feat: use integrity field from yarn.lock as sha512 for nix derivation

Based off canva-public#11

Author: andrew-vts

lib/print.js

@@ -158,6 +158,7 @@ class Package {
    *    type: 'url',
    *    url: string,
    *    sha1?: string,
+   *    sha512?: string,
    *   } | {
    *    type: 'local',
    *   },
@@ -201,7 +202,7 @@ class Package {
   static create(
     pkgInfo,
     // @ts-ignore because there is no optionalDependencies in the type
-    { version, resolved, dependencies = {}, optionalDependencies = {} }
+    { version, integrity, resolved, dependencies = {}, optionalDependencies = {} }
   ) {
     const { scope = '', name } = Id.parse(pkgInfo.name);
 
@@ -211,11 +212,17 @@ class Package {
       const parsedUrl = new URL(resolved);
       // prettier-ignore
       if (['registry.yarnpkg.com', 'registry.npmjs.org'].includes(parsedUrl.host)) {
+        const sha1 = parsedUrl.hash.slice(1);
+        const sha512 = integrity;
         src = {
-          sha1: parsedUrl.hash.slice(1), // cut off the first ('#') character
           url: parsedUrl.origin + parsedUrl.pathname,
           type: 'url',
         };
+        if (sha512 != '') {
+          src.sha512 = sha512;
+        } else if (sha1 != '') {
+          src.sha1 = sha1;
+        }
       } else {
         src = {
           sha1: undefined, // We don't provide sha in order to force to override it manually
@@ -306,7 +313,9 @@ class Package {
   renderSrc() {
     switch (this.src.type) {
       case 'url':
-        const { url, sha1 } = this.src;
+        const { url, sha1, sha512 } = this.src;
+        const hashKey = sha512 ? "sha512" : "sha1"
+        const hashValue = sha512 || sha1
         // Some of the urls can look like "https://codeload.github.com/xolvio/cucumber-js/tar.gz/cf953cb5b5de30dbcc279f59e4ebff3aa040071c",
         // i.e. no extention given. That's why Nix unable to recognize the type of archive so we need to have
         // name specified explicitly to all Nix to infer the archive type.
@@ -339,12 +348,7 @@ class Package {
             : ''
         }
       url = "${url}";
-      ${
-        sha1
-          ? `sha1 = "${sha1}"`
-          : `sha256 = abort ''
-
-
+      ${hashKey} = ${`"${hashValue}"` || `abort ''
         Failed to infer \`sha256\` hash of the \`${this.renderKey()}\` package source from
         \`${url}\`.