"Compare to Stash..." custom comparision for Sublimerge

gistfile1.txt

# Add the custom comparision "Compare to Stash..." to SublimeMerge plugin 
# This allows to compare the current file with the version contained in a stash.

# Custom Comparisions.sublime-settings -- User
{
    "custom_comparisons_user": [
        {
            "name": "Compare to Stash...",
            "requires": "git",
            "steps": [
                {
                    "quick_panel": {
                        "name": "get_stash",
                        "source": {
                            "execute": {
                                "command": "{git} stash list",
                                "directory": "{sublimerge:current_file_dir}"
                            },
                            "item": {
                                "regexp": "^(stash\\@\\{.+\\})(?:\\:\\s+)(.+)$",
                                "caption": ["@1: @2", "{sublimerge:current_file_name} in @1"],
                                "value": "@1"
                            },
                            "empty_message": "There are no stashes"
                        }
                    }
                },
                {
                    "define": {
                        "output_file": "{sublimerge:temp_dir}/{sublimerge:current_file|basename}@stash"
                    }
                },
                {
                    "compare": {
                        "execute": {
                            "command": "{git} show {get_stash}:\"./{sublimerge:current_file_name}\" > \"{output_file}\"",
                            "directory": "{sublimerge:current_file_dir}"
                        },

                        "left": {
                            "title": "{sublimerge:current_file|basename}@{get_stash}",
                            "file": "{output_file}",
                            "temporary": true
                        },

                        "right": {
                            "file": "{sublimerge:current_file}",
                            "temporary": false
                        }
                    }
                }
            ]
        }
    ]
}