codehost

Documentation

Overview

Package codehost defines the interface implemented by a code hosting source, along with support code for use by implementations.

Index

• Constants
• Variables
• func AllHex(rev string) bool
• func Run(dir string, cmdline ...interface{}) ([]byte, error)
• func RunWithStdin(dir string, stdin io.Reader, cmdline ...interface{}) ([]byte, error)
• func ShortenSHA1(rev string) string
• func WorkDir(typ, name string) (dir, lockfile string, err error)
• type FileRev
• type Repo
  • func GitRepo(remote string) (Repo, error)
  • func LocalGitRepo(remote string) (Repo, error)
  • func NewRepo(vcs, remote string) (Repo, error)
• type RevInfo
• type RunError
  • func (e *RunError) Error() string
• type VCSError
  • func (e *VCSError) Error() string

Constants

const (
	MaxGoMod   = 16 << 20  // maximum size of go.mod file
	MaxLICENSE = 16 << 20  // maximum size of LICENSE file
	MaxZipFile = 500 << 20 // maximum size of downloaded zip file
)

Downloaded size limits.

Variables

var WorkRoot string

WorkRoot is the root of the cached work directory. It is set by cmd/go/internal/modload.InitMod.

Functions

func AllHex

func AllHex(rev string) bool

AllHex reports whether the revision rev is entirely lower-case hexadecimal digits.

func Run

func Run(dir string, cmdline ...interface{}) ([]byte, error)

Run runs the command line in the given directory (an empty dir means the current directory). It returns the standard output and, for a non-zero exit, a *RunError indicating the command, exit status, and standard error. Standard error is unavailable for commands that exit successfully.

func RunWithStdin

func RunWithStdin(dir string, stdin io.Reader, cmdline ...interface{}) ([]byte, error)

func ShortenSHA1

func ShortenSHA1(rev string) string

ShortenSHA1 shortens a SHA1 hash (40 hex digits) to the canonical length used in pseudo-versions (12 hex digits).

func WorkDir

func WorkDir(typ, name string) (dir, lockfile string, err error)

WorkDir returns the name of the cached work directory to use for the given repository type and name.

Types

type FileRev

type FileRev struct {
	Rev  string // requested revision
	Data []byte // file data
	Err  error  // error if any; os.IsNotExist(Err)==true if rev exists but file does not exist in that rev
}

A FileRev describes the result of reading a file at a given revision.

type Repo

type Repo interface {
	// List lists all tags with the given prefix.
	Tags(prefix string) (tags []string, err error)

	// Stat returns information about the revision rev.
	// A revision can be any identifier known to the underlying service:
	// commit hash, branch, tag, and so on.
	Stat(rev string) (*RevInfo, error)

	// Latest returns the latest revision on the default branch,
	// whatever that means in the underlying implementation.
	Latest() (*RevInfo, error)

	// ReadFile reads the given file in the file tree corresponding to revision rev.
	// It should refuse to read more than maxSize bytes.
	//
	// If the requested file does not exist it should return an error for which
	// os.IsNotExist(err) returns true.
	ReadFile(rev, file string, maxSize int64) (data []byte, err error)

	// ReadFileRevs reads a single file at multiple versions.
	// It should refuse to read more than maxSize bytes.
	// The result is a map from each requested rev strings
	// to the associated FileRev. The map must have a non-nil
	// entry for every requested rev (unless ReadFileRevs returned an error).
	// A file simply being missing or even corrupted in revs[i]
	// should be reported only in files[revs[i]].Err, not in the error result
	// from ReadFileRevs.
	// The overall call should return an error (and no map) only
	// in the case of a problem with obtaining the data, such as
	// a network failure.
	// Implementations may assume that revs only contain tags,
	// not direct commit hashes.
	ReadFileRevs(revs []string, file string, maxSize int64) (files map[string]*FileRev, err error)

	// ReadZip downloads a zip file for the subdir subdirectory
	// of the given revision to a new file in a given temporary directory.
	// It should refuse to read more than maxSize bytes.
	// It returns a ReadCloser for a streamed copy of the zip file,
	// along with the actual subdirectory (possibly shorter than subdir)
	// contained in the zip file. All files in the zip file are expected to be
	// nested in a single top-level directory, whose name is not specified.
	ReadZip(rev, subdir string, maxSize int64) (zip io.ReadCloser, actualSubdir string, err error)

	// RecentTag returns the most recent tag at or before the given rev
	// with the given prefix. It should make a best-effort attempt to
	// find a tag that is a valid semantic version (following the prefix),
	// or else the result is not useful to the caller, but it need not
	// incur great expense in doing so. For example, the git implementation
	// of RecentTag limits git's search to tags matching the glob expression
	// "v[0-9]*.[0-9]*.[0-9]*" (after the prefix).
	RecentTag(rev, prefix string) (tag string, err error)
}

A Repo represents a code hosting source. Typical implementations include local version control repositories, remote version control servers, and code hosting sites. A Repo must be safe for simultaneous use by multiple goroutines.

func GitRepo

func GitRepo(remote string) (Repo, error)

GitRepo returns the code repository at the given Git remote reference.

func LocalGitRepo

func LocalGitRepo(remote string) (Repo, error)

LocalGitRepo is like Repo but accepts both Git remote references and paths to repositories on the local file system.

func NewRepo

func NewRepo(vcs, remote string) (Repo, error)

type RevInfo

type RevInfo struct {
	Name    string    // complete ID in underlying repository
	Short   string    // shortened ID, for use in pseudo-version
	Version string    // version used in lookup
	Time    time.Time // commit time
	Tags    []string  // known tags for commit
}

A Rev describes a single revision in a source code repository.

type RunError

type RunError struct {
	Cmd      string
	Err      error
	Stderr   []byte
	HelpText string
}

func (*RunError) Error

func (e *RunError) Error() string

type VCSError

type VCSError struct {
	Err error
}

A VCSError indicates an error using a version control system. The implication of a VCSError is that we know definitively where to get the code, but we can't access it due to the error. The caller should report this error instead of continuing to probe other possible module paths.

TODO(bcmills): See if we can invert this. (Return a distinguished error for “repo not found” and treat everything else as terminal.)

func (*VCSError) Error

func (e *VCSError) Error() string