[HN Gopher] Show HN: Daylight - track sunrise / sunset times in ...
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Show HN: Daylight - track sunrise / sunset times in your terminal
I love the sunlight and dread the long, dark winter evenings of
Northern Europe. I often look up sunrise / sunset times and count
off the days until the darkness is gone. Now I've written a
terminal app for this (Mac/Linux) Features: a colorful summary of
daylight times for your location; projected change over the coming
days; handles NO_COLOR and a ---short flag if you dislike the
output format. The location is IP-based but you can override this
if you're on a VPN. Just create a terminal alias with the --loc
flag. The app supports areas in the arctic / antarctic circle too.
Check our the repository for a preview and instructions on how you
can install it with Homebrew. (There is a Windows build but it's
not yet tested)
Author : jbreckmckye
Score : 53 points
Date : 2025-03-09 12:21 UTC (3 days ago)
(HTM) web link (github.com)
(TXT) w3m dump (github.com)
| japaget wrote:
| Windows build works fine (Windows 10 Professional x64 22H2).
| jbreckmckye wrote:
| Thanks! (Don't have a Windows machine right now so that's very
| helpful)
| rrr_oh_man wrote:
| Great looking app!!
|
| I immediately checked how you do location lookups:
|
| _> IP lookup is powered by https://ipinfo.io. They provide a
| good service so please don't spam requests._
|
| There was a thread about them recently -- the scale of their
| operation was very surprising.
| jbreckmckye wrote:
| It _is_ possible to use native OS APIs for location lookup, but
| these all seem to rely on cgo. Which was a bit intimidating for
| a "let's learn Golang" project
|
| (Probably not the nicest code and no doubt I've broken a lot of
| Go idioms, but it was a good learning exercise)
|
| IPInfo is a good service and their developer relations were
| surprisingly relaxed about me (mis)using their API this way
| thenthenthen wrote:
| Cool! Can we use the sky hue as Terminal background or overal
| "theme"?
| oftenwrong wrote:
| I was curious how the times were obtained. It uses
| https://github.com/nathan-osman/go-sunrise , which links to this
| calculation method:
| https://en.wikipedia.org/wiki/Sunrise_equation#Complete_calc...
| ndegruchy wrote:
| Of course, you can get this information in Emacs, too. You'll
| need to get your lat and long, first: (setq
| calendar-latitude 12.3456 calendar-longitude
| -98.7654)
|
| Then, you can `M-x sunrise-sunset` and see the times (and total
| daylight hours) in the echo area.
| jrootabega wrote:
| Is the noon color scheme supposed to look like Finn from
| Adventure Time?
| voidUpdate wrote:
| Does this pull the times from an online service or are they
| calculated locally? I tried to read the code to work it out but I
| don't program in Go so I got a little lost
| jbreckmckye wrote:
| It gets your latitude/longitude from an IP lookup service, then
| does a geometric calculation locally
| jmholla wrote:
| Is there a configuration file or command line option to
| provide location information manually?
| jbreckmckye wrote:
| Yes, you can use `--loc="12.34,56.78"` where the values are
| longitude and latitude.
|
| You can also override the Timezone with `--timezone`
| (passing an IANA timezone e.g. America/New_York).
| kseistrup wrote:
| This is nice, I like it!
|
| Is there a way to make it use 24h time, rather than AM/PM?
| kseistrup wrote:
| If I use e.g. `daylight --timezone=Europe/Copenhagen` it does
| actually show the 24h times, which is nice. But til still
| appends AM/PM, which is kind of weird. :)
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(page generated 2025-03-12 23:01 UTC)