Quick and dirty PHP script to convert .stravactivity file to basic gpx xml

convert_stravactivity_to_gpx

#!/usr/bin/env php
<?php

function dateInFormat($timestamp)
{
    return date('Y-m-d\TH:i:s\Z', $timestamp);
}
function latLongInFormat($reference)
{
    return round((float) $reference, 6);
}

if ($argc <= 1) {
    die("Please provide a file\n");
}

$filename = $argv[1];

if (!preg_match('/\.stravactivity$/', $filename)) {
    die("Please provide a stravactivity file\n");
}

$filePath = realpath($filename);
if (empty($filePath)) {
    die('Couldn\'t find file: ' . $filename . "\n");
}
if (false === ($fh = @fopen($filePath, 'r'))) {
    die('Couldn\'t open ' . $filePath . " , Please check the file permissions\n");
}

date_default_timezone_set('UTC');

$start = null;
$points = array();

while (false !== ($line = fgets($fh))) {
    if (0 === strpos($line, 'wp: ')
        && preg_match_all('/(?P<name>[a-z]+)\:(?P<value>[0-9.-]+)(;\s+)??/', $line, $matches)
    ) {
        $point = [];
        foreach ($matches['name'] as $key => $name) {
            $point[$name] = $matches['value'][$key];
        }
        if ($start === null && !empty($point['t'])) {
            $start = $point['t'];
        }
        $points[] = $point;
    }
}

if (empty($points)) {
    die("No points found\n");
}

echo <<<'NOWDOC'
<?xml version="1.0" encoding="UTF-8"?>
<gpx creator="GenericScript" version="1.1" xmlns="http://www.topografix.com/GPX/1/1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd" xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3">
 <metadata>
  <time>
NOWDOC;
echo dateInFormat($start);
echo <<<'NOWDOC'
</time>
 </metadata>
 <trk>
  <name>Generated GPX</name>
  <trkseg>
NOWDOC;
foreach ($points as $point) {
    echo '   <trkpt lat="', latLongInFormat($point['lat']), '" lon="', latLongInFormat($point['long']), '">
    <ele>', round((float) $point['alt'], 1), '</ele>
    <time>', dateInFormat($point['t']), '</time>
   </trkpt>
';
}
echo <<<'NOWDOC'
  </trkseg>
 </trk>
</gpx>
NOWDOC;
echo "\n";

@Williamdb5 it's not an issue with Big Sur thankfully.
It can't find a file in your Downloads folder called convert_stravactivity_to_gpx, which means you've either not downloaded the above script, or not downloaded it to your Downloads folder

try this:

cd /Users/gilliam/Downloads/
curl -O https://gist.github.com/chappy84/8d23f9c3235796dec46ea0749c15d83f/raw/00ae732180ee70d9b0d0e9b18e1324329f59ae64/convert_stravactivity_to_gpx
chmod u+x convert_stravactivity_to_gpx
./convert_stravactivity_to_gpx /Users/gilliam/Downloads/activity.stravactivity > /Users/gilliam/Downloads/activity.gpx

The URL with the curl command is the what you get from the "Raw" link at the top of the page, and is from the last edit I made before today
That curl -O command will download the URL to your downloads folder (as long as you run it after the cd command) in a file called convert_stravactivity_to_gpx

Hopefully that helps