Subject: Re: Link t the souce code
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, "Jonathan S. Katz" <jkatz@postgresql.org>,
 "Daniel Westermann (DWE)" <daniel.westermann@dbi-services.com>,
 "pgsql-docs@lists.postgresql.org" <pgsql-docs@lists.postgresql.org>
References: <202107211721.pnmoavcgidqb@alvherre.pgsql>
From: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Message-ID: <064d5f63-116d-3291-0d5d-88748464b448@enterprisedb.com>
Date: Wed, 21 Jul 2021 20:09:00 +0200
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On 21.07.21 19:21, Alvaro Herrera wrote:
> On 2021-Jul-21, Peter Eisentraut wrote:
> 
>> On 21.07.21 01:45, Alvaro Herrera wrote:
>>>    <screen>
>>> -<userinput>gunzip postgresql-&version;.tar.gz</userinput>
>>> -<userinput>tar xf postgresql-&version;.tar</userinput>
>>> +<userinput>tar xfa postgresql-&version;.tar.gz</userinput>
>>>    </screen>
>>
>> The "a" option only applies when creating a tar archive ("c" command). So
>> adding it here does nothing.
> 
> Oh, so the current `tar x` knows to uncompress the file without any
> additional options?  I've been pointlessly adding 'z', 'j', 'a' for years ...
> That means we can remove the `gunzip` line and replace it with nothing.

Unless you want to assume GNU tar, the gunzip is still necessary.