Vendor latest git-bug version

This adds the latest version of the necessary parts of git-bug (entity, identity, repository, util, bug) to the repo so they can be accessed later to read and write bugs.

Author: vincetiu8

README.md

@@ -0,0 +1,31 @@
+Packages Needed:
+ - Identity
+ - Repository
+ - Entity
+ - Util
+
+Methodology:  
+This tool is designed to import a repository using an outdated version of git-bug and update it to be compatible with a
+newer version. This allows for breaking changes to git-bug without completely crashing the repositories of the user.
+
+This tool will contain all versions of git-bug with breaking changes. It will make any necessary edits to the objects to
+convert them between the two versions. If the repository needs to jump between multiple versions, it will then complete
+the steps necessary to jump to the next version and so on until the target version is reached.
+
+Sections:
+ - Identity
+ - OperationPack
+ - Config
+ 
+Todo for migration tool:  
+ - Remove legacy author and create new identity out of it -- forwards compatible
+ - https://github.com/MichaelMure/git-bug-migration/migration1/pull/411: identity.Version need to store one time + Lamport time for each
+ other Entity (Bug, config, PR ...) instead of a single one for Bug at the moment.
+ - At the moment bridge credentials are stored in the global git config. In the future it could be stored in a real
+credential store. Migrating that would be nice.
+ - AvatarURL in the identities reference an external images. Eventually storing all that in git itself would be nice.
+Migration would be downloading all that for offline use and rewriting those references.
+
+Todo for git-bug:  
+- Bump the OperationPack format version to 2 so that the legacy code can be removed. We don't need it to still be able
+to read the data, but when we remove the legacy code we need to be able to detect that we can't read that anymore.

go.mod

@@ -0,0 +1,12 @@
+module github.com/MichaelMure/git-bug-migration
+
+go 1.14
+
+require (
+	github.com/blang/semver v3.5.1+incompatible
+	github.com/dustin/go-humanize v1.0.0
+	github.com/fatih/color v1.9.0
+	github.com/pkg/errors v0.9.1
+	github.com/stretchr/testify v1.6.1
+	golang.org/x/text v0.3.3
+)

go.sum

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/MichaelMure/git-bug-migration/migration1/bug"
+	"github.com/MichaelMure/git-bug-migration/migration1/repository"
+)
+
+const rootCommandName = "git-bug-migration"
+
+var repo repository.ClockedRepo
+
+func main() {
+	cwd, err := os.Getwd()
+	if err != nil {
+		panic(fmt.Errorf("unable to get the current working directory: %q", err))
+	}
+
+	repo, err = repository.NewGitRepo(cwd, []repository.ClockLoader{bug.ClockLoader})
+	if err == repository.ErrNotARepo {
+		panic(fmt.Errorf("%s must be run from within a git repo", rootCommandName))
+	}
+
+	if err != nil {
+		panic(err)
+	}
+
+	for streamedBug := range bug.ReadAllLocalBugs(repo) {
+		if streamedBug.Err != nil {
+			fmt.Print(fmt.Errorf("Got error when reading bug: %q", err))
+			continue
+		}
+
+		//switch streamedBug.Bug
+		fmt.Print(streamedBug.Bug.FirstOp().GetAuthor())
+	}
+}