first test build

Author: jcupitt

README.md

@@ -24,3 +24,88 @@ without a GUI.
 [![Screenshot](images/shot2.png)](images/shot2.png)
 
 https://github.com/user-attachments/assets/6f7bdee1-183c-4554-9701-e0c30e75d58a
+
+## flatpak
+
+Add the `flathub` repo:
+
+```shell
+flatpak remote-add --if-not-exists \
+  flathub https://flathub.org/repo/flathub.flatpakrepo
+```
+
+Install the gtk4 SDK and runtime:
+
+```shell
+flatpak install org.gnome.Sdk//47
+flatpak install org.gnome.Platform//47
+```
+
+Allow file. Recent security changes to git will cause submodule checkout
+to fail inside flatpak. If you get errors like `fatal: transport 'file'
+not allowed`, re-enable file transport with:
+
+```shell
+git config --global protocol.file.allow always
+```
+
+Build and try running it:
+
+```shell
+flatpak-builder --force-clean --user --install build-dir org.libvips.nip4.json
+flatpak run org.libvips.nip4 ~/pics/k2.jpg
+```
+
+Force a complete redownload and rebuild (should only rarely be necessary) with:
+
+```shell
+rm -rf .flatpak-builder
+```
+
+Check the files that are in the flatpak you built with:
+
+```shell
+ls build-dir/files
+```
+
+Uninstall with:
+
+```shell
+flatpak uninstall nip4
+```
+
+## Notes on flatpak build process
+
+- niftiio is annoying to build, skip it.
+
+- x265 is annoying to build, skip it
+
+- we skip imagemagick as well, too huge
+
+## Packaging for flathub
+
+Install the appdata checker:
+
+```shell
+flatpak install flathub org.freedesktop.appstream-glib
+flatpak run org.freedesktop.appstream-glib validate org.libvips.nip4.metainfo.xml
+```
+
+Also:
+
+```shell
+desktop-file-validate org.libvips.nip4.desktop
+```
+
+## Uploading to flathub
+
+Make a PR on:
+
+        https://github.com/flathub/org.libvips.nip4
+
+then check the build status here:
+
+        https://flathub.org/builds/#/apps/org.libvips.nip4
+
+On success, merge to master.
+

TODO

@@ -2,7 +2,7 @@
 
 	will need a network connection
 
-	must wrap libgsl
+	probably need imagemagick
 
 - try to save and restore image view scale and position
 

org.libvips.nip4.json

@@ -448,18 +448,12 @@
         {
             "name" : "libgsl",
             "builddir" : true,
-            "buildsystem" : "cmake-ninja",
-            "build-options" : {
-                "config-opts" : [
-                    "-DCMAKE_INSTALL_LIBDIR=lib"
-                ]
-            },
+            "buildsystem" : "autotools",
             "sources" : [
                 {
-                    "type" : "git",
-                    "url" : "https://github.com/ebiggers/libgsl.git",
-                    "tag" : "v1.22",
-                    "commit" : "2335c047e91cac6fd04cb0fd2769380395149f15"
+                    "type" : "archive",
+                    "url" : "https://ftp.snt.utwente.nl/pub/software/gnu/gsl/gsl-2.8.tar.gz",
+                    "sha256" : "6a99eeed15632c6354895b1dd542ed5a855c0f15d9ad1326c6fe2b2c9e423190"
                 }
             ]
         },