factor out code for loading models

pkg/commands/loading_commit_files.go

@@ -0,0 +1,50 @@
+package commands
+
+import (
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/commands/patch"
+	"github.com/jesseduffield/lazygit/pkg/models"
+)
+
+// GetFilesInDiff get the specified commit files
+func (c *GitCommand) GetFilesInDiff(from string, to string, reverse bool, patchManager *patch.PatchManager) ([]*models.CommitFile, error) {
+	reverseFlag := ""
+	if reverse {
+		reverseFlag = " -R "
+	}
+
+	filenames, err := c.OSCommand.RunCommandWithOutput("git diff --submodule --no-ext-diff --name-status %s %s %s", reverseFlag, from, to)
+	if err != nil {
+		return nil, err
+	}
+
+	return c.getCommitFilesFromFilenames(filenames, to, patchManager), nil
+}
+
+// filenames string is something like "file1\nfile2\nfile3"
+func (c *GitCommand) getCommitFilesFromFilenames(filenames string, parent string, patchManager *patch.PatchManager) []*models.CommitFile {
+	commitFiles := make([]*models.CommitFile, 0)
+
+	for _, line := range strings.Split(strings.TrimRight(filenames, "\n"), "\n") {
+		// typical result looks like 'A my_file' meaning my_file was added
+		if line == "" {
+			continue
+		}
+		changeStatus := line[0:1]
+		name := line[2:]
+		status := patch.UNSELECTED
+		if patchManager != nil && patchManager.To == parent {
+			status = patchManager.GetFileStatus(name)
+		}
+
+		commitFiles = append(commitFiles, &models.CommitFile{
+			Parent:       parent,
+			Name:         name,
+			ChangeStatus: changeStatus,
+			PatchStatus:  status,
+		})
+	}
+
+	return commitFiles
+}