flat-packager 0.4.0

Pack a repository into one flat text archive and restore it later.

Flat Packager

Flat Packager turns a repository into one flat text archive, then rebuilds the original folder structure from that archive.

The default archive format is newline-delimited JSON with chunked base64 file payloads. Text files, binary files, empty directories, and symlinks survive the round trip. Restores validate archive paths, duplicate entries, symlink ancestry, chunk ordering, and recorded SHA-256 hashes before writing file contents.

Install

From PyPI:

python3 -m pip install flat-packager

From a checkout:

python3 -m pip install .

For development:

python3 -m pip install -e ".[dev]"
make test

This installs four console commands:

flat-pack --help
flat-unpack --help
flat-inspect --help
flat-verify --help

The repository also keeps compatibility wrappers:

python3 pack_repo.py --help
python3 unpack_repo.py --help

Pack a Repository

Pack a local repository:

flat-pack /path/to/repo repo.flat.txt

Pack a public GitHub repository by shorthand or Git URL:

flat-pack owner/repo repo.flat.txt
flat-pack https://github.com/owner/repo.git repo.flat.txt

Remote repositories are cloned with --depth 1 by default. You can select a branch or tag, include submodules, or request a full clone:

flat-pack owner/repo repo.flat.txt --branch main
flat-pack owner/repo repo.flat.txt --recurse-submodules
flat-pack owner/repo repo.flat.txt --no-shallow

By default, local directory scans include all files and directories except .git. To include only tracked git files:

flat-pack /path/to/repo repo.flat.txt --tracked-only

Useful options:

flat-pack /path/to/repo repo.flat.txt --exclude "node_modules/*"
flat-pack /path/to/repo repo.flat.txt --max-file-bytes 10485760
flat-pack /path/to/repo repo.flat.txt --include-git

Format and Compression

New archives use format version 2 by default. Version 2 stores each regular file as metadata plus one or more base64 chunk records, which keeps memory usage bounded while packing and restoring large files.

flat-pack /path/to/repo repo.flat.txt --chunk-size 1048576

To write the legacy inline format:

flat-pack /path/to/repo repo.v1.flat.txt --format-version 1

To gzip-compress an archive:

flat-pack /path/to/repo repo.flat.txt.gz --compress gzip

--compress auto is the default and writes gzip when the output path ends in .gz. Restore, inspect, and verify commands auto-detect gzip archives.

Restore a Repository

flat-unpack repo.flat.txt restored-repo

If the output directory already contains files:

flat-unpack repo.flat.txt restored-repo --overwrite

Restores are staged in a temporary sibling directory and moved into place only after the full archive validates and writes successfully. If validation fails, the existing output directory is left unchanged.

Validate an archive without writing files:

flat-unpack repo.flat.txt restored-repo --verify-only

You can also validate without naming an output directory:

flat-verify repo.flat.txt

On systems where symlink creation is unavailable:

flat-unpack repo.flat.txt restored-repo --no-symlinks

Inspect an Archive

flat-inspect repo.flat.txt
flat-inspect repo.flat.txt --json
flat-inspect repo.flat.txt --limit 20

Inspection validates the archive first, then reports version, compression, source metadata, entry counts, total file bytes, chunk count, largest files, and symlinks.

Safety Model

Flat Packager is intended for moving repository snapshots, not for executing or trusting their contents. Treat archives from untrusted sources the same way you would treat a zip file from an untrusted source.

The restore step rejects:

• absolute archive paths
• .., ., empty, or backslash path segments
• duplicate archive paths
• file or directory records nested underneath an archived symlink
• chunk records that are missing, out of order, corrupt, or attached to the wrong file
• corrupt base64, size, or SHA-256 data

Restored symlinks may still point outside the restored repository, because that is valid repository content. Use --no-symlinks if you want symlink targets written as text files instead.

Limitations

• File contents are base64 encoded, so archives are larger than raw file bytes. Use gzip compression when archive size matters.
• Legacy format version 1 stores each file as one JSON record and is memory-heavy for large files. Version 2 is chunked and is the default.
• Remote GitHub packing depends on local git and whatever authentication your git installation already has configured.
• Git LFS files are captured as whatever exists in the cloned checkout. If LFS smudge is disabled or unavailable, pointer files may be archived instead of large objects.
• This stores file bytes, directory modes, file modes, and symlink targets. It does not preserve owners, groups, extended attributes, ACLs, hard links, timestamps, git history, or ignored remote refs.

Test

python3 -m unittest discover -s tests

Build a wheel:

python3 -m pip install ".[dev]"
python3 -m build

Release

See CHANGELOG.md and docs/RELEASING.md.

make release-check