add symbolic link file type support

[syokensyo]

PR Content Desc

• Sometimes not standard rpm package container symbolic link, it is better to recognize them.
• FileMode::file_type is public, so it is better to make the const REGULAR_FILE_TYPE DIR_FILE_TYPE SYMBOLIC_LINK_FILE_TYPE public also to ease usage.

📜 Checklist

• [x] Commits are cleanly separated and have useful messages
• [x] A changelog entry or entries has been added to CHANGELOG.md
• [ ] Documentation is thorough
• [x] Test coverage is excellent and passes
• [x] Works when tests are run --all-features enabled

[dralley]

@syokensyo Any chance you could add an end-to-end test, building a package with a symbolic link and installing it / and checking the file entries in the header?

The two places to touch:

• https://github.com/rpm-rs/rpm/blob/master/tests/compat.rs#L36 - Add a symlink to the built package
• https://github.com/rpm-rs/rpm/blob/master/src/tests.rs#L50 - Add a symlinks and update the code that checks the file entries in the header

[syokensyo]

@syokensyo Any chance you could add an end-to-end test, building a package with a symbolic link and installing it / and checking the file entries in the header?

The two places to touch:

• https://github.com/rpm-rs/rpm/blob/master/tests/compat.rs#L36 - Add a symlink to the built package
• https://github.com/rpm-rs/rpm/blob/master/src/tests.rs#L50 - Add a symlinks and update the code that checks the file entries in the header

Sure, will work on this.

[syokensyo]

To use existing with_file api, add an empty file in test_assets for the symbolic file to create.

[dralley]

@syokensyo See CI failures

[syokensyo]

Forgot to revert the temp file permission changes for existing test case to pass on my local machine, reverted.

[dralley]

Thanks for the contribution! I can squash the typo later, unless you want to take a pass at cleaning up the Files APIs? :D