Minor man-pages improvements

Thanks to Anton Lindqvist (anton at basename.se) for spotting.

Replace item identifiers with message digests

A feed, found in the wild, highlighted a software defect: multiple feed entry having the same entry IDs could not be individually handled.

Entries will be no longer uniquely identified by the GUID or Link, rather by the SHA-1 digest of the concatenation of a few entry fields. The current selection of fields are Title, GUID, Link and Publishing Date.

To obtain the digest we rely on libcrypto.

Dropped crossbow-upgrade(1).

Various minor bugfixes and code and testing improvements.

All feed properties that were previously set via crossbow-set(1) are now defined by a configuration file. The configuration is searched in ~/.crossbow.conf, ${XDG_CONFIG_HOME}/crossbow.conf and ~/.config/crossbow.conf

Unified all binaries into one

Having a configuration file allows to have a single binary named crossbow(1), since all other binaries were just required to access the feeds configurations.

New persist file format

In previous versions of crossbow, the feed updates were tracked in the same files as the configuration. Since the feed configuration now lives in the configuration file, the feed persistence file is used uniquely to store updates.

Merged 'print' and 'pretty' logics

Granted that 'pretty' is just a glorified 'print' that should use a special format.

Many minor improvements

Updated man pages

The libeccio library implements a simple abstraction over RSS and Atom formats. It has been written by the author of Crossbow (yours truly) for the purpose of replacing libmrss in crossbow.

Some of the printf-like placeholders have been removed, in accordance to the fields that are not available in libeccio. They might be added again in the future if deemed useful or requested.

The check for entry uniqueness changed slightly. On the first execution after upgrade, under certain conditions, previously processed entries might end up processed again.

libeccio supports the content:encoding extension of RSS. The library can also deal with nested XML. Retrieved content is more likely to contain the full article, which might however end up being HTML-encoded.

See crossbow.conf(5) and crossbow-format(5) for specific details on what changed.

The libeccio library is available online at https://dacav.org/projects/libeccio/

Dropped GNU GPL license in favour of ISC.

Improved functional testing and general quality.

The crossbow-fetch(1) command supports dry-run modes (-d and -D) and a catch-up mode (-c).

Man pages refinements

Other general improvements and bug fixes

Fixed compilation under Darwin

Use pledge(2) under OpenBSD - contrib. Anton Lindqvist anton@basename.se

General improvement and bug fixes

Fix a regression introduced with verison 1.2.0. The new download procedure relies on libmrss accessing the downloaded feed via /dev/fd/. This doesn't work on FreeBSD and OpenBSD, where these files are implemented as character devices.

Thanks to Anton Lindqvist (anton at basename.se) for spotting.

The main focus of this release is the introduction of feed groups.

It is now possible to declare one or more groups in the configuration file to list shared feed properties. Individual feeds can inherit these properties of one or more feed groups, reducing redundancy in configurations. The configuration remains backwards compatible.

See crossbow.conf(5) for specific details.

Minor changes

The release includes a few minor fixes and improvements, mostly related to the configuration file parsing and to the build system.

So far, Crossbow relied on the mrss_parse_url call for parsing remote feeds. Now Crossbow directly uses libcurl, providing libmrss with a locally downloaded file instead.

This modification allows Crossbow to be in control of the HTTP/HTTPS calls configuration, opening up for future developments.

The crossbow-fetch(1) command now supports parallel download jobs (-j).

WARNING: this modification requires libcurl >= 7.66.0, which is not currenlty available in some systems (e.g. Debian stable). A backport is feasible, so contact the developer (dacav at fastmail dot com) in case of need.

Minor build system improvements

Minor code improvements