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Diffstat (limited to 'misc')
| -rw-r--r-- | misc/fish.html | 146 |
1 files changed, 142 insertions, 4 deletions
diff --git a/misc/fish.html b/misc/fish.html index ccf5a0f..1e9787e 100644 --- a/misc/fish.html +++ b/misc/fish.html @@ -149,14 +149,152 @@ <div id="content" class="content"> <main> <h1><a class="header" href="#fish1" id="fish1">fish(1)</a></h1> -<h2><a class="header" href="#keymaps" id="keymaps">keymaps</a></h2> -<pre><code class="language-markdown"> Shift-Tab ........... tab-completion with search +<h2><a class="header" href="#quick-info" id="quick-info">Quick Info</a></h2> +<p>Fish initialization file <code>~/.config/fish/config.fish</code></p> +<p>Switch between different key bindings:</p> +<ul> +<li><code>fish_default_key_bindings</code> to use default key bindings</li> +<li><code>fish_vi_key_bindings</code> to use vi key bindings</li> +</ul> +<h2><a class="header" href="#variables" id="variables">Variables</a></h2> +<p>Available scopes</p> +<ul> +<li><code>local</code> variable local to a block</li> +<li><code>global</code> variable global to shell instance</li> +<li><code>universal</code> variable universal to all shell instances + preserved across +shell restart</li> +</ul> +<h3><a class="header" href="#setunset-variables" id="setunset-variables">Set/Unset Variables</a></h3> +<pre><code class="language-text">set <name> [<values>] + -l local scope + -g global scope + -U universal scope + -e erase variable + -S show verbose info + -x export to ENV + -u unexport from ENV +</code></pre> +<h3><a class="header" href="#lists" id="lists">Lists</a></h3> +<p>In <code>fish</code> all variables are lists (start with index <code>1</code>, but lists can't +contain lists.</p> +<pre><code class="language-text">set foo a b c d + +echo $foo[1] # a +echo $foo[-1] # d +echo $foo[2..3] # b c +echo $foo[1 3] # a c +</code></pre> +<p><code>$</code> can be seen as dereference operator.</p> +<pre><code class="language-text">set foo a; set a 1337 +echo $$foo # outputs 1337 +</code></pre> +<p>Cartesian product.</p> +<pre><code class="language-text">echo file.{h,cc} +# file.h file.cc + +echo {a,b}{1,2} +# a1 b1 b2 +</code></pre> +<h3><a class="header" href="#special-variables-lists" id="special-variables-lists">Special Variables (Lists)</a></h3> +<pre><code class="language-text">$status # exit code of last command +$pipestatus # list of exit codes of pipe chain + +$CMD_DURATION # runtime of last command in ms +</code></pre> +<h4><a class="header" href="#path" id="path"><code>*PATH</code></a></h4> +<p>Lists ending with <code>PATH</code> are automatically split at <code>:</code> when used and joined +with <code>:</code> when exported to the environment.</p> +<pre><code class="language-text">set -x BLA_PATH a:b:c:d +echo $BLA_PATH # a b c d +env | grep BLA_PATH # BLA_PATH=a:b:c:d +</code></pre> +<h2><a class="header" href="#command-handling" id="command-handling">Command Handling</a></h2> +<pre><code class="language-text"># sub-commands are not run in quotes +echo "ls output: "(ls) +</code></pre> +<h3><a class="header" href="#io-redirection" id="io-redirection">I/O redirection</a></h3> +<pre><code class="language-text"># 'noclobber', fail if 'log' already exists +echo foo >? log +</code></pre> +<h2><a class="header" href="#control-flow" id="control-flow">Control Flow</a></h2> +<h3><a class="header" href="#if--else" id="if--else"><code>if</code> / <code>else</code></a></h3> +<pre><code class="language-text">if grep foo bar + # do sth +else if grep foobar bar + # do sth else +else + # do sth else +end +</code></pre> +<h3><a class="header" href="#switch" id="switch"><code>switch</code></a></h3> +<pre><code class="language-text">switch (echo foo) +case 'foo*' + # do start with foo +case bar dudel + # do bar and dudel +case '*' + # do else +end +</code></pre> +<h3><a class="header" href="#while-loop" id="while-loop"><code>while</code> Loop</a></h3> +<pre><code class="language-text">while true + echo foo +end +</code></pre> +<h3><a class="header" href="#for-loop" id="for-loop"><code>for</code> Loop</a></h3> +<pre><code class="language-text">for f in (ls) + echo $f +end +</code></pre> +<h2><a class="header" href="#functions" id="functions">Functions</a></h2> +<p>Function arguments are passed via <code>$argv</code> list.</p> +<pre><code class="language-text">function fn_foo + echo $argv +end +</code></pre> +<h3><a class="header" href="#autoloading" id="autoloading">Autoloading</a></h3> +<p>When running a command fish attempts to autoload a function. The shell looks +for <code><cmd>.fish</code> in the locations defined by <code>$fish_function_path</code> and loads +the function lazily if found.</p> +<p>This is the preferred way over monolithically defining all functions in a +startup script.</p> +<h3><a class="header" href="#helper" id="helper">Helper</a></h3> +<pre><code class="language-text">functions # list al functions +functions foo # describe function 'foo' +functions -e foo # erase function 'foo' + +funced foo # edit function 'foo' + # '-e vim' to edit in vim +</code></pre> +<h2><a class="header" href="#prompt" id="prompt">Prompt</a></h2> +<p>The prompt is defined by the output of the <code>fish_prompt</code> function.</p> +<pre><code class="language-text">function fish_prompt + set -l cmd_ret + echo "> "(pwd) $cmd_ret" " +end +</code></pre> +<blockquote> +<p>Use <code>set_color</code> to manipulate terminal colors.</p> +</blockquote> +<h2><a class="header" href="#useful-builtins" id="useful-builtins">Useful Builtins</a></h2> +<pre><code class="language-text"># history +history search <str> # search history for <str> +history merge # merge histories from fish sessions + +# list +count $var # count elements in list + +# string +string split SEP STRING +</code></pre> +<h2><a class="header" href="#keymaps" id="keymaps">Keymaps</a></h2> +<pre><code class="language-text"> Shift-Tab ........... tab-completion with search Alt-Up / Alt-Down ... search history with token under the cursor Alt-l ............... list content of dir under cursor Alt-p ............... append '2>&1 | less;' to current cmdline </code></pre> -<h2><a class="header" href="#debug" id="debug">debug</a></h2> -<pre><code class="language-markdown"> status print-stack-trace .. prints function stacktrace (can be used in scripts) +<h2><a class="header" href="#debug" id="debug">Debug</a></h2> +<pre><code class="language-text"> status print-stack-trace .. prints function stacktrace (can be used in scripts) breakpoint ................ halt script execution and gives shell (C-d | exit to continue) </code></pre> |