Use ImageMagick built with libwebp inside a Heroku heroku-16 environment. This buildpack will download both libraries, build them from source and install them along side your app. Your $PATH and $LD_LIBRARY_PATH will also be updated to use this version of ImageMagick instead of the default Heroku one, which does not currently have libwebp support.
Since this buildpack is building libwebp and ImageMagick from source your first deploy will take a very long time (around 10 mins). However after building once the installed libraries are stored in a cache directory and will be used for all future deploys. If for any reason you want to force a rebuild of libwebp and ImageMagick, please check out the heroku-repo plugin.
List your buildpacks:
heroku buildpacks -a appname
Add this buildpack to your app (specify hash to lock down verison):
heroku buildpacks:add https://github.com/maximusdominus/heroku-buildpack-imagemagick-webp.git#abc123 -a appname
You can verify that ImageMagick was built with libwebp support by running the following:
heroku run "identify -list format" -a appname
If the output includes WEBP* rw- WebP Image Format (libwebp 0.4.2) then you're all set.
heroku run "identify --version" -a appname
If this failed, and you want to clear the buildpack cache to try again:
heroku plugins:install heroku-repo -a appname
heroku repo:purge_cache -a appname
Then, adjust your buildpacks as necessary and re-run your deploy:
git commit --allow-empty -m "Updated buildpacks"
git push origin master
Add this buildpack to your app.json file if you're using Heroku's continuous integration / pipelines.
{
"stack": "heroku-16",
"environments": {
"test": {
"buildpacks": [
{ "url": "heroku/ruby" },
...
{ "url": "https://github.com/maximusdominus/heroku-buildpack-imagemagick-webp.git#abc123"}
],
"addons": [
...
],
"formation": {
...
},
"scripts": {
...
}
}
}
}
Only the release versions that end in -10 are available long-term from https://www.imagemagick.org/download/releases/. For example, 6.5.8-10 has been available there for years.
For the most recent versions, it's recommended to source the file elsewhere.
Copyright (c) 2014 Nick Jensen, https://nrj.io Copyright (C) 2012 Heroku, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.