A buildpack that adds timestamps and durations to the logs output by Heroku builds, as a lightweight means of timing/profiling slow builds.
This buildpack does not replace your existing buildpack(s) but instead is added alongside them. It must be placed first in the buildpack list.
To do this:
- Ensure the Heroku CLI is installed and up to date.
cd <path/to/your/app>
- Check your app has an existing buildpack already configured, using:
heroku buildpacks
- Insert this buildpack before all others, using:
heroku buildpacks:add --index=1 edmorley/timestamps
The next time your app is built, each line of the build logs will be prefixed with timestamps, and a duration shown at the end of each buildpack's compile.
For more information on buildpacks and how to configure them, see the Heroku buildpack documentation.
-----> Timestamp app detected
-----> Node.js app detected
2018-10-01 20:30:59
2018-10-01 20:30:59 -----> Creating runtime environment
2018-10-01 20:30:59
2018-10-01 20:30:59 NPM_CONFIG_LOGLEVEL=error
2018-10-01 20:30:59 YARN_PRODUCTION=true
2018-10-01 20:30:59 NODE_ENV=production
2018-10-01 20:30:59 NODE_MODULES_CACHE=true
2018-10-01 20:30:59 NODE_VERBOSE=false
2018-10-01 20:30:59
2018-10-01 20:30:59 -----> Installing binaries
2018-10-01 20:30:59 engines.node (package.json): 10.11.0
2018-10-01 20:30:59 engines.npm (package.json): unspecified (use default)
2018-10-01 20:30:59 engines.yarn (package.json): 1.11.1
2018-10-01 20:30:59
2018-10-01 20:30:59 Resolving node version 10.11.0...
2018-10-01 20:31:00 Downloading and installing node 10.11.0...
2018-10-01 20:31:01 Using default npm version: 6.4.1
2018-10-01 20:31:01 Resolving yarn version 1.11.1...
2018-10-01 20:31:01 Downloading and installing yarn (1.11.1)...
2018-10-01 20:31:02 Installed yarn 1.11.1
2018-10-01 20:31:03
2018-10-01 20:31:03 -----> Restoring cache
2018-10-01 20:31:03 - node_modules
2018-10-01 20:31:05
2018-10-01 20:31:05 -----> Building dependencies
2018-10-01 20:31:06 Installing node modules (yarn.lock)
2018-10-01 20:31:07 yarn install v1.11.1
2018-10-01 20:31:08 success Already up-to-date.
2018-10-01 20:31:08 Done in 1.16s.
2018-10-01 20:31:08
2018-10-01 20:31:08 -----> Caching build
2018-10-01 20:31:08 - node_modules
2018-10-01 20:31:15
2018-10-01 20:31:15 -----> Pruning devDependencies
2018-10-01 20:31:15 Skipping because YARN_PRODUCTION is 'true'
2018-10-01 20:31:15
2018-10-01 20:31:15 -----> Build succeeded!
2018-10-01 20:31:15 -----> Buildpack compile completed in 16s
This buildpack wraps later buildpack's compile steps, by temporarily shadowing
the real bash
on PATH
. As such, the other buildpack's compile steps must use
the shebang #!/usr/bin/env bash
rather than #!/bin/bash
, or their log output
will not be wrapped.
Official buildpacks known to be compatible:
Official buildpacks that are not yet compatible:
There is heroku-buildpack-timings, however it requires moving the buildpack configuration to the deprecated heroku-buildpack-multi, rather than being able to use Heroku's native multi-buildpack support.