testable

type CommandExecutor interface {
	// LookPath searches for an executable named file in the directories
	// named by the PATH environment variable.
	LookPath(file string) (string, error)

	// CommandContext returns an *exec.Cmd configured to run name with the
	// given arguments. The provided context is used for cancellation.
	CommandContext(ctx context.Context, name string, args ...string) *exec.Cmd
}

type FileSystem interface {
	// Abs returns an absolute representation of path.
	Abs(path string) (string, error)

	// EvalSymlinks returns the path name after the evaluation of any symbolic links.
	EvalSymlinks(path string) (string, error)

	// Stat returns a FileInfo describing the named file.
	Stat(name string) (os.FileInfo, error)

	// Create creates or truncates the named file.
	Create(name string) (*os.File, error)

	// WriteFile writes data to the named file, creating it if necessary.
	WriteFile(name string, data []byte, perm os.FileMode) error

	// ReadFile reads the named file and returns the contents.
	ReadFile(name string) ([]byte, error)

	// MkdirAll creates a directory named path, along with any necessary parents.
	MkdirAll(path string, perm os.FileMode) error

	// WalkDir walks the file tree rooted at root, calling fn for each file or
	// directory in the tree, including root.
	WalkDir(root string, fn fs.WalkDirFunc) error

	// Open opens the named file for reading.
	Open(name string) (*os.File, error)
}

type GitOpener interface {
	PlainOpen(path string) (GitRepository, error)
}

type GitRepository interface {
	Head() (*plumbing.Reference, error)
	Log(opts *git.LogOptions) (object.CommitIter, error)
	Remotes() ([]*git.Remote, error)
	References() (storer.ReferenceIter, error)
	CommitObject(h plumbing.Hash) (*object.Commit, error)
	TagObject(h plumbing.Hash) (*object.Tag, error)
	Tags() (storer.ReferenceIter, error)
}

type MockCommandExecutor struct {
	// LookPathErr, when non-nil, is returned by LookPath for any file.
	LookPathErr error

	// LookPathResult is returned as the path when LookPathErr is nil.
	LookPathResult string

	// CommandOutputs maps a command key (e.g., "git blame --porcelain") to the
	// stdout that the resulting exec.Cmd should produce. The key is built from
	// the command name and all arguments joined by spaces.
	CommandOutputs map[string]string

	// CommandErrors maps a command key to an error message. When set, the
	// resulting exec.Cmd will fail with that message written to stderr.
	CommandErrors map[string]string

	// DefaultOutput is returned when no key matches in CommandOutputs.
	DefaultOutput string

	// DefaultError, when non-empty, makes every unmatched command fail.
	DefaultError string

	// Calls records the command keys that were invoked, for assertion purposes.
	Calls []string
}

type MockFileSystem struct {
	AbsFn          func(path string) (string, error)
	EvalSymlinksFn func(path string) (string, error)
	StatFn         func(name string) (os.FileInfo, error)
	CreateFn       func(name string) (*os.File, error)
	WriteFileFn    func(name string, data []byte, perm os.FileMode) error
	ReadFileFn     func(name string) ([]byte, error)
	MkdirAllFn     func(path string, perm os.FileMode) error
	WalkDirFn      func(root string, fn fs.WalkDirFunc) error
	OpenFn         func(name string) (*os.File, error)
}

type MockGitOpener struct {
	// Repo is the repository returned by PlainOpen when OpenFunc is nil.
	Repo GitRepository

	// OpenErr is the error returned by PlainOpen when OpenFunc is nil.
	OpenErr error

	// OpenFunc, if set, is called instead of using Repo/OpenErr.
	OpenFunc func(path string) (GitRepository, error)

	// OpenCalls records the paths passed to PlainOpen.
	OpenCalls []string
}

type MockGitRepository struct {
	// HeadRef is returned by Head().
	HeadRef *plumbing.Reference
	// HeadErr is the error returned by Head().
	HeadErr error

	// LogIter is returned by Log().
	LogIter object.CommitIter
	// LogErr is the error returned by Log().
	LogErr error
	// LogCalls records LogOptions passed to Log().
	LogCalls []*git.LogOptions

	// RemotesList is returned by Remotes().
	RemotesList []*git.Remote
	// RemotesErr is the error returned by Remotes().
	RemotesErr error

	// ReferencesIter is returned by References().
	ReferencesIter storer.ReferenceIter
	// ReferencesErr is the error returned by References().
	ReferencesErr error

	// CommitObjects maps hashes to commits for CommitObject().
	CommitObjects map[plumbing.Hash]*object.Commit
	// CommitObjectErr is the default error returned by CommitObject() when
	// the hash is not found in CommitObjects.
	CommitObjectErr error

	// TagObjects maps hashes to tags for TagObject().
	TagObjects map[plumbing.Hash]*object.Tag
	// TagObjectErr is the default error returned by TagObject() when
	// the hash is not found in TagObjects.
	TagObjectErr error

	// TagsIter is returned by Tags().
	TagsIter storer.ReferenceIter
	// TagsErr is the error returned by Tags().
	TagsErr error
}

type OsFileSystem struct{}

type RealCommandExecutor struct{}

type RealGitOpener struct{}

type RealGitRepository struct {
	// contains filtered or unexported fields
}