facebook/zstd

better gzip(1) command line option compatibility: Support -l for gzip files

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#3.037 geöffnet am 30. Jan. 2022

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feature requesthelp wantedlong-term

Beschreibung

Is your feature request related to a problem? Please describe. I'm experimenting with the "gzip" symlink on zstd binary and notice that there these compatibility options missing:

-n --no-name When compressing, do not save the original file name and time stamp by default. (The original name is always saved if the name had to be truncated.)

-l --list For each compressed file, list the following fields: compressed size: size of the compressed file uncompressed size: size of the uncompressed file ratio: compression ratio (0.0% if unknown) uncompressed_name: name of the uncompressed file

While listing is available as an option, it just aborts with an error message:

zstd --format=gzip -l *gz
Frames  Skips  Compressed  Uncompressed  Ratio  Check  Filename
File "test-0.1.0.tar.gz" not compressed by zstd

Describe the solution you'd like

provide more drop-in compatibility when used via a symlink to "gzip" with the gzip command line options, as documented here (and elsewhere): https://linux.die.net/man/1/gzip

Contributor Guide

Tech Stack
cshell
Domain
cli
Issue Type
feature
SchwierigkeitGeschätzte Implementierungsschwierigkeit für neue Contributors, von 1 für sehr kleine Änderungen bis 5 für Expertenarbeit.
3
Geschätzte ZeitEin grober Zeitrahmen, um zu recherchieren, zu implementieren, zu testen und einen Pull Request vorzubereiten.
half day
AktivitätsstatusWie verfügbar das Issue gerade wirkt: frisch, aktiv, stale, blockiert oder wartet auf Maintainer-Input.
stale
KlarheitWie klar das Issue die erwartete Änderung, Akzeptanzkriterien und den nächsten Schritt erklärt.
clear
Voraussetzungen
C programmingzstd codebase basics
EinsteigerfreundlichkeitEin Score von 1 bis 100, der schätzt, wie zugänglich dieses Issue für First-Time Contributors ist.
40
Research-Richtung
Examine the gzip compatibility code in the 'programs/' directory, likely in a file like 'gzip.c'. Understand how other gzip options are implemented. Implement l to list compressed/uncompressed sizes, ratio, and name by reading gzip headers. Implement n to suppress saving original name and timestamp during compression. No existing PRs or assignees, so the issue is open for contribution.