func diffRange(repo *git.Repository, commitRange *gg.CommitRange, contextLines uint32) result.Result {
return result.Combine(func(values ...interface{}) result.Result {
opts := values[2].(git.DiffOptions)
opts.ContextLines = contextLines
return result.NewResult(repo.DiffTreeToTree(
values[0].(*git.Tree),
values[1].(*git.Tree),
&opts))
}, commitTree(commitRange.Parent), commitTree(commitRange.Child), diffOptions())
}
// @return result.Result<VersionStatus, error>
func writeVersion(repo *git.Repository, version string) result.Result {
oid := result.NewResult(repo.CreateBlobFromBuffer([]byte(version)))
return oid.FlatMap(func(oid interface{}) result.Result {
path := filepath.Join(gg.CommentRefBase, versionRef)
return result.NewResult(repo.References.Create(path,
oid.(*git.Oid), false, upgradeMessage))
}).FlatMap(func(ref interface{}) result.Result {
return result.NewSuccess(VersionStatusEqual)
})
}
// @return result.Result<string, error>
func readVersion(repo *git.Repository) result.Result {
path := filepath.Join(gg.CommentRefBase, versionRef)
ref := result.NewResult(repo.References.Lookup(path))
return ref.FlatMap(func(ref interface{}) result.Result {
oid := ref.(*git.Reference).Target()
return result.NewResult(repo.LookupBlob(oid))
}).FlatMap(func(blob interface{}) result.Result {
contents := blob.(*git.Blob).Contents()
return result.NewSuccess(string(contents))
})
}
// Parse commits from commitish string, populating a CommitRange. If a
// single commit is matched, it is paired with its first parent commit
// or resolves to an error
//
// return result.Result<*git.Commit, error>
func ResolveCommits(repo *git.Repository, commitish string) result.Result {
return result.NewResult(repo.Revparse(commitish)).FlatMap(func(value interface{}) result.Result {
spec := value.(*git.Revspec)
return resolveCommit(repo, spec.From()).FlatMap(func(f interface{}) result.Result {
fromCommit := f.(*git.Commit)
return resolveCommit(repo, spec.To()).Analysis(func(t interface{}) result.Result {
toCommit := t.(*git.Commit)
return result.NewSuccess(&CommitRange{fromCommit, toCommit})
}, func(err error) result.Result {
return resolveCommitParent(fromCommit).FlatMap(func(parent interface{}) result.Result {
return result.NewSuccess(&CommitRange{parent.(*git.Commit), fromCommit})
})
})
})
})
}
func resolveCommit(repo *git.Repository, object git.Object) result.Result {
if object != nil && object.Type() == git.ObjectCommit {
return result.NewResult(repo.LookupCommit(object.Id()))
}
return result.NewFailure(errors.New(noCommitError))
}
// Parse the commit hash of a single commit from a reference, converting to HEAD
// where needed
//
// return result.Result<*string, error>
func ResolveSingleCommitHash(repo *git.Repository, commitish string) result.Result {
return result.NewResult(repo.RevparseSingle(ExpandCommitish(commitish))).FlatMap(getObjectId)
}