This command line application recursively reads all of the images from the supplied directory of images (gps_images/), extracts their EXIF GPS data (longitude and latitude), and then writes the name of that image and any GPS co-ordinates it finds to a CSV file.

It allows the user to pass two optional fields: a directory and what type of file the info will be written, CSV or HTML.

This app was created using Thor.Thor is a very robust toolkit for creating command line interfaces and I thought this could be the perfect opportunity to use it. At my previous company, we used Thor to create a CLI for orchestrating our Kubernetes clusters. It's easy to expand it and really fun to use.

The dependencies for this app are Exif, the fastest Ruby EXIF reader, and Builder, a simple way to create XML markup and data structures.

This project depends on libexif. If you're on a mac, run brew install libexif to install it.

This project assumes you have a ruby environment setup in your machine, like having a ruby version and Bundler installed. If that's the case, you can skip these 3 first commands.

To install ruby and Bundler, please run these steps:

• install ruby, setting the version to 2.6.1

• install Bundler running gem install bundler

• run bundle install

This gem has not been released, so in order to run it locally, follow these steps:

1 - git clone [email protected]:stefannibrasil/lendesk.git

2 - cd lendesk && bin/setup to install dependencies.

3 - rake install to install this gem onto your local machine.

app export

Running the command above will scan the default directory (folder gps_images/) and generates an CSV file with the Exif data.

This command can also be run with two optional flags:

-d - alias for optional directory, where the app will get the images

-o - alias for optional output_type, which can be csv or html

To export the exif data from all images in folder gps_images as html, run:

app export -d gps_images -o html

To export as csv, run:

app export -d gps_images -o csv

Both these commands will save the output on folder /output/. To see the output files, run cat output/*.*.

Tip: app help export provides a full description of the export task, including its optional parameters.

Tips[1]: try running thor for seeing all features of Thor.

The latitude and longitude output values are in the EXIF format. EXIF stores GPS coords as rational64u that can be read like:

[(50/1), (137/25), (0/1)] => Lat: 50° 137.25' 0"

[(122/1), (2837/50), (0/1)]</td> => Lng: 122° 2837.50' 0"

run rake test

• Add more tests
• Convert gps degrees into coordinates
• Use Design Patterns for having a more reusable code