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144 lines
5.2 KiB
Text
144 lines
5.2 KiB
Text
Z(1) User Commands Z(1)
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NAME
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z - jump around
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SYNOPSIS
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z [-chlrtx] [regex1 regex2 ... regexn]
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AVAILABILITY
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bash, zsh
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DESCRIPTION
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Tracks your most used directories, based on 'frecency'.
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After a short learning phase, z will take you to the most 'frecent'
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directory that matches ALL of the regexes given on the command line, in
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order.
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For example, z foo bar would match /foo/bar but not /bar/foo.
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OPTIONS
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-c restrict matches to subdirectories of the current directory
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-h show a brief help message
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-l list only
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-r match by rank only
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-t match by recent access only
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-x remove the current directory from the datafile
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EXAMPLES
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z foo cd to most frecent dir matching foo
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z foo bar cd to most frecent dir matching foo, then bar
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z -r foo cd to highest ranked dir matching foo
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z -t foo cd to most recently accessed dir matching foo
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z -l foo list all dirs matching foo (by frecency)
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NOTES
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Installation:
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Put something like this in your $HOME/.bashrc or $HOME/.zshrc:
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. /path/to/z.sh
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cd around for a while to build up the db.
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PROFIT!!
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Optionally:
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Set $_Z_CMD to change the command name (default z).
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Set $_Z_DATA to change the datafile (default $HOME/.z).
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Set $_Z_NO_RESOLVE_SYMLINKS to prevent symlink resolution.
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Set $_Z_NO_PROMPT_COMMAND to handle PROMPT_COMMAND/precmd your-
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self.
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Set $_Z_EXCLUDE_DIRS to an array of directory trees to exclude.
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Set $_Z_OWNER to allow usage when in 'sudo -s' mode.
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(These settings should go in .bashrc/.zshrc before the line
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added above.)
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Install the provided man page z.1 somewhere like
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/usr/local/man/man1.
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Aging:
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The rank of directories maintained by z undergoes aging based on a sim-
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ple formula. The rank of each entry is incremented every time it is
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accessed. When the sum of ranks is over 9000, all ranks are multiplied
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by 0.99. Entries with a rank lower than 1 are forgotten.
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Frecency:
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Frecency is a portmanteau of 'recent' and 'frequency'. It is a weighted
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rank that depends on how often and how recently something occurred. As
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far as I know, Mozilla came up with the term.
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To z, a directory that has low ranking but has been accessed recently
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will quickly have higher rank than a directory accessed frequently a
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long time ago.
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Frecency is determined at runtime.
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Common:
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When multiple directories match all queries, and they all have a common
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prefix, z will cd to the shortest matching directory, without regard to
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priority. This has been in effect, if undocumented, for quite some
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time, but should probably be configurable or reconsidered.
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Tab Completion:
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z supports tab completion. After any number of arguments, press TAB to
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complete on directories that match each argument. Due to limitations of
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the completion implementations, only the last argument will be com-
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pleted in the shell.
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Internally, z decides you've requested a completion if the last argu-
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ment passed is an absolute path to an existing directory. This may
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cause unexpected behavior if the last argument to z begins with /.
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ENVIRONMENT
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A function _z() is defined.
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The contents of the variable $_Z_CMD is aliased to _z 2>&1. If not set,
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$_Z_CMD defaults to z.
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The environment variable $_Z_DATA can be used to control the datafile
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location. If it is not defined, the location defaults to $HOME/.z.
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The environment variable $_Z_NO_RESOLVE_SYMLINKS can be set to prevent
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resolving of symlinks. If it is not set, symbolic links will be
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resolved when added to the datafile.
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In bash, z appends a command to the PROMPT_COMMAND environment variable
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to maintain its database. In zsh, z appends a function _z_precmd to the
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precmd_functions array.
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The environment variable $_Z_NO_PROMPT_COMMAND can be set if you want
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to handle PROMPT_COMMAND or precmd yourself.
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The environment variable $_Z_EXCLUDE_DIRS can be set to an array of
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directory trees to exclude from tracking. $HOME is always excluded.
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Directories must be full paths without trailing slashes.
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The environment variable $_Z_OWNER can be set to your username, to
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allow usage of z when your sudo environment keeps $HOME set.
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FILES
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Data is stored in $HOME/.z. This can be overridden by setting the
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$_Z_DATA environment variable. When initialized, z will raise an error
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if this path is a directory, and not function correctly.
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A man page (z.1) is provided.
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SEE ALSO
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regex(7), pushd, popd, autojump, cdargs
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Please file bugs at https://github.com/rupa/z/
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z January 2013 Z(1)
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