The --appimage-extract method is broken for v1.19.4. The AppImage runtime fails with "This doesn't look like a squashfs image" even though the download is valid (SHA256 passes).

Workaround: Use unsquashfs with the correct offset instead.

Diff for PKGBUILD:

--- a/PKGBUILD
+++ b/PKGBUILD
@@ -38,7 +38,8 @@ prepare() {
         s/@runname@/${pkgname%-bin}/g
     " "${srcdir}/${pkgname%-bin}.sh"
     chmod +x "${srcdir}/${pkgname%-bin}-${pkgver}-${CARCH}.AppImage"
-    "${srcdir}/${pkgname%-bin}-${pkgver}-${CARCH}.AppImage" --appimage-extract > /dev/null
+    # Workaround: --appimage-extract is broken, use unsquashfs with offset
+    unsquashfs -dest "${srcdir}/squashfs-root" -offset 944632 "${srcdir}/${pkgname%-bin}-${pkgver}-${CARCH}.AppImage" > /dev/null
     sed -i "s/${_appname}/${pkgname%-bin}/g" "${srcdir}/squashfs-root/${_appname}.desktop"
     sed -i "s/${_appname}/${pkgname%-bin}/g" "${srcdir}/squashfs-root/usr/share/metainfo/${_appname}.appdata.xml"
 }

Quick fix: After downloading the PKGBUILD with paru --getpkgbuild aur/lagrange-bin, run:

cd lagrange-bin
sed -i 's|"${srcdir}/${pkgname%-bin}-${pkgver}-${CARCH}.AppImage" --appimage-extract > /dev/null|unsquashfs -dest "${srcdir}/squashfs-root" -offset 944632 "${srcdir}/${pkgname%-bin}-${pkgver}-${CARCH}.AppImage" > /dev/null|' PKGBUILD
makepkg -si

Would be great if you could upstream this fix to the PKGBUILD! 🙏

I was able to complete the install by updating sha256sums_x86_64 to: 371b5e8958df964e5c1f69ef6b6ef3545c3be56539dd9d68fb98c9091a1cf4f6

however, when I try to run (I'm using sway), I get the following error message:

[SDL] init failed: wayland not available

Hello I encountered an error while trying to build the lagrange-bin package. The validation of the lagrange-1.19.1-x86_64.AppImage file failed with the following message:

==> Validating source_x86_64 files with sha256sums...
    lagrange-1.19.1-x86_64.AppImage ... FAILED
==> ERROR: One or more files did not pass the validity check!
Failed to build lagrange-bin

@m040601 I've update the PKGBUILD file.But I can't test it becauese I don't have the related devices.Please help me to verify it.Thank you!

Thanks for providing this PKGBUILD. Very usefull.

The developer also releases appimages for armhf. These should support all arm architectures, both 32bit and 64bit.

Very very usefull is small underpowerd chromebooks and raspberry pi' running Arch Linux ARM

https://git.skyjake.fi/gemini/lagrange/releases

...
      □ 9.7 MiB Lagrange-1.16.1-armhf.AppImage
      □ 488 B Lagrange-1.16.1-armhf.AppImage.sig
...

Please change the PKGBUILD to also support this, and add someting like this,

arch=('x86_64' 'aarch64' 'armv7h')

(Example how others do it, https://aur.archlinux.org/packages/obsidian-appimage )

Thanks in advance.