mirror of https://github.com/Hilbis/Hilbish
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<!doctype html><html><head><title>Module bait — Hilbish</title><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no"><meta name=theme-color content="#ff89dd"><meta content="/Hilbish/hilbish-flower.png" property="og:image"><meta property="og:site_name" content="Hilbish"><meta content="Module bait — Hilbish" property="og:title"><meta content="the event emitter" property="og:description"><meta content="the event emitter" name=description><meta name=revisit-after content="2 days"><meta name=keywords content="Lua,Hilbish,Linux,Shell"><meta property="og:locale" content="en_GB"><link rel=canonical href=https://rosettea.github.io/Hilbish/><meta property="og:url" content="https://rosettea.github.io/Hilbish/"><link href=https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/css/bootstrap.min.css rel=stylesheet integrity=sha384-0evHe/X+R7YkIZDRvuzKMRqM+OrBnVFBL6DOitfPri4tjfHxaWutUpFmBp4vmVor crossorigin=anonymous><script src=https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/js/bootstrap.bundle.min.js integrity=sha384-pprn3073KE6tl6bjs2QrFaJGz5/SUsLqktiwsUTF55Jfv3qYSDhgCecCxMW52nD2 crossorigin=anonymous></script>
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<span class=navbar-toggler-icon></span></button><div class="collapse navbar-collapse" id=navbarSupportedContent><ul class="navbar-nav me-auto mb-2 mb-lg-0"><li class=nav-item><a href=/Hilbish/versions/fs-watch/ class=nav-link>Home</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/install/ class=nav-link>Install</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/ class=nav-link>Docs</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/blog/ class=nav-link>Blog</a></li></ul></div></div></nav></header><style>@media(min-width:768px){.sidenav{width:240px}}</style><div class=row><nav class="navbar-expand-md bg-light sidenav border-end"><div class=container><div class="collapse navbar-collapse" id=navbarSupportedContent><nav class="navbar navbar-expand-md bg-light sidenav col" style=margin-top:-20px><ul class="navbar-nav me-auto mb-2 mb-lg-0 flex-column col mt-4"><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/ class=nav-link><strong>Introduction</strong></a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/getting-started/ class=nav-link><strong>Getting Started</strong></a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/faq/ class=nav-link><strong>Frequently Asked Questions</strong></a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/features/ class=nav-link><strong>Features</strong></a></li><ul style=list-style:none><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/completions/ class=nav-link>Completions</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/features/notifications/ class=nav-link>Notification</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/features/opts/ class=nav-link>Options</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/features/runner-mode/ class=nav-link>Runner Mode</a></li></ul><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/hooks/ class=nav-link><strong>Signals</strong></a></li><ul style=list-style:none><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/hooks/command/ class=nav-link>Command</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/hooks/hilbish/ class=nav-link>Hilbish</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/hooks/signal/ class=nav-link>Signal</a></li></ul><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/lunacolors/ class=nav-link><strong>Lunacolors</strong></a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/vim-mode/ class=nav-link><strong>Vim Mode</strong></a></li><ul style=list-style:none><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/vim-mode/actions/ class=nav-link>Actions</a></li></ul><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/nature/ class=nav-link><strong>Nature</strong></a></li><ul style=list-style:none><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/nature/dirs/ class=nav-link>Module dirs</a></li></ul><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/ class=nav-link><strong>API</strong></a></li><ul style=list-style:none><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/bait/ class=nav-link>Module bait</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/commander/ class=nav-link>Module commander</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/fs/ class=nav-link>Module fs</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/hilbish/ class=nav-link>Module hilbish</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/hilbish/hilbish.aliases/ class=nav-link>Module hilbish.aliases</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/hilbish/hilbish.completion/ class=nav-link>Module hilbish.completion</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/hilbish/hilbish.editor/ class=nav-link>Module hilbish.editor</a></li><li class=nav-item><a href=/Hilbish/versions/fs-watch/docs/api/hilbish/hilbish.history/ class=nav-link>Module hilbish.history</a></li><li class=nav-item><a href
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<a href=#introduction class=heading-link><i class="fas fa-paperclip"></i></a></h3><p>Bait is the event emitter for Hilbish. Much like Node.js and
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its <code>events</code> system, many actions in Hilbish emit events.
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Unlike Node.js, Hilbish events are global. So make sure to
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pick a unique name!</p><p>Usage of the Bait module consists of userstanding
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event-driven architecture, but it’s pretty simple:
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If you want to act on a certain event, you can <code>catch</code> it.
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You can act on events via callback functions.</p><p>Examples of this are in the Hilbish default config!
