dep

README

Dep

dep is a prototype dependency management tool for Go. It requires Go 1.8 or newer to compile. dep is safe for production use.

dep is the official experiment, but not yet the official tool. Check out the Roadmap for more on what this means!

For guides and reference materials about dep, see the documentation.

Installation

It is strongly recommended that you use a released version. Release binaries are available on the releases page.

On MacOS you can install or upgrade to the latest released version with Homebrew:

$ brew install dep
$ brew upgrade dep

If you're interested in hacking on dep, you can install via go get:

go get -u github.com/golang/dep/cmd/dep

Feedback

Feedback is greatly appreciated. At this stage, the maintainers are most interested in feedback centered on the user experience (UX) of the tool. Do you have workflows that the tool supports well, or doesn't support at all? Do any of the commands have surprising effects, output, or results? If not, please file an issue, describing what you did or wanted to do, what you expected to happen, and what actually happened.

Contributing

Contributions are greatly appreciated. The maintainers actively manage the issues list, and try to highlight issues suitable for newcomers. The project follows the typical GitHub pull request model. See CONTRIBUTING.md for more details. Before starting any work, please either comment on an existing issue, or file a new one.

Documentation

Overview

Package dep is a prototype dependency management library.

Index

• Constants
• func BackupVendor(vpath, suffix string) (string, error)
• func ValidateProjectRoots(c *Ctx, m *Manifest, sm gps.SourceManager) error
• type Analyzer
  • func (a Analyzer) DeriveManifestAndLock(path string, n gps.ProjectRoot) (gps.Manifest, gps.Lock, error)
  • func (a Analyzer) HasDepMetadata(path string) bool
  • func (a Analyzer) Info() gps.ProjectAnalyzerInfo
• type Ctx
  • func (c *Ctx) AbsForImport(path string) (string, error)
  • func (c *Ctx) DetectProjectGOPATH(p *Project) (string, error)
  • func (c *Ctx) ImportForAbs(path string) (string, error)
  • func (c *Ctx) LoadProject() (*Project, error)
  • func (c *Ctx) SetPaths(wd string, GOPATHs ...string) error
  • func (c *Ctx) SourceManager() (*gps.SourceMgr, error)
  • func (c *Ctx) ValidateParams(sm gps.SourceManager, params gps.SolveParameters) error
• type Lock
  • func LockFromSolution(in gps.Solution) *Lock
  • func (l *Lock) HasProjectWithRoot(root gps.ProjectRoot) bool
  • func (l *Lock) InputsDigest() []byte
  • func (l *Lock) MarshalTOML() ([]byte, error)
  • func (l *Lock) Projects() []gps.LockedProject
• type Manifest
  • func NewManifest() *Manifest
  • func (m *Manifest) DependencyConstraints() gps.ProjectConstraints
  • func (m *Manifest) HasConstraintsOn(root gps.ProjectRoot) bool
  • func (m *Manifest) IgnoredPackages() *pkgtree.IgnoredRuleset
  • func (m *Manifest) MarshalTOML() ([]byte, error)
  • func (m *Manifest) Overrides() gps.ProjectConstraints
  • func (m *Manifest) RequiredPackages() map[string]bool
• type Project
  • func (p *Project) FindIneffectualConstraints(sm gps.SourceManager) []gps.ProjectRoot
  • func (p *Project) GetDirectDependencyNames(sm gps.SourceManager) (pkgtree.PackageTree, map[gps.ProjectRoot]bool, error)
  • func (p *Project) MakeParams() gps.SolveParameters
  • func (p *Project) ParseRootPackageTree() (pkgtree.PackageTree, error)
  • func (p *Project) SetRoot(root string) error
• type SafeWriter
  • func NewSafeWriter(manifest *Manifest, oldLock, newLock *Lock, vendor VendorBehavior, ...) (*SafeWriter, error)
  • func (sw *SafeWriter) HasLock() bool
  • func (sw *SafeWriter) HasManifest() bool
  • func (sw *SafeWriter) PrintPreparedActions(output *log.Logger, verbose bool) error
  • func (sw *SafeWriter) Write(root string, sm gps.SourceManager, examples bool, logger *log.Logger) error
• type SolveMeta
• type VendorBehavior

Constants

const LockName = "Gopkg.lock"

LockName is the lock file name used by dep.

const ManifestName = "Gopkg.toml"

ManifestName is the manifest file name used by dep.

