From 5f783439f7a4068b9a2c0ea6074deedb55a68dc7 Mon Sep 17 00:00:00 2001
From: Allison Reid <root@cooltrainer.org>
Date: Mon, 24 Jan 2022 16:06:18 -0800
Subject: FITS: Add missing `application/fits` and legacy globs
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Make `image/fits` an alias, matching its designation of a subset of
the FITS standard, as per https://datatracker.ietf.org/doc/html/rfc4047#section-5 -

  "The general nature of the full FITS standard requires the use of the
   media type "application/fits".  Nevertheless, the principal intent
   for a great many FITS files is to convey a single data array in the
   PHDU, and such arrays are very often 2-dimensional images.  Several
   common image viewing applications already display single-HDU FITS
   files, and the prototypes for virtual observatory projects specify
   that data provided by web services be conveyed by the data array in
   the PHDU.  These uses justify the registration of a second media
   type, namely "image/fits", for files which use the subset of the
   standard described by the original FITS standard paper."

The existing alias `image/x-fits` was common before the standardization
of `application/fits` and `image/fits`, so it should stay.

Current standards and historical contexts can be found here:
  - https://fits.gsfc.nasa.gov/fits_standard.html
  - https://listmgr.nrao.edu/pipermail/fitsmime/2002-December/thread.html
  - https://www.ucolick.org/~sla/fits/mime/comments.html

Add missing eight-dot-three-style `*.fit` and `*.fts` globs for legacy files,
matching the list supported by `libvips`, i.e.,
  https://github.com/libvips/libvips/blob/757d03100566368e5d06c7355e73c1215dd34968/libvips/foreign/fits.c#L132

And as discussed in the FITS standard definition (`fits_standard40aa-le.pdf`) -

  "In the absence of other information it is reasonably safe to
   presume that a file name ending in ‘.fits’ is intended to be
   a FITS file. Nevertheless, there are other commonly used ex-
   tensions; e.g., ‘.fit’, ‘.fts’, and many others not suitable for
   listing in a media type registration."
---
 data/freedesktop.org.xml.in | 5 ++++-
 tests/mime-detection/list   | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/data/freedesktop.org.xml.in b/data/freedesktop.org.xml.in
index 0c0cf9d9..2b62ccc5 100644
--- a/data/freedesktop.org.xml.in
+++ b/data/freedesktop.org.xml.in
@@ -5363,7 +5363,7 @@ command to generate the output files.
     <glob pattern="*.epsi"/>
     <glob pattern="*.epsf"/>
   </mime-type>
-  <mime-type type="image/fits">
+  <mime-type type="application/fits">
     <comment>FITS document</comment>
     <acronym>FITS</acronym>
     <expanded-acronym>Flexible Image Transport System</expanded-acronym>
@@ -5371,7 +5371,10 @@ command to generate the output files.
       <match type="string" value="SIMPLE  =" offset="0"/>
     </magic>
     <glob pattern="*.fits"/>
+    <glob pattern="*.fit"/>
+    <glob pattern="*.fts"/>
     <alias type="image/x-fits"/>
+    <alias type="image/fits"/>
   </mime-type>
   <mime-type type="image/x-fpx">
     <comment>FPX image</comment>
diff --git a/tests/mime-detection/list b/tests/mime-detection/list
index 85eeb79c..8a07f5af 100644
--- a/tests/mime-detection/list
+++ b/tests/mime-detection/list
@@ -16,7 +16,7 @@ test.eps image/x-eps
 # https://bugs.freedesktop.org/show_bug.cgi?id=55264
 Oriental_tattoo_by_daftpunk22.eps image/x-eps
 GammaChart.exr image/x-exr
-test.fit image/fits x
+test.fit application/fits
 test.fli video/x-flic ox
 test.gif image/gif
 example.heic image/heif
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