If you want to get the path of a file relative to another, you can use the expand_path method with either the constant __FILE__ or the method __dir__. Read this card for more information about __FILE__ and __dir__.

Example

Structure:

.
├── bin
│   ├── format_changelog
├── CHANGELOG.md

bin/format_changelog:

#!/usr/bin/env ruby

changelog_path = ? # How to get the path to ../CHANGELOG.md independent of the working dir of the caller
changelog = File.read(changelog_path)

# ... further actions here

Ruby >= 2.0

changelog_path = File.expand_path('../CHANGELOG.md', __dir__)

Ruby < 2.0

changelog_path = File.expand_path('../../CHANGELOG.md', __FILE__)

Rails

changelog_path = Rails.root.join('CHANGELOG.md')

Emanuel

makandra.de

Say thanks1

Last edit

2020-09-28

Emanuel

License

Source code in this card is licensed under the MIT License.

Delivering Carrierwave attachments to authorized users only

Preparation

To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>) with the following content:

class AddAttachmentToNotes...

Async control flow in JavaScript: Promises, Microtasks, async/await

Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('s...

Posted by Emanuel to makandra dev (2020-09-18 06:39)

Ruby: How to determine the absolute path relative to a file