Functions

func BackupVendor

func BackupVendor(vpath, suffix string) (string, error)

BackupVendor looks for existing vendor directory and if it's not empty, creates a backup of it to a new directory with the provided suffix.

func ValidateProjectRoots

func ValidateProjectRoots(c *Ctx, m *Manifest, sm gps.SourceManager) error

ValidateProjectRoots validates the project roots present in manifest.

Types

type Analyzer

type Analyzer struct{}

Analyzer implements gps.ProjectAnalyzer.

func (Analyzer) DeriveManifestAndLock

func (a Analyzer) DeriveManifestAndLock(path string, n gps.ProjectRoot) (gps.Manifest, gps.Lock, error)

DeriveManifestAndLock reads and returns the manifest at path/ManifestName or nil if one is not found. The Lock is always nil for now.

func (Analyzer) HasDepMetadata

func (a Analyzer) HasDepMetadata(path string) bool

HasDepMetadata determines if a dep manifest exists at the specified path.

func (Analyzer) Info

func (a Analyzer) Info() gps.ProjectAnalyzerInfo

Info returns Analyzer's name and version info.

type Ctx

type Ctx struct {
	WorkingDir     string      // Where to execute.
	GOPATH         string      // Selected Go path, containing WorkingDir.
	GOPATHs        []string    // Other Go paths.
	Out, Err       *log.Logger // Required loggers.
	Verbose        bool        // Enables more verbose logging.
	DisableLocking bool        // When set, no lock file will be created to protect against simultaneous dep processes.
	Cachedir       string      // Cache directory loaded from environment.
}

Ctx defines the supporting context of dep.

A properly initialized Ctx has a GOPATH containing the project root and non-nil Loggers.

ctx := &dep.Ctx{
	WorkingDir: GOPATH + "/src/project/root",
	GOPATH: GOPATH,
	Out: log.New(os.Stdout, "", 0),
	Err: log.New(os.Stderr, "", 0),
}

Ctx.DetectProjectGOPATH() helps with setting the containing GOPATH.

ctx.GOPATH, err := Ctx.DetectProjectGOPATH(project)
if err != nil {
	// Could not determine which GOPATH to use for the project.
}

func (*Ctx) AbsForImport

func (c *Ctx) AbsForImport(path string) (string, error)

AbsForImport returns the absolute path for the project root including the $GOPATH. This will not work with stdlib packages and the package directory needs to exist.

func (*Ctx) DetectProjectGOPATH

func (c *Ctx) DetectProjectGOPATH(p *Project) (string, error)

DetectProjectGOPATH attempt to find the GOPATH containing the project.

If p.AbsRoot is not a symlink and is within a GOPATH, the GOPATH containing p.AbsRoot is returned.
If p.AbsRoot is a symlink and is not within any known GOPATH, the GOPATH containing p.ResolvedAbsRoot is returned.

p.AbsRoot is assumed to be a symlink if it is not the same as p.ResolvedAbsRoot.

DetectProjectGOPATH will return an error in the following cases:

If p.AbsRoot is not a symlink and is not within any known GOPATH.
If neither p.AbsRoot nor p.ResolvedAbsRoot are within a known GOPATH.
If both p.AbsRoot and p.ResolvedAbsRoot are within the same GOPATH.
If p.AbsRoot and p.ResolvedAbsRoot are each within a different GOPATH.

func (*Ctx) ImportForAbs

func (c *Ctx) ImportForAbs(path string) (string, error)

ImportForAbs returns the import path for an absolute project path by trimming the `$GOPATH/src/` prefix. Returns an error for paths equal to, or without this prefix.

func (*Ctx) LoadProject

func (c *Ctx) LoadProject() (*Project, error)

LoadProject starts from the current working directory and searches up the directory tree for a project root. The search stops when a file with the name ManifestName (Gopkg.toml, by default) is located.

