/experimental
+		Parse("experimental"): {fmt.Sprintf("https://download.docker.com/%s/static/edge/%s/docker-17.06.0-ce.tgz", mobyOS, dockerArch), true},
+	}
+
+	for version, testcase := range testcases {
+		t.Run(version.String(), func(t *testing.T) {
+			gotURL, gotArchived := version.BuildDownloadURL("")
+			if testcase.wantURL != gotURL {
+				t.Fatalf("Expected %s to be downloaded from '%s', but got '%s'", version, testcase.wantURL, gotURL)
+			}
+			if testcase.wantArchived != gotArchived {
+				t.Fatalf("Expected %s to use an archived download strategy", version)
+			}
+
+			response, err := http.DefaultClient.Head(gotURL)
+			if err != nil {
+				t.Fatalf("%#v", errors.Wrapf(err, "Unable to download release from %s", gotURL))
+			}
+
+			if response.StatusCode != 200 {
+				t.Fatalf("Unexpected status code (%d) when downloading %s", response.StatusCode, gotURL)
+			}
+		})
+	}
+}

dvm-helper/dockerversion/dockerversion_test.go

@@ -0,0 +1,6 @@
+package dockerversion
+
+const dockerOS string = "Windows"
+const mobyOS string = "win"
+const archiveFileExt string = ".zip"
+const binaryFileExt string = ".exe"