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gps: fine grained source transitions #1250

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Feb 24, 2018
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gps: fine grained source transitions #1250

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b9a79ad
gps: vcs: fine grained source transitions
jmank88 Oct 8, 2017
98031fc
gps: source: ping upstream when no local state exists
jmank88 Feb 22, 2018
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3 changes: 3 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,9 @@ BUG FIXES:

IMPROVEMENTS:

* Reduce network access by trusting local source information and only pulling
from upstream when necessary ([#1250](https://github.com/golang/dep/pull/1250)).

# v0.4.1

BUG FIXES:
Expand Down
50 changes: 25 additions & 25 deletions gps/deduce.go
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Expand Up @@ -16,7 +16,7 @@ import (
"strings"
"sync"

radix "github.com/armon/go-radix"
"github.com/armon/go-radix"
"github.com/pkg/errors"
)

Expand Down Expand Up @@ -104,7 +104,7 @@ type pathDeducer interface {
// So the return of the above string would be
// "github.com/some-user/some-package"
deduceRoot(string) (string, error)
deduceSource(string, *url.URL) (maybeSource, error)
deduceSource(string, *url.URL) (maybeSources, error)
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Using concrete maybeSources everywhere was more significant in a previous iteration, but is still an overall simplifying change - barring some test boilerplate.

}

type githubDeducer struct {
Expand All @@ -120,7 +120,7 @@ func (m githubDeducer) deduceRoot(path string) (string, error) {
return "github.com" + v[2], nil
}

func (m githubDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m githubDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s is not a valid path for a source on github.com", path)
Expand All @@ -138,7 +138,7 @@ func (m githubDeducer) deduceSource(path string, u *url.URL) (maybeSource, error
if u.Scheme == "ssh" {
u.User = url.User("git")
}
return maybeGitSource{url: u}, nil
return maybeSources{maybeGitSource{url: u}}, nil
}

mb := make(maybeSources, len(gitSchemes))
Expand Down Expand Up @@ -167,7 +167,7 @@ func (m bitbucketDeducer) deduceRoot(path string) (string, error) {
return "bitbucket.org" + v[2], nil
}

func (m bitbucketDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m bitbucketDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s is not a valid path for a source on bitbucket.org", path)
Expand All @@ -189,12 +189,12 @@ func (m bitbucketDeducer) deduceSource(path string, u *url.URL) (maybeSource, er
// superset of the hg schemes
return nil, fmt.Errorf("%s is not a valid scheme for accessing a git repository", u.Scheme)
}
return maybeGitSource{url: u}, nil
return maybeSources{maybeGitSource{url: u}}, nil
} else if ishg {
if !validhg {
return nil, fmt.Errorf("%s is not a valid scheme for accessing an hg repository", u.Scheme)
}
return maybeHgSource{url: u}, nil
return maybeSources{maybeHgSource{url: u}}, nil
} else if !validgit && !validhg {
return nil, fmt.Errorf("%s is not a valid scheme for accessing either a git or hg repository", u.Scheme)
}
Expand Down Expand Up @@ -265,7 +265,7 @@ func (m gopkginDeducer) parseAndValidatePath(p string) ([]string, error) {
return v, nil
}

func (m gopkginDeducer) deduceSource(p string, u *url.URL) (maybeSource, error) {
func (m gopkginDeducer) deduceSource(p string, u *url.URL) (maybeSources, error) {
// Reuse root detection logic for initial validation
v, err := m.parseAndValidatePath(p)
if err != nil {
Expand Down Expand Up @@ -329,7 +329,7 @@ func (m launchpadDeducer) deduceRoot(path string) (string, error) {
return "launchpad.net" + v[2], nil
}

func (m launchpadDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m launchpadDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s is not a valid path for a source on launchpad.net", path)
Expand All @@ -342,7 +342,7 @@ func (m launchpadDeducer) deduceSource(path string, u *url.URL) (maybeSource, er
if !validateVCSScheme(u.Scheme, "bzr") {
return nil, fmt.Errorf("%s is not a valid scheme for accessing a bzr repository", u.Scheme)
}
return maybeBzrSource{url: u}, nil
return maybeSources{maybeBzrSource{url: u}}, nil
}

mb := make(maybeSources, len(bzrSchemes))
Expand All @@ -369,7 +369,7 @@ func (m launchpadGitDeducer) deduceRoot(path string) (string, error) {
return "git.launchpad.net" + v[2], nil
}

