Build error UglifyJS (with cross-spawn)

[LekoArts]

Description

I'm using cross-spawn for one of my fields.

I get the error:

 Error: commons-ab523a7593dd80499e4a.js from UglifyJs
  SyntaxError: Unexpected character '`' [./~/cross-spawn/lib/enoent.js:6,0]

Steps to reproduce

Can't provide a sample repo. But I looked at other cases:
https://github.com/gatsbyjs/gatsby/issues?utf8=%E2%9C%93&q=uglifyjs

Expected result

Build should finish successfully.

Actual result

Error above.

Environment

System:
OS: Windows 10
CPU: x64 Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz
Binaries:
Yarn: 1.7.0 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 5.10.0 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: 42.17134.1.0
npmPackages:
gatsby: ^1.9.270 => 1.9.270
gatsby-image: ^1.0.52 => 1.0.52
gatsby-link: ^1.6.44 => 1.6.44
gatsby-plugin-catch-links: ^1.0.22 => 1.0.22
gatsby-plugin-emotion: ^1.1.17 => 1.1.17
gatsby-plugin-lodash: ^1.0.11 => 1.0.11
gatsby-plugin-manifest: ^1.0.25 => 1.0.25
gatsby-plugin-netlify: ^1.0.21 => 1.0.21
gatsby-plugin-offline: ^1.0.18 => 1.0.18
gatsby-plugin-react-helmet: ^2.0.11 => 2.0.11
gatsby-plugin-react-next: ^1.0.11 => 1.0.11
gatsby-plugin-sharp: ^1.6.47 => 1.6.47
gatsby-plugin-sitemap: ^1.2.25 => 1.2.25
gatsby-plugin-typography: ^1.7.18 => 1.7.18
gatsby-remark-autolink-headers: ^1.4.18 => 1.4.18
gatsby-remark-design-system: ^1.0.9 => 1.0.9
gatsby-remark-external-links: ^0.0.4 => 0.0.4
gatsby-remark-prismjs: ^2.0.3 => 2.0.3
gatsby-source-filesystem: ^1.5.38 => 1.5.38
gatsby-transformer-remark: ^1.7.42 => 1.7.42
gatsby-transformer-sharp: ^1.6.26 => 1.6.26

File contents (if changed)

gatsby-node

const path = require('path');
const { createFilePath } = require('gatsby-source-filesystem');
const { toTitleCase, getLastUpdatedTimestamp } = require('./src/utilities');

const getSlugParents = slug => {
  const slugParentString = slug.substring(1, slug.length - 1);
  return slugParentString.split('/');
};

exports.onCreateNode = ({ node, getNode, boundActionCreators }) => {
  const { createNodeField } = boundActionCreators;

  if (node.internal.type === 'MarkdownRemark') {
    const slug = createFilePath({ node, getNode, basePath: 'pages' });
    const slugParentsArr = getSlugParents(slug);

    createNodeField({
      node,
      name: 'slug',
      value: slug,
    });

    createNodeField({
      node,
      name: 'topLevelDir',
      value: toTitleCase(slugParentsArr[0]),
    });

    createNodeField({
      node,
      name: 'subDir',
      value: toTitleCase(slugParentsArr.length > 2 ? slugParentsArr[1] : ''),
    });
  }
};

exports.createPages = ({ graphql, boundActionCreators }) => {
  const { createPage } = boundActionCreators;

  return new Promise((resolve, reject) => {
    const docPage = path.resolve('src/templates/doc.jsx');
    resolve(
      graphql(`
        {
          docs: allMarkdownRemark {
            edges {
              node {
                fileAbsolutePath
                fields {
                  slug
                  topLevelDir
                  subDir
                }
                frontmatter {
                  title
                }
              }
            }
          }
        }
      `).then(result => {
        if (result.errors) {
          console.log(result.errors);
          reject(result.errors);
        }

        const docsList = result.data.docs.edges;

        docsList.forEach(project => {
          createPage({
            path: project.node.fields.slug,
            component: docPage,
            context: {
              slug: project.node.fields.slug,
              topLevelDir: project.node.fields.topLevelDir,
              subDir: project.node.fields.subDir,
              lastUpdated: getLastUpdatedTimestamp(project.node.fileAbsolutePath),
            },
          });
        });
      })
    );
  });
};

exports.modifyWebpackConfig = ({ config, stage }) => {
  config.merge({
    node: { fs: 'empty', child_process: 'empty' },
    resolve: {
      root: path.resolve(config._config.context, 'src'),
    },
  });

  return config;
};

getLastUpdatedTimestamp:

const spawn = require('cross-spawn');

exports.getLastUpdatedTimestamp = filepath =>
  parseInt(spawn.sync('git', ['log', '-1', '--format=%ct', filepath]).stdout.toString('utf-8'), 10) * 1000;

[m-allanson]

Is this another instance of #3780?

[LekoArts]

@m-allanson Maybe... But isn't the mentioned line es5?
https://github.com/moxystudio/node-cross-spawn/blob/master/lib/enoent.js

Follow-up question: Are the changes mentioned by Kyle in the linked issue implemented?

[LekoArts]

Since Gatsby v2 solves all my issues with that I'm closing this one.