Create shims for all model classes in SessionStateLoader

This guards against accidentally renaming a model field and thereby breaking
user's custom commands. With this change we'll get a build failure when we do
that.

pkg/gui/services/custom_commands/models.go

@@ -0,0 +1,96 @@
+package custom_commands
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/commands/models"
+	"github.com/stefanhaller/git-todo-parser/todo"
+)
+
+// We create shims for all the model classes in order to get a more stable API
+// for custom commands. At the moment these are almost identical to the model
+// classes, but this allows us to add "private" fields to the model classes that
+// we don't want to expose to custom commands, or rename a model field to a
+// better name without breaking people's custom commands. In such a case we add
+// the new, better name to the shim but keep the old one for backwards
+// compatibility. We already did this for Commit.Sha, which was renamed to Hash.
+
+type Commit struct {
+	Hash          string // deprecated: use Sha
+	Sha           string
+	Name          string
+	Status        models.CommitStatus
+	Action        todo.TodoCommand
+	Tags          []string
+	ExtraInfo     string
+	AuthorName    string
+	AuthorEmail   string
+	UnixTimestamp int64
+	Divergence    models.Divergence
+	Parents       []string
+}
+
+type File struct {
+	Name                    string
+	PreviousName            string
+	HasStagedChanges        bool
+	HasUnstagedChanges      bool
+	Tracked                 bool
+	Added                   bool
+	Deleted                 bool
+	HasMergeConflicts       bool
+	HasInlineMergeConflicts bool
+	DisplayString           string
+	ShortStatus             string
+	IsWorktree              bool
+}
+
+type Branch struct {
+	Name           string
+	DisplayName    string
+	Recency        string
+	Pushables      string
+	Pullables      string
+	UpstreamGone   bool
+	Head           bool
+	DetachedHead   bool
+	UpstreamRemote string
+	UpstreamBranch string
+	Subject        string
+	CommitHash     string
+}
+
+type RemoteBranch struct {
+	Name       string
+	RemoteName string
+}
+
+type Remote struct {
+	Name     string
+	Urls     []string
+	Branches []*RemoteBranch
+}
+
+type Tag struct {
+	Name    string
+	Message string
+}
+
+type StashEntry struct {
+	Index   int
+	Recency string
+	Name    string
+}
+
+type CommitFile struct {
+	Name         string
+	ChangeStatus string
+}
+
+type Worktree struct {
+	IsMain        bool
+	IsCurrent     bool
+	Path          string
+	IsPathMissing bool
+	GitDir        string
+	Branch        string
+	Name          string
+}