From: Jim Porter <jporterbugs@gmail.com>
To: 56509@debbugs.gnu.org
Subject: bug#56509: 29.0.50; Eshell variable aliases don't fully support indexing
Date: Mon, 11 Jul 2022 19:47:02 -0700 [thread overview]
Message-ID: <e3111834-b5f3-7d2c-9895-0231eb7785be@gmail.com> (raw)
Normally in Eshell, you can index variables to get the nth element, e.g.
"echo $exec-path[0]" would print the first element in your `exec-path'
variable. However, this doesn't always work for "alias" variables. From
"emacs -Q -f eshell":
~ $ alias first 'echo $1[0]'
~ $ first (list 1 2)
(1 2)
This should return 1, since it says to print the first (well, 0th)
element of the first argument.
There's also a related issue with alias variables that reference other
alias variables:
~ $ echo $PWD
/home/jim
~ $ echo $+
/home/jim
~ $ cd ..
/home $ echo $PWD
/home
/home $ echo $+
/home/jim
The '$+' alias is mapped to '$PWD', but rather than using Eshell's
definition for '$PWD', it erroneously consults the system's '$PWD'
environment variable, which in this case is the directory that Emacs was
started from.
Patch forthcoming; just getting a bug number.
next reply other threads:[~2022-07-12 2:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-12 2:47 Jim Porter [this message]
2022-07-12 3:06 ` bug#56509: [PATCH] 29.0.50; Eshell variable aliases don't fully support indexing Jim Porter
2022-07-12 4:11 ` Jim Porter
2022-07-12 13:11 ` bug#56509: " Lars Ingebrigtsen
2022-07-16 12:09 ` Mattias Engdegård
2022-07-17 3:13 ` Jim Porter
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