The Project contains the parsed manifest as well as a parsed lock file, if present. The import path is calculated as the remaining path segment below Ctx.GOPATH/src.

func (*Ctx) SetPaths

func (c *Ctx) SetPaths(wd string, GOPATHs ...string) error

SetPaths sets the WorkingDir and GOPATHs fields. If GOPATHs is empty, then the GOPATH environment variable (or the default GOPATH) is used instead.

func (*Ctx) SourceManager

func (c *Ctx) SourceManager() (*gps.SourceMgr, error)

SourceManager produces an instance of gps's built-in SourceManager initialized to log to the receiver's logger.

func (*Ctx) ValidateParams

func (c *Ctx) ValidateParams(sm gps.SourceManager, params gps.SolveParameters) error

ValidateParams ensure that solving can be completed with the specified params.

type Lock

type Lock struct {
	SolveMeta SolveMeta
	P         []gps.LockedProject
}

Lock holds lock file data and implements gps.Lock.

func LockFromSolution

func LockFromSolution(in gps.Solution) *Lock

LockFromSolution converts a gps.Solution to dep's representation of a lock.

Data is defensively copied wherever necessary to ensure the resulting *lock shares no memory with the original lock.

func (*Lock) HasProjectWithRoot

func (l *Lock) HasProjectWithRoot(root gps.ProjectRoot) bool

HasProjectWithRoot checks if the lock contains a project with the provided ProjectRoot.

This check is O(n) in the number of projects.

func (*Lock) InputsDigest

func (l *Lock) InputsDigest() []byte

InputsDigest returns the hash of inputs which produced this lock data.

func (*Lock) MarshalTOML

func (l *Lock) MarshalTOML() ([]byte, error)

MarshalTOML serializes this lock into TOML via an intermediate raw form.

func (*Lock) Projects

func (l *Lock) Projects() []gps.LockedProject

Projects returns the list of LockedProjects contained in the lock data.

type Manifest

type Manifest struct {
	Constraints gps.ProjectConstraints
	Ovr         gps.ProjectConstraints

	Ignored  []string
	Required []string

	PruneOptions gps.CascadingPruneOptions
}

Manifest holds manifest file data and implements gps.RootManifest.

func NewManifest

func NewManifest() *Manifest

NewManifest instantites a new manifest.

func (*Manifest) DependencyConstraints

func (m *Manifest) DependencyConstraints() gps.ProjectConstraints

DependencyConstraints returns a list of project-level constraints.

func (*Manifest) HasConstraintsOn

func (m *Manifest) HasConstraintsOn(root gps.ProjectRoot) bool

HasConstraintsOn checks if the manifest contains either constraints or overrides on the provided ProjectRoot.

func (*Manifest) IgnoredPackages

func (m *Manifest) IgnoredPackages() *pkgtree.IgnoredRuleset

IgnoredPackages returns a set of import paths to ignore.

func (*Manifest) MarshalTOML

func (m *Manifest) MarshalTOML() ([]byte, error)

MarshalTOML serializes this manifest into TOML via an intermediate raw form.

func (*Manifest) Overrides

func (m *Manifest) Overrides() gps.ProjectConstraints

Overrides returns a list of project-level override constraints.

func (*Manifest) RequiredPackages

func (m *Manifest) RequiredPackages() map[string]bool

RequiredPackages returns a set of import paths to require.

type Project

type Project struct {
	// AbsRoot is the absolute path to the root directory of the project.
	AbsRoot string
	// ResolvedAbsRoot is the resolved absolute path to the root directory of the project.
	// If AbsRoot is not a symlink, then ResolvedAbsRoot should equal AbsRoot.
	ResolvedAbsRoot string
	// ImportRoot is the import path of the project's root directory.
	ImportRoot      gps.ProjectRoot
	Manifest        *Manifest
	Lock            *Lock // Optional
	RootPackageTree pkgtree.PackageTree
}

A Project holds a Manifest and optional Lock for a project.

func (*Project) FindIneffectualConstraints

func (p *Project) FindIneffectualConstraints(sm gps.SourceManager) []gps.ProjectRoot

FindIneffectualConstraints looks for constraint rules expressed in the manifest that will have no effect during solving, as they are specified for projects that are not direct dependencies of the Project.

