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limit size of cd history to 25 directories

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The existing implementation grows the $dirprev array without bounds. Besides
causing what would appear to be a memory leak it also makes the nextd and
prevd commands more expensive than they need to be. It also makes it harder to
create a useful "menu" cd command.

In addition to implementing a reasonable limit on the size of the $dirprev
array I've reformatted the code using fish_indent.

Update the documentation to include mentions of the $dirprev and $dirnext
variables as well as the limit on how much directory history is kept.

Fixes 2836
This commit is contained in:
Kurtis Rader
2016-03-21 16:51:39 -07:00
parent de1258e09b
commit 9d2b53450a
5 changed files with 36 additions and 27 deletions
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doc_src/prevd.txt
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@@ -11,6 +11,7 @@ prevd [ -l | --list ] [POS]
If the `-l` or `--list` flag is specified, the current history is also displayed.
Note that the `cd` command limits directory history to the 25 most recently visited directories. The history is stored in the `$dirprev` and `$dirnext` variables which this command manipulates.
\subsection prevd-example Example