func (m launchpadGitDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m launchpadGitDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s is not a valid path for a source on git.launchpad.net", path)
Expand All @@ -382,7 +382,7 @@ func (m launchpadGitDeducer) deduceSource(path string, u *url.URL) (maybeSource,
if !validateVCSScheme(u.Scheme, "git") {
return nil, fmt.Errorf("%s is not a valid scheme for accessing a git repository", u.Scheme)
}
return maybeGitSource{url: u}, nil
return maybeSources{maybeGitSource{url: u}}, nil
}

mb := make(maybeSources, len(gitSchemes))
Expand All @@ -408,7 +408,7 @@ func (m jazzDeducer) deduceRoot(path string) (string, error) {
return "hub.jazz.net" + v[2], nil
}

func (m jazzDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m jazzDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s is not a valid path for a source on hub.jazz.net", path)
Expand All @@ -422,7 +422,7 @@ func (m jazzDeducer) deduceSource(path string, u *url.URL) (maybeSource, error)
u.Scheme = "https"
fallthrough
case "https":
return maybeGitSource{url: u}, nil
return maybeSources{maybeGitSource{url: u}}, nil
default:
return nil, fmt.Errorf("IBM's jazz hub only supports https, %s is not allowed", u.String())
}
Expand All @@ -441,7 +441,7 @@ func (m apacheDeducer) deduceRoot(path string) (string, error) {
return "git.apache.org" + v[2], nil
}

func (m apacheDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m apacheDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s is not a valid path for a source on git.apache.org", path)
Expand All @@ -454,7 +454,7 @@ func (m apacheDeducer) deduceSource(path string, u *url.URL) (maybeSource, error
if !validateVCSScheme(u.Scheme, "git") {
return nil, fmt.Errorf("%s is not a valid scheme for accessing a git repository", u.Scheme)
}
return maybeGitSource{url: u}, nil
return maybeSources{maybeGitSource{url: u}}, nil
}

mb := make(maybeSources, len(gitSchemes))
Expand All @@ -480,7 +480,7 @@ func (m vcsExtensionDeducer) deduceRoot(path string) (string, error) {
return v[1], nil
}

func (m vcsExtensionDeducer) deduceSource(path string, u *url.URL) (maybeSource, error) {
func (m vcsExtensionDeducer) deduceSource(path string, u *url.URL) (maybeSources, error) {
v := m.regexp.FindStringSubmatch(path)
if v == nil {
return nil, fmt.Errorf("%s contains no vcs extension hints for matching", path)
Expand All @@ -500,11 +500,11 @@ func (m vcsExtensionDeducer) deduceSource(path string, u *url.URL) (maybeSource,

switch v[4] {
case "git":
return maybeGitSource{url: u}, nil
return maybeSources{maybeGitSource{url: u}}, nil
case "bzr":
return maybeBzrSource{url: u}, nil
return maybeSources{maybeBzrSource{url: u}}, nil
case "hg":
return maybeHgSource{url: u}, nil
return maybeSources{maybeHgSource{url: u}}, nil
}
}

Expand Down Expand Up @@ -590,7 +590,7 @@ func (dc *deductionCoordinator) deduceRootPath(ctx context.Context, path string)
dc.mut.RUnlock()
if has && isPathPrefixOrEqual(prefix, path) {
switch d := data.(type) {
case maybeSource:
case maybeSources:
return pathDeduction{root: prefix, mb: d}, nil
case *httpMetadataDeducer:
// Multiple calls have come in for a similar path shape during
Expand Down Expand Up @@ -652,7 +652,7 @@ func (dc *deductionCoordinator) deduceRootPath(ctx context.Context, path string)
// the source.
type pathDeduction struct {
root string
mb maybeSource
mb maybeSources
}

var errNoKnownPathMatch = errors.New("no known path match")
Expand Down Expand Up @@ -759,11 +759,11 @@ func (hmd *httpMetadataDeducer) deduce(ctx context.Context, path string) (pathDe

switch vcs {
case "git":
pd.mb = maybeGitSource{url: repoURL}
pd.mb = maybeSources{maybeGitSource{url: repoURL}}
case "bzr":
pd.mb = maybeBzrSource{url: repoURL}
pd.mb = maybeSources{maybeBzrSource{url: repoURL}}
case "hg":
pd.mb = maybeHgSource{url: repoURL}
pd.mb = maybeSources{maybeHgSource{url: repoURL}}
default:
hmd.deduceErr = errors.Errorf("unsupported vcs type %s in go-get metadata from %s", vcs, path)
return
Expand Down
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