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156 lines
4.5 KiB
Groff
156 lines
4.5 KiB
Groff
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.TH "Z" "1" "January 2013" "z" "User Commands"
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.SH
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NAME
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z \- jump around
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.SH
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SYNOPSIS
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z [\-chlrt] [regex1 regex2 ... regexn]
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.SH
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AVAILABILITY
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bash, zsh
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.SH
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DESCRIPTION
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Tracks your most used directories, based on 'frecency'.
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.P
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After a short learning phase, \fBz\fR will take you to the most 'frecent'
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directory that matches ALL of the regexes given on the command line.
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.SH
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OPTIONS
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.TP
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\fB\-c\fR
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restrict matches to subdirectories of the current directory.
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.TP
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\fB\-h\fR
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show a brief help message
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.TP
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\fB\-l\fR
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list only
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.TP
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\fB\-r\fR
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match by rank only
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.TP
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\fB\-t\fR
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match by recent access only
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.SH EXAMPLES
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.TP 14
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\fBz foo\fR
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cd to most frecent dir matching foo
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.TP 14
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\fBz foo bar\fR
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cd to most frecent dir matching foo and bar
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.TP 14
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\fBz -r foo\fR
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cd to highest ranked dir matching foo
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.TP 14
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\fBz -t foo\fR
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cd to most recently accessed dir matching foo
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.TP 14
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\fBz -l foo\fR
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list all dirs matching foo (by frecency)
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.SH
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NOTES
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.SS
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Installation:
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.P
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Put something like this in your \fB$HOME/.bashrc\fR or \fB$HOME/.zshrc\fR:
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.RS
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.P
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\fB. /path/to/z.sh\fR
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.RE
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.P
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\fBcd\fR around for a while to build up the db.
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.P
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PROFIT!!
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.P
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Optionally:
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.RS
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Set \fB$_Z_CMD\fR to change the command name (default \fBz\fR).
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.RE
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.RS
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Set \fB$_Z_DATA\fR to change the datafile (default \fB$HOME/.z\fR).
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.RE
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.RS
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Set \fB$_Z_NO_RESOLVE_SYMLINKS\fR to prevent symlink resolution.
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.RE
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.RS
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Set \fB$_Z_NO_PROMPT_COMMAND\fR to handle \fBPROMPT_COMMAND/precmd\fR yourself.
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.RE
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.RS
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Set \fB$_Z_EXCLUDE_DIRS\fR to an array of directories to exclude.
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.RE
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.RS
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(These settings should go in .bashrc/.zshrc before the lines added above.)
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.RE
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.RS
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Install the provided man page \fBz.1\fR somewhere like \fB/usr/local/man/man1\fR.
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.RE
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.SS
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Aging:
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The rank of directories maintained by \fBz\fR undergoes aging based on a simple
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formula. The rank of each entry is incremented every time it is accessed. When
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the sum of ranks is greater than 6000, all ranks are multiplied by 0.99. Entries
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with a rank lower than 1 are forgotten.
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.SS
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Frecency:
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Frecency is a portmantaeu of 'recent' and 'frequency'. It is a weighted rank
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that depends on how often and how recently something occured. As far as I
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know, Mozilla came up with the term.
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.P
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To \fBz\fR, 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 long time
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ago.
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.P
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Frecency is determined at runtime.
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.SS
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Common:
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When multiple directories match all queries, and they all have a common prefix,
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\fBz\fR will cd to the shortest matching directory, without regard to priority.
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This has been in effect, if undocumented, for quite some time, but should
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probably be configurable or reconsidered.
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.SS
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Tab Completion:
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\fBz\fR 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 the
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completion implementations, only the last argument will be completed in the
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shell.
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.P
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Internally, \fBz\fR decides you've requested a completion if the last argument
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passed is an absolute path to an existing directory. This may cause unexpected
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behavior if the last argument to \fBz\fR begins with \fB/\fR.
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.SH
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ENVIRONMENT
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A function \fB_z()\fR is defined.
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.P
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The contents of the variable \fB$_Z_CMD\fR is aliased to \fB_z 2>&1\fR. If not
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set, \fB$_Z_CMD\fR defaults to \fBz\fR.
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.P
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The environment variable \fB$_Z_DATA\fR can be used to control the datafile
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location. If it is not defined, the location defaults to \fB$HOME/.z\fR.
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.P
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The environment variable \fB$_Z_NO_RESOLVE_SYMLINKS\fR can be set to prevent
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resolving of symlinks. If it is not set, symbolic links will be resolved when
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added to the datafile.
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.P
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In bash, \fBz\fR prepends a command to the \fBPROMPT_COMMAND\fR environment
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variable to maintain its database. In zsh, \fBz\fR appends a function
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\fB_z_precmd\fR to the \fBprecmd_functions\fR array.
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.P
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The environment variable \fB$_Z_NO_PROMPT_COMMAND\fR can be set if you want to
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handle \fBPROMPT_COMMAND\fR or \fBprecmd\fR yourself.
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.P
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The environment variable \fB$_Z_EXCLUDE_DIRS\fR can be set to an array of
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directories to exclude from tracking. \fB$HOME\fR is always excluded.
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Directories must be full paths without trailing slashes.
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.SH
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FILES
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Data is stored in \fB$HOME/.z\fR. This can be overridden by setting the
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\fB$_Z_DATA\fR environment variable. When initialized, \fBz\fR will raise an
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error if this path is a directory, and not function correctly.
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.P
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A man page (\fBz.1\fR) is provided.
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.SH
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SEE ALSO
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regex(7), pushd, popd, autojump, cdargs
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.P
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Please file bugs at https://github.com/rupa/z/
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