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122 lines
3.4 KiB
Markdown
122 lines
3.4 KiB
Markdown
# scd - smart change of directory
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Define `scd` shell function for changing to any directory with
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a few keystrokes.
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`scd` keeps history of the visited directories, which serves as an index of
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the known paths. The directory index is updated after every `cd` command in
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the shell and can be also filled manually by running `scd -a`. To switch to
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some directory, `scd` needs few fragments of the desired path to match with
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the index. A selection menu is displayed in case of several matches, with a
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preference given to recently visited paths. `scd` can create permanent
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directory aliases, which appear as named directories in zsh session.
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## INSTALLATION
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For oh-my-zsh, add `scd` to the `plugins` array in the ~/.zshrc file as in the
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[template file](../../templates/zshrc.zsh-template#L45).
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Besides zsh, `scd` can be used with *bash*, *dash* or *tcsh*
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shells and is also available as [Vim](http://www.vim.org/) plugin and
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[IPython](http://ipython.org/) extension. For installation details, see
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https://github.com/pavoljuhas/smart-change-directory.
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## SYNOPSIS
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```sh
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scd [options] [pattern1 pattern2 ...]
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```
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## OPTIONS
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<dl><dt>
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-a, --add</dt><dd>
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add specified directories to the directory index.</dd><dt>
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--unindex</dt><dd>
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remove specified directories from the index.</dd><dt>
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-r, --recursive</dt><dd>
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apply options <em>--add</em> or <em>--unindex</em> recursively.</dd><dt>
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--alias=ALIAS</dt><dd>
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create alias for the current or specified directory and save it to
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<em>~/.scdalias.zsh</em>.</dd><dt>
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--unalias</dt><dd>
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remove ALIAS definition for the current or specified directory from
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<em>~/.scdalias.zsh</em>.</dd><dt>
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--list</dt><dd>
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show matching directories and exit.</dd><dt>
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-v, --verbose</dt><dd>
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display directory rank in the selection menu.</dd><dt>
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-h, --help</dt><dd>
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display this options summary and exit.</dd>
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</dl>
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## Examples
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```sh
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# Index recursively some paths for the very first run
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scd -ar ~/Documents/
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# Change to a directory path matching "doc"
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scd doc
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# Change to a path matching all of "a", "b" and "c"
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scd a b c
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# Change to a directory path that ends with "ts"
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scd "ts(#e)"
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# Show selection menu and ranking of 20 most likely directories
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scd -v
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# Alias current directory as "xray"
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scd --alias=xray
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# Jump to a previously defined aliased directory
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scd xray
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```
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# FILES
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<dl><dt>
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~/.scdhistory</dt><dd>
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time-stamped index of visited directories.</dd><dt>
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~/.scdalias.zsh</dt><dd>
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scd-generated definitions of directory aliases.</dd>
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</dl>
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# ENVIRONMENT
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<dl><dt>
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SCD_HISTFILE</dt><dd>
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path to the scd index file (by default ~/.scdhistory).</dd><dt>
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SCD_HISTSIZE</dt><dd>
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maximum number of entries in the index (5000). Index is trimmed when it
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exceeds <em>SCD_HISTSIZE</em> by more than 20%.</dd><dt>
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SCD_MENUSIZE</dt><dd>
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maximum number of items for directory selection menu (20).</dd><dt>
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SCD_MEANLIFE</dt><dd>
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mean lifetime in seconds for exponential decay of directory
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likelihood (86400).</dd><dt>
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SCD_THRESHOLD</dt><dd>
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threshold for cumulative directory likelihood. Directories with
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a lower likelihood compared to the best match are excluded (0.005).
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</dd><dt>
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SCD_SCRIPT</dt><dd>
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command script file where scd writes the final <code>cd</code>
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command. This variable must be defined when scd runs in its own
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process rather than as a shell function. It is up to the
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scd caller to use the output in <em>SCD_SCRIPT</em>.</dd>
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</dl>
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