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    <title>DEV Community: kthjm</title>
    <description>The latest articles on DEV Community by kthjm (@kthjm).</description>
    <link>https://dev.to/kthjm</link>
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      <title>DEV Community: kthjm</title>
      <link>https://dev.to/kthjm</link>
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    <item>
      <title>Workspaces and Rollup</title>
      <dc:creator>kthjm</dc:creator>
      <pubDate>Thu, 20 Dec 2018 05:33:19 +0000</pubDate>
      <link>https://dev.to/kthjm/workspaces-and-rollup-1ofk</link>
      <guid>https://dev.to/kthjm/workspaces-and-rollup-1ofk</guid>
      <description>&lt;p&gt;How to resolve modules located in workspaces by rollup.&lt;/p&gt;

&lt;p&gt;situation is:&lt;br&gt;
&lt;code&gt;workspace-a&lt;/code&gt; and &lt;code&gt;workspace-b&lt;/code&gt; that contain modules are set in &lt;code&gt;"workspaces"&lt;/code&gt;.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// package.json&lt;/span&gt;
&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;private&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="kc"&gt;true&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;workspaces&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;
  &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;workspace-a/*&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="c1"&gt;// workspace-a/[module]/package.json&lt;/span&gt;
  &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;workspace-b/*&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;
&lt;span class="p"&gt;],&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;



&lt;p&gt;To resolve the modules, pass the directories to &lt;code&gt;rollup-plugin-node-resolve&lt;/code&gt; via &lt;code&gt;customResolveOptions.moduleDirectory&lt;/code&gt;.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// rollup.config.js&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;Resolve&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;rollup-plugin-node-resolve&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;

&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;resolve&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;Resolve&lt;/span&gt;&lt;span class="p"&gt;({&lt;/span&gt;
  &lt;span class="na"&gt;customResolveOptions&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="na"&gt;moduleDirectory&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt; &lt;span class="c1"&gt;// as array&lt;/span&gt;
      &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;workspace-a&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
      &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;workspace-b&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
    &lt;span class="p"&gt;]&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;})&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;



&lt;p&gt;And it is necessary that [module]'s dirname equals to its &lt;code&gt;"name"&lt;/code&gt; in package.json.&lt;/p&gt;




&lt;p&gt;There may be the way more smart, this is just a solution.😗&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;&lt;a href="https://rollupjs.org/guide/en"&gt;rollup&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href="https://github.com/rollup/rollup-plugin-node-resolve"&gt;rollup-plugin-node-resolve&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href="https://yarnpkg.com/lang/en/docs/workspaces/"&gt;workspaces&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;

</description>
      <category>node</category>
      <category>programming</category>
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      <category>monorepo</category>
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