ETC-dl - Download Dagens ETC
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Copyright (c) 2018-2019  Albin Söderqvist
License: GNU GPLv3 or, at your option, any later version.
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What and how?
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When you subscribe to the digital edition of Dagens ETC
(see https://www.etc.se), you receive a URL that starts with
"http://gantrack5.com/".  If you open this in a web browser,
the URL of the actual issue is displayed with some added
nonsense.

ETC-dl tries to generate a clean HTTPS URL to the current,
a previous or even a future issue my means of date arithmetic,
and then download it using libcurl.  Run the program with the
-h option for complete usage information.

The program can be compiled for at least GNU/Linux, macOS
and Windows/Cygwin without modifications.


Compilation and installation
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1. Install a curl development package, e.g.
   libcurl4-gnutls-dev or libcurl4-openssl-dev
   on Debian GNU/Linux and derivatives or libcurl-devel
   on Windows/Cygwin

2. Run make

3. Move the single binary to your path, e.g.
   # mv etc-dl /usr/local/bin/


Configuration
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The program will create a configuration file that should
contain the last known date and issue.  In Windows/Cygwin,
it will be created as "config.txt" in the same directory as
the binary.  Otherwise, it will be created as "~/.config/
etc-dl/config".


Known limitations
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Problems may arise
  1) if Dagens ETC unexpectedly changes the issue number;
  2) if the URL should take a different form;
  3) if URL access should be blocked.

The first can be fixed by manually updating the config file.
The second problem may also be fixable but requires
development. In the third case, I believe the program
becomes useless.


Final words
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If you read Dagens ETC, please support them by subscribing.