How to add git hash to Vue.js Component

Question

I want to create a vue.js component which will display the package.json version number and hash of most recent git commit. Here is the code so far:

<template>
  <div class="versionLabel">Version: {{version}} (HASH)</div>
</template>

<script lang="ts">
import { Component, Prop, Vue } from 'vue-property-decorator';
import { version } from '../../package.json';

@Component
export default class VersionLabel extends Vue {
  get version() {
    return version;
  }
}
</script>

<style scoped lang="scss">
div {
  background-color: rgb(60, 172, 60);
  color: lightgray;
}
</style>

I am deploying to Heroku using the commands

"postinstall": "if test \"$NODE_ENV\" = \"production\" ; then npm run build ; fi ",
"start": "node server.js",

in package.json and this simple server:

const express = require('express');
const serveStatic = require("serve-static")

app = express();
app.use(serveStatic(__dirname + '/dist'));

const port = process.env.PORT || 5000;
app.listen(port);

The version number is working (Although suggestions for improvement are welcome) but how can I add the git hash in place of HASH?

Answer 1

Install git-describe as a dev dependency (e.g. yarn add --dev git-describe).

In vue.config.js add:

const {gitDescribe, gitDescribeSync} = require('git-describe');
process.env.VUE_APP_GIT_HASH = gitDescribeSync().hash

Now, in every component, we have process.env.VUE_APP_GIT_HASH variable.

Here is how I added it to my app: https://github.com/Quantum-Game/quantum-game-2/pull/164 (with some discussion).

Other approaches

There are other approaches, e.g. using git-revision-webpack-plugin (example for the Vue forum):

const GitRevisionPlugin = require('git-revision-webpack-plugin')

module.exports = {
  'chainWebpack': config => {
    config.plugin('define').tap(args => {
      const gitRevisionPlugin = new GitRevisionPlugin()
      args[0]['process.env']['VUE_APP_COMMIT_HASH'] = JSON.stringify(gitRevisionPlugin.commithash())
      return args
    })
  }
}

Another way is to use git directly, with child-process.

See also

• Including git commit hash and date in webpack build
• Get hash of most recent git commit in Node
• Git log output to XML, JSON, or YAML?