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From: Zach Riggle <zachriggle@gmail.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Collapse a file path to the shortest representation
Date: Fri, 13 May 2022 12:53:37 -0500	[thread overview]
Message-ID: <CAMP9c5kFDdOK4PS2-prd4oxk69fkXCXstANkM4Skjg0Law0DCg@mail.gmail.com> (raw)

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Is there a ZSH standard way to collapse a file path to its shortest
representation that would be idempotent per Chapter 14.7?

For example, one might

echo "$filepath" | sed -E "s|$HOME/?|~/|"
echo "$filepath" | sed -E "s|$HOME/?|\$HOME/|"

In order to turn

/home/username/bar/baz → ~/bar/baz
/home/username/bar/baz → $HOME/bar/baz

To achieve this effect.

From the documentation, "14.7 Filename Expansion" has a lot of ways that
paths can be expanded, including...

... the path is checked to see if it has a named directory as its prefix.
If so, then the prefix portion is replaced with a ‘~’ followed by the name
of the directory ....

Is there a standardized way to access this expansion with e.g.
/path/to/somedir → ~SOMEDIR/foo?

I expect this can be implemented manually by parsing the output of "hash
-d" or similar, but I figured it was worth asking if there's an easy
interface to this.

I'm not concerned as much about "14.7.1 Dynamic named directories" but for
completeness it would be neat.

*Zach Riggle*

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             reply	other threads:[~2022-05-13 17:55 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-13 17:53 Zach Riggle [this message]
2022-05-13 18:03 ` Mikael Magnusson
2022-05-18 22:42   ` Zach Riggle

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