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Consider this part of it:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-lua data-lang=lua><span class=line><span class=ln>1</span><span class=cl><span class=n>bait.catch</span><span class=p>(</span><span class=s1>'command.exit'</span><span class=p>,</span> <span class=kr>function</span><span class=p>(</span><span class=n>code</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>2</span><span class=cl> <span class=n>running</span> <span class=o>=</span> <span class=kc>false</span>
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</span></span><span class=line><span class=ln>3</span><span class=cl> <span class=n>doPrompt</span><span class=p>(</span><span class=n>code</span> <span class=o>~=</span> <span class=mi>0</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>4</span><span class=cl> <span class=n>doNotifyPrompt</span><span class=p>()</span>
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</span></span><span class=line><span class=ln>5</span><span class=cl><span class=kr>end</span><span class=p>)</span>
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</span></span></code></pre></div><p>What this does is, whenever the <code>command.exit</code> event is thrown,
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this function will set the user prompt.</p><h3 id=functions class=heading>Functions
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<a href=#functions class=heading-link><i class="fas fa-paperclip"></i></a></h3><table><thead><tr><th></th><th></th></tr></thead><tbody><tr><td><a href=#catch>catch(name, cb)</a></td><td>Catches an event. This function can be used to act on events.</td></tr><tr><td><a href=#catchOnce>catchOnce(name, cb)</a></td><td>Catches an event, but only once. This will remove the hook immediately after it runs for the first time.</td></tr><tr><td><a href=#hooks>hooks(name) -> table</a></td><td>Returns a table of functions that are hooked on an event with the corresponding <code>name</code>.</td></tr><tr><td><a href=#release>release(name, catcher)</a></td><td>Removes the <code>catcher</code> for the event with <code>name</code>.</td></tr><tr><td><a href=#throw>throw(name, …args)</a></td><td>Throws a hook with <code>name</code> with the provided <code>args</code>.</td></tr></tbody></table><hr><div id=catch><h4 class=heading>bait.catch(name, cb)
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<a href=#catch class=heading-link><i class="fas fa-paperclip"></i></a></h4><p>Catches an event. This function can be used to act on events.</p><h5 id=parameters class=heading>Parameters
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<a href=#parameters class=heading-link><i class="fas fa-paperclip"></i></a></h5><p><code>string</code> <strong><code>name</code></strong><br>The name of the hook.</p><p><code>function</code> <strong><code>cb</code></strong><br>The function that will be called when the hook is thrown.</p><h5 id=example class=heading>Example
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<a href=#example class=heading-link><i class="fas fa-paperclip"></i></a></h5><div class=highlight><pre tabindex=0 class=chroma><code class=language-lua data-lang=lua><span class=line><span class=ln>1</span><span class=cl><span class=n>bait.catch</span><span class=p>(</span><span class=s1>'hilbish.exit'</span><span class=p>,</span> <span class=kr>function</span><span class=p>()</span>
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</span></span><span class=line><span class=ln>2</span><span class=cl> <span class=n>print</span> <span class=s1>'Goodbye Hilbish!'</span>
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</span></span><span class=line><span class=ln>3</span><span class=cl><span class=kr>end</span><span class=p>)</span>
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</span></span></code></pre></div></div><hr><div id=catchOnce><h4 class=heading>bait.catchOnce(name, cb)
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<a href=#catchOnce class=heading-link><i class="fas fa-paperclip"></i></a></h4><p>Catches an event, but only once. This will remove the hook immediately after it runs for the first time.</p><h5 id=parameters-1 class=heading>Parameters
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<a href=#parameters-1 class=heading-link><i class="fas fa-paperclip"></i></a></h5><p><code>string</code> <strong><code>name</code></strong><br>The name of the event</p><p><code>function</code> <strong><code>cb</code></strong><br>The function that will be called when the event is thrown.</p></div><hr><div id=hooks><h4 class=heading>bait.hooks(name) -> table
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<a href=#hooks class=heading-link><i class="fas fa-paperclip"></i></a></h4><p>Returns a table of functions that are hooked on an event with the corresponding <code>name</code>.</p><h5 id=parameters-2 class=heading>Parameters
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<a href=#parameters-2 class=heading-link><i class="fas fa-paperclip"></i></a></h5><p><code>string</code> <strong><code>name</code></strong><br>The name of the hook</p></div><hr><div id=release><h4 class=heading>bait.release(name, catcher)
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<a href=#release class=heading-link><i class="fas fa-paperclip"></i></a></h4><p>Removes the <code>catcher</code> for the event with <code>name</code>.<br>For this to work, <code>catcher</code> has to be the same function used to catch<br>an event, like one saved to a variable.</p><h5 id=parameters-3 class=heading>Parameters
