fix(v4): remove is-svg dependency

packages/postcss-svgo/package.json

@@ -33,7 +33,6 @@
   },
   "repository": "cssnano/cssnano",
   "dependencies": {
-    "is-svg": "^3.0.0",
     "postcss": "^7.0.0",
     "postcss-value-parser": "^3.0.0",
     "svgo": "^1.0.0"

packages/postcss-svgo/src/__tests__/index.js

@@ -152,6 +152,13 @@ test(
     'h1{background-image:url("data:image/svg;charset=US-ASCII,<?xml version="1.0" encoding="utf-8"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve"><circle cx="50" cy="50" r="40" fill="yellow" /><!--test comment--></svg>")}',
 );
 
+test('should warn on SVG containing unclosed tags', async (t) => {
+    const css =
+      'h1{background:url(data:image/svg+xml;charset=utf-8,<svg>style type="text/css"><![CDATA[ svg { fill: red; } ]]></style></svg>)}';
+    const result = await postcss(plugin()).process(css, {from: undefined});
+    t.is(result.messages.length, 1);
+    t.is(result.messages[0].type, 'warning');
+});
 
 test(
     'should pass through links to svg files',
@@ -166,12 +173,6 @@ test(
     `h1{background-image: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="32" viewBox="0 0 1200 320"><path d="M137.189 140V17.17h-36.676L73.871 31.832z" fill="%23639"/></svg>');}`
 );
 
-test('should reject on malformed svgs', async t => {
-    const css = 'h1{background:url(data:image/svg+xml;charset=utf-8,<svg>style type="text/css"><![CDATA[ svg { fill: red; } ]]></style></svg>)}';
-    const error = await t.throws(postcss(plugin()).process(css));
-    t.truthy(error);
-});
-
 test('should not crash on malformed urls when encoded', t => {
     const svg = encode(file(`${__dirname}/border.svg`, 'utf-8'));
     t.notThrows(() => decode(svg));

packages/postcss-svgo/src/index.js

@@ -1,14 +1,13 @@
 import postcss from 'postcss';
 import valueParser from 'postcss-value-parser';
 import SVGO from 'svgo';
-import isSvg from 'is-svg';
 import {encode, decode} from './lib/url';
 
 const PLUGIN = 'postcss-svgo';
 const dataURI = /data:image\/svg\+xml(;((charset=)?utf-8|base64))?,/i;
 const dataURIBase64 = /data:image\/svg\+xml;base64,/i;
 
-function minifyPromise (decl, getSvgo, opts) {
+function minifyPromise (decl, getSvgo, opts, postcssResult) {
     const promises = [];
     const parsed = valueParser(decl.value);
 
@@ -44,13 +43,13 @@ function minifyPromise (decl, getSvgo, opts) {
             }
         }
 
-        if (!isSvg(svg)) {
-            return;
-        }
-
         promises.push(
             getSvgo().optimize(svg)
                 .then(result => {
+                    if (result.error) {
+                        decl.warn(postcssResult, `${result.error}`);
+                        return;
+                    }
                     let data, optimizedValue;
 
                     if (isBase64) {
@@ -75,7 +74,7 @@ function minifyPromise (decl, getSvgo, opts) {
                     });
                 })
                 .catch(error => {
-                    throw new Error(`${PLUGIN}: ${error}`);
+                    decl.warn(postcssResult, `${error}`);
                 })
         );
 
@@ -96,7 +95,7 @@ export default postcss.plugin(PLUGIN, (opts = {}) => {
         return svgo;
     };
 
-    return css => {
+    return (css, result) => {
         return new Promise((resolve, reject) => {
             const svgoQueue = [];
 
@@ -105,7 +104,7 @@ export default postcss.plugin(PLUGIN, (opts = {}) => {
                     return;
                 }
 
-                svgoQueue.push(minifyPromise(decl, getSvgo, opts));
+                svgoQueue.push(minifyPromise(decl, getSvgo, opts, result));
             });
 
             return Promise.all(svgoQueue).then(resolve, reject);

packages/postcss-svgo/yarn.lock

@@ -802,10 +802,6 @@ home-or-tmp@^2.0.0:
     os-homedir "^1.0.0"
     os-tmpdir "^1.0.1"
 
-html-comment-regex@^1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/html-comment-regex/-/html-comment-regex-1.1.1.tgz#668b93776eaae55ebde8f3ad464b307a4963625e"
-
 iconv-lite@^0.4.4:
   version "0.4.24"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
@@ -979,12 +975,6 @@ is-regex@^1.0.4:
   dependencies:
     has "^1.0.1"
 
-is-svg@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/is-svg/-/is-svg-3.0.0.tgz#9321dbd29c212e5ca99c4fa9794c714bcafa2f75"
-  dependencies:
-    html-comment-regex "^1.1.0"
-
 is-symbol@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.2.tgz#a055f6ae57192caee329e7a860118b497a950f38"