"Direct dependency" here is as implemented by GetDirectDependencyNames(); it correctly incorporates all "ignored" and "required" rules.

func (*Project) GetDirectDependencyNames

func (p *Project) GetDirectDependencyNames(sm gps.SourceManager) (pkgtree.PackageTree, map[gps.ProjectRoot]bool, error)

GetDirectDependencyNames returns the set of unique Project Roots that are the direct dependencies of this Project.

A project is considered a direct dependency if at least one of packages in it is named in either this Project's required list, or if there is at least one non-ignored import statement from a non-ignored package in the current project's package tree.

The returned map of Project Roots contains only boolean true values; this makes a "false" value always indicate an absent key, which makes conditional checks against the map more ergonomic.

This function will correctly utilize ignores and requireds from an existing manifest, if one is present, but will also do the right thing without a manifest.

func (*Project) MakeParams

func (p *Project) MakeParams() gps.SolveParameters

MakeParams is a simple helper to create a gps.SolveParameters without setting any nils incorrectly.

func (*Project) ParseRootPackageTree

func (p *Project) ParseRootPackageTree() (pkgtree.PackageTree, error)

ParseRootPackageTree analyzes the root project's disk contents to create a PackageTree, trimming out packages that are not relevant for root projects along the way.

The resulting tree is cached internally at p.RootPackageTree.

func (*Project) SetRoot

func (p *Project) SetRoot(root string) error

SetRoot sets the project AbsRoot and ResolvedAbsRoot. If root is not a symlink, ResolvedAbsRoot will be set to root.

type SafeWriter

type SafeWriter struct {
	Manifest *Manifest
	// contains filtered or unexported fields
}

SafeWriter transactionalizes writes of manifest, lock, and vendor dir, both individually and in any combination, into a pseudo-atomic action with transactional rollback.

It is not impervious to errors (writing to disk is hard), but it should guard against non-arcane failure conditions.

func NewSafeWriter

func NewSafeWriter(manifest *Manifest, oldLock, newLock *Lock, vendor VendorBehavior, prune gps.CascadingPruneOptions) (*SafeWriter, error)

NewSafeWriter sets up a SafeWriter to write a set of manifest, lock, and vendor tree.

- If manifest is provided, it will be written to the standard manifest file name beneath root.

- If newLock is provided, it will be written to the standard lock file name beneath root.

- If vendor is VendorAlways, or is VendorOnChanged and the locks are different, the vendor directory will be written beneath root based on newLock.

- If oldLock is provided without newLock, error.

- If vendor is VendorAlways without a newLock, error.

func (*SafeWriter) HasLock

func (sw *SafeWriter) HasLock() bool

HasLock checks if a Lock is present in the SafeWriter

func (*SafeWriter) HasManifest

func (sw *SafeWriter) HasManifest() bool

HasManifest checks if a Manifest is present in the SafeWriter

func (*SafeWriter) PrintPreparedActions

func (sw *SafeWriter) PrintPreparedActions(output *log.Logger, verbose bool) error

PrintPreparedActions logs the actions a call to Write would perform.

func (*SafeWriter) Write

func (sw *SafeWriter) Write(root string, sm gps.SourceManager, examples bool, logger *log.Logger) error

Write saves some combination of config yaml, lock, and a vendor tree. root is the absolute path of root dir in which to write. sm is only required if vendor is being written.

It first writes to a temp dir, then moves them in place if and only if all the write operations succeeded. It also does its best to roll back if any moves fail. This mostly guarantees that dep cannot exit with a partial write that would leave an undefined state on disk.

type SolveMeta

type SolveMeta struct {
	InputsDigest    []byte
	AnalyzerName    string
	AnalyzerVersion int
	SolverName      string
	SolverVersion   int
}

SolveMeta holds solver meta data.

type VendorBehavior

type VendorBehavior int

VendorBehavior defines when the vendor directory should be written.

const (
	// VendorOnChanged indicates that the vendor directory should be written when the lock is new or changed.
	VendorOnChanged VendorBehavior = iota
	// VendorAlways forces the vendor directory to always be written.
	VendorAlways
	// VendorNever indicates the vendor directory should never be written.
	VendorNever
)