A RSS to email, ala rss2email written in Go.

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Goeland excels at creating beautiful emails from RSS, tailored for daily or weekly digest.

It include a number of filters (see below) that can transform the RSS content along the way. It can also consume other sources, such as a Imgur tag.

Goeland transforms this...

<rss version="2.0">
<channel>
<title>Phoronix</title>
<link>https://www.phoronix.com/</link>
<description>
Linux Hardware Reviews, Benchmarks & Open-Source News
</description>
<language>en-us</language>
<item>
<title>
Google Announces KataOS As Security-Focused OS, Leveraging Rust & seL4 Microkernel
</title>
<link>https://www.phoronix.com/news/Google-KataOS</link>
<guid>https://www.phoronix.com/news/Google-KataOS</guid>
<description>
Google this week has announced the release of KataOS as their newest operating system effort focused on embedded devices running ambient machine learning workloads. KataOS is security-minded, exclusively uses the Rust programming language, and is built atop the seL4 microkernel as its foundation...
</description>
<pubDate>Sun, 16 Oct 2022 06:10:25 -0400</pubDate>
</item>
</rss>

into this

Goeland has a size-fits-all default template that works well with mobile, tablet, desktop and webmail clients.

Goeland can extract full text from most articles sources, enabling a ready to consume email.

Goeland is used in production with many email clients, and has sent over thousands of email. It is considered stable.

Grab the latest binary release from the release page. Binaries are available for the following platforms:

• linux/386
• linux/amd64
• linux/arm
• linux/arm64
• darwin/amd64
• windows/amd64
• windows/386

Just put it in a folder where you have write permissions and run it first with :

goeland run

If you are interested in another platform supported, please open a PR or submit a feature request.

On first run, if it doesn't exist yet, goeland will create a config.toml with the default values. You need to adjust the [email] section with your SMTP server details.

Afterwards, fill the [sources] and [pipes] sections. Source are identified by their name after the [source.] field:

[sources.hackernews]
type = "feed"
url = "https://hnrss.org/newest"
filters = ["all", "today"]

You can then use 'hackernews' in the following pipes.

The different source types are:

• "feed": RSS, Atom or JSON feed (all supported formats can be found here). Fill in the url field.
• "imgur": Return most recent results for a tag. Fill in the the tag field.
• "merge": Will merge two or more sources together. Fill in the sources field with a list of sources: sources = ["source1", "source2"]. Especially useful to merge different sources on the same topic. Don't forget to digest or combine it later.

One powerful aspect of goeland is filtering. Instead of sending the content of the RSS directly to the email system, it can transform it in a number of ways in order to make it easier to read, process, etc.

Any number of filters can be defined, the order is important. For example, the following:

filters = ["unseen", "lebrief", "digest"]

Will first keep only previously unseen entries, then transform it nicer with lebrief filter, and, at last, will put them all together with digest. This will create only one email with a SourceTitle as the title of the RSS feed.

The available filters are as follow:

• none: Removes all entries

• all: Default, include all entries

• first: Keep only the first entry

• last: Keep only the last entry

• reverse: Reverse the order of the entries

• random: Keep 1 or more random entries. Use either 'random' or 'random(5)' for example.

• unseen: Keep only unseen entry. Entries that have been seen will be put in a goeland.db file. Use the purge command to remove seen entries.

• today: Keep only the entries for today

• lasthours: Keep only the entries that are from the X last hours (default 24)

• digest: Make a digest of all entries (optional heading level, default is 2)

• combine: Combine all the entries into one source and use the first entry title as source title. Useful for merge sources

• links: Rewrite relative links src="// and href="// to have an https:// prefix

• embedimage: Embed a picture if the entry has an attachment with a type of picture (optional position: top|bottom|left|right, default is top)

• replace: Replace a string with another. Use with an argument like this: replace(myreplace) and define

[replace.myreplace]
        from="A string"
        to="Another string"

in your config file.

• includelink: Include the link of entries in the digest form
• lebrief: Retrieves the full excerpts for Next INpact's Lebrief. Use only with a source from Next INpact.
• language: Keep only the specified languages (best effort detection), use like this: language(en,de)

After defining a number of sources, you can send them to a pipe. One source can be send to multiple pipes, but a pipe can only have one source. If you need to combine sources together, use the above special merge type to have this effect.

A pipe has the following structure:

[pipes.hackernews]
source = "hackernews"
destination = "email"
email_to = "[email protected]"
email_from = "HackerNews <[email protected]>"
email_title = "{{.EntryTitle}}"
template = "/path/to/template.html"

You can use EntryTitle, SourceTitle and SourceName in the email template. SourceTitle is the title of the RSS stream.

For debug purposes, or in order to pipe in other systems, you can set destination to terminal.

In the email section you need to specify your outgoing mail server. From 0.8.0, you can specify both encryption and allow-insecure to connect to self hosted servers. You can also specify authentication to select the appropriate option for your server (the options available are "none", "plain", "login" and "crammd5"; if unspecified it defaults to "plain"; see go-simple-mail's documentation for details).

[email]
host = "smtp.example.com"
port = 25
username = "default"
password = "p4ssw0rd"
encryption = "tls"
allow-insecure = false
authentication = "plain"
#Email customization
include-header = true
include-footer = true
#footer = Your custom footer
#logo = internal:goeland.png
#template = /path/to/template.html

You can create your own template, see relevant documentation. The pipe template takes precedence over the main template defined in the [email] section.

This will bring you 6 puppies to your inbox.

loglevel = "info"
dry-run = false

[email]
host = "smtp.sendgrid.net"
port = 587
username = "apikey"
password = "<sendgridapikey>"

[sources]

[sources.insta]
url = "https://rssbridge.example.com/?action=display&bridge=Instagram&context=Hashtag&h=puppy&media_type=picture&direct_links=on&format=MRss"
type = "feed"
filters = ["random(3)"]

[sources.imgur]
type = "imgur"
tag = "puppy"
filters = ["random(3)"]

[sources.puppies]
type = "merge"
sources = ["insta", "imgur"]
filters = ["combine"]

[pipes]

[pipes.puppies]
source = "puppies"
destination = "email"
email_to = ["[email protected]"]
email_from = "DailyPuppy <[email protected]>"

This will give you the latest article on a specific subreddit:

loglevel = "none"
dry-run = false
database = "goeland.db"

[email]
host = "example.com"
port = 25
username = "username"
password = "password"

[sources]

[sources.reddit]
url = "https://www.reddit.com/r/selfhosted/top.rss"
type = "feed"
filters = ["unseen", "includelink", "digest"]

[pipes.reddit]
source = "reddit"
destination = "email"
email_to = ["[email protected]"]
email_from = "Reddit <[email protected]>"

It is possible to send an email to multiple addresses, just put them in a list:

[pipes.reddit]
source = "reddit"
destination = "email"
email_to = ["[email protected]", "[email protected]", "[email protected]"]
email_from = "Reddit <[email protected]>"

See also the examples/ folder.

Feel free to open bugs or PR for more sources, more filters suggestions.

If you encounter a problematic feed, please open a bug with the content of the feed attached.

Here is a list of things that could be nice

• image inliner
• embedded scripting language for filters&manipulation
• remove tags for instagram
• footer text
• use enclosure of the feed as header image
• https://github.com/go-shiori/go-readability