PackageCopyStrategy: Package copy strategy

In muttest: Mutation Testing

Package copy strategy

Description

It copies all files and directories from the original directory to a temporary directory.

When symlink = TRUE, only the top-level directory holding the mutated file (e.g. ⁠R/⁠) is copied; every other top-level directory and root file is symlinked to the original. For N mutants this avoids N full copies, which matters when the project carries large ⁠inst/⁠/⁠data/⁠ directories. Tests only read the symlinked files, so this is safe as long as the test suite does not write into the package's own directories (writes through a symlink would modify the original).

Super class

muttest::CopyStrategy -> PackageCopyStrategy

Methods

Public methods

• PackageCopyStrategy$new()

• PackageCopyStrategy$execute()

• PackageCopyStrategy$clone()

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Method new()

Create a package copy strategy

Usage

PackageCopyStrategy$new(symlink = FALSE)

Arguments

symlink

If TRUE, symlink unchanged files instead of copying them.

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Method execute()

Copy project files, excluding hidden and temp directories

Usage

PackageCopyStrategy$execute(original_dir, plan)

Arguments

original_dir

The original directory to copy from

plan

The current test plan

Returns

The path to the temporary directory

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Method clone()

The objects of this class are cloneable with this method.

Usage

PackageCopyStrategy$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

See Also

Other CopyStrategy: CopyStrategy, default_copy_strategy()

muttest documentation built on July 21, 2026, 5:09 p.m.