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Automatically determine the currect download URL also in Firefox again #95

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Merged
dscho merged 1 commit into from
Sep 1, 2026
Merged

Automatically determine the currect download URL also in Firefox again #95

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41 changes: 33 additions & 8 deletions layouts/_default/baseof.html
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Original file line number Diff line number Diff line change
Expand Up @@ -37,17 +37,42 @@
var a = document.querySelector('.version > a')
var href = a?.href.match(/^(.*\/)tag(\/.*)$/);
var version = a?.title.match(/^Version ([0-9.]*)(\(([0-9]*)?\))?/);
if (!href || !version || !navigator.userAgentData)
throw 0;
if (!href || !version) throw 0;

navigator.userAgentData.getHighEntropyValues(["architecture", "platform", "bitness"])
.then(function(browser) {
if (browser.platform != "Windows" || browser.bitness != "64") return;

var architecture = browser.architecture == "arm" ? "arm64" : "64-bit";
const setDownloadURL = (architecture) => {
var url = href[1] + 'download' + href[2] + '/Git-' + version[1] + '-' + architecture + '.exe';
document.getElementById("download").href = url;
})
};
if (!navigator.userAgentData) {
if (!navigator.userAgent?.includes('Windows')) throw 0;
/*
* Infinity - Infinity is an invalid floating-point operation. On x86,
* that operation conventionally produces the “real indefinite” negative
* NaN, whose float32 representation is 0xffc00000. ARM64 normally
* produces positive canonical NaN, 0x7fc00000.
*
* This trick was found by Marat Dukhan, as per
* https://github.com/google/XNNPACK/commit/466b52379d (Use GEMM/IGEMM
* micro-kernels with Swizzle on WAsm SIMD, 2019-10-09).
*/
const architecture = {
"ffc00000": "64-bit",
"7fc00000": "arm64",
}[
(new Uint32Array((new Float32Array([Infinity - Infinity])).buffer))[0]
.toString(16)
.padStart(8, "0")
];
if (!architecture) throw 0;
setDownloadURL(architecture);
} else {
navigator.userAgentData.getHighEntropyValues(["architecture", "platform", "bitness"])
.then(function(browser) {
if (browser.platform != "Windows" || browser.bitness != "64") return;

setDownloadURL(browser.architecture == "arm" ? "arm64" : "64-bit");
})
}
} catch(e) {}
{{ end -}}
});
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