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<a href=#parameters-3 class=heading-link><i class="fas fa-paperclip"></i></a></h5><p><code>string</code> <strong><code>name</code></strong><br>Name of the event the hook is on</p><p><code>function</code> <strong><code>catcher</code></strong><br>Hook function to remove</p><h5 id=example-1 class=heading>Example
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<a href=#example-1 class=heading-link><i class="fas fa-paperclip"></i></a></h5><div class=highlight><pre tabindex=0 class=chroma><code class=language-lua data-lang=lua><span class=line><span class=ln>1</span><span class=cl><span class=kd>local</span> <span class=n>hookCallback</span> <span class=o>=</span> <span class=kr>function</span><span class=p>()</span> <span class=n>print</span> <span class=s1>'hi'</span> <span class=kr>end</span>
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</span></span><span class=line><span class=ln>2</span><span class=cl>
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</span></span><span class=line><span class=ln>3</span><span class=cl><span class=n>bait.catch</span><span class=p>(</span><span class=s1>'event'</span><span class=p>,</span> <span class=n>hookCallback</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>4</span><span class=cl>
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</span></span><span class=line><span class=ln>5</span><span class=cl><span class=c1>-- a little while later....</span>
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</span></span><span class=line><span class=ln>6</span><span class=cl><span class=n>bait.release</span><span class=p>(</span><span class=s1>'event'</span><span class=p>,</span> <span class=n>hookCallback</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>7</span><span class=cl><span class=c1>-- and now hookCallback will no longer be ran for the event.</span>
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</span></span></code></pre></div></div><hr><div id=throw><h4 class=heading>bait.throw(name, ...args)
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<a href=#throw class=heading-link><i class="fas fa-paperclip"></i></a></h4><p>Throws a hook with <code>name</code> with the provided <code>args</code>.</p><h5 id=parameters-4 class=heading>Parameters
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<a href=#parameters-4 class=heading-link><i class="fas fa-paperclip"></i></a></h5><p><code>string</code> <strong><code>name</code></strong><br>The name of the hook.</p><p><code>any</code> <strong><code>args</code></strong> (This type is variadic. You can pass an infinite amount of parameters with this type.)<br>The arguments to pass to the hook.</p><h5 id=example-2 class=heading>Example
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<a href=#example-2 class=heading-link><i class="fas fa-paperclip"></i></a></h5><div class=highlight><pre tabindex=0 class=chroma><code class=language-lua data-lang=lua><span class=line><span class=ln>1</span><span class=cl><span class=n>bait.throw</span><span class=p>(</span><span class=s1>'greeting'</span><span class=p>,</span> <span class=s1>'world'</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>2</span><span class=cl>
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</span></span><span class=line><span class=ln>3</span><span class=cl><span class=c1>-- This can then be listened to via</span>
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</span></span><span class=line><span class=ln>4</span><span class=cl><span class=n>bait.catch</span><span class=p>(</span><span class=s1>'gretting'</span><span class=p>,</span> <span class=kr>function</span><span class=p>(</span><span class=n>greetTo</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>5</span><span class=cl> <span class=n>print</span><span class=p>(</span><span class=s1>'Hello '</span> <span class=o>..</span> <span class=n>greetTo</span><span class=p>)</span>
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</span></span><span class=line><span class=ln>6</span><span class=cl><span class=kr>end</span><span class=p>)</span>
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</span></span></code></pre></div></div></div><div class="footer mt-auto"><p class="card-small text-muted">Want to help improve this page? <a href=https://github.com/Rosettea/Hilbish/issues/new/choose>Create an issue.</a></p></div></container></div><footer class="footer mt-auto mt-auto py-3 bg-light row border-top"><div class="col mb-3"></div><div class="col mb-3"><a href=/Hilbish class="d-flex align-items-center mb-3 link-dark text-decoration-none"><img src=/Hilbish/hilbish-logo-and-text.png alt height=48 class="d-inline-block align-text-top" style=margin-left:-20px></a><ul class="nav flex-column"><li class="nav-item mb-2"><a href=/Hilbish class="nav-link p-0 text-muted">Home</a></li><li class="nav-item mb-2"><a href=/Hilbish/docs/faq class="nav-link p-0 text-muted">FAQ</a></li><li class="nav-item mb-2"><a href=https://github.com/Rosettea/Hilbish class="nav-link p-0 text-muted">Source</a></li><li class="nav-item mb-2"><a href=https://github.com/Rosettea/Hilbish/releases class="nav-link p-0 text-muted">Releases</a></li><li class="nav-item mb-2"><a href=/Hilbish/docs class="nav-link p-0 text-muted">Documentation</a></li></ul></div><div class="col mb-3"></div><div class="col mb-3"></div><div class="col mb-3"></div><div class="col mb-3"><p class="text-muted mt-4">Rosettea © 2022-2023<br>Made with <i class="fa-solid fa-heart" style=color:#f6345b></i></p></div><div class="col mb-3"></div></footer></body></html>
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