---
license: cc0-1.0
pretty_name: Release tarball checksums (Debian, Homebrew, Guix)
tags:
- file-hashes
configs:
- config_name: data
  data_files: data/tarballs.parquet
- config_name: maps
  data_files: maps/md5.parquet
---

# Release tarball checksums (Debian, Homebrew, Guix)

Per-artifact checksums of **release archives as shipped** — the
tarball itself, not its contents. Content-level indexes (Software
Heritage, distro file digests) unpack archives before hashing, so a
pristine `hello-2.12.3.tar.gz` matches nothing in them; the three
package indexes here publish exact hashes of the artifact:

- **debian** — sid `Sources.xz`, all four components: md5 **and**
  sha256 per source file (orig/debian tarballs, `.dsc`, `.asc`) —
  each row is a single witness carrying both digests
- **homebrew** — `formula.json`: sha256 of each formula's stable
  upstream archive
- **guix** — `sources.json`, `outputHashMode=flat` entries only
  (recursive entries are NAR-style directory hashes, not raw bytes):
  sha256 of raw tarball bytes, with content-addressed mirror URLs

**159,973 rows** (debian 131,303 / guix 20,390 / homebrew 8,280),
harvested 2026-08-11.

## Layout

- `data/tarballs.parquet` — witness, sha256, md5, name, version,
  filename, loc; **sorted by sha256**. `loc` is the Debian pool
  directory, the Homebrew upstream URL, or the Guix content-addressed
  mirror URL.
- `maps/md5.parquet` — md5 → sha256 (Debian rows), **sorted by md5**.
- `tarballs.sha256.bloom` — DCSO-format membership filter over the
  153,245 distinct sha256 keys (p = 10⁻⁴, 359 KiB, lowercase-hex
  keys). `hdx filters fetch tarballs` installs it so `hdx scan` can
  route matching files to this dataset.
- `tarballs.tsv.gz` — the normalized harvest the parquet is built
  from.

Both parquet files carry page indexes (zstd, no dictionaries,
128 KiB pages), so a point lookup over HTTP range reads fetches a few
tens of KB. This is how [hashdex](https://github.com/davidar/hashdex)
resolves hashes from the CLI and from a static browser page.

## Rebuild

`release_tarballs.py` in this repo fetches the three indexes (six
metadata GETs, ~50 MB, no package content) and writes the TSV;
`tarballs_parquet.py` converts and verifies (sorted keys, page
indexes present). The bloom is built by hdx itself from the TSV's
distinct sha256 column:

```
zcat tarballs.tsv.gz | cut -f2 | sort -u > sha256.txt
hdx filters build tarballs sha256 sha256.txt
# → ~/.cache/hashdex/filters/tarballs.sha256.bloom
```

Sources move — Debian sid continuously, Homebrew and Guix per
commit — so a rebuild reflects harvest time; regenerate all three
artifacts (parquet, maps, bloom) from the same TSV so they never
disagree.

Checksums metadata © the respective projects (Debian archive,
Homebrew, GNU Guix), generously public; this compilation CC0.