preserve the existing known hosts information when ssh-keyscan encounters an issue (#9)

Also include the updated known_hosts

Author: zeshanziya

.github/update-known-hosts.php

@@ -7,6 +7,19 @@
 
 log("Fetching the list of regions from the API...");
 
+// Read the existing known_hosts file.
+$existing_known_hosts = [];
+$e_filename = __DIR__ . '/../known_hosts';
+if (\file_exists($e_filename)) {
+    $known_hosts_lines = \file($e_filename, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+
+    // Build an associative array based on domain key.
+    foreach ($known_hosts_lines as $line) {
+        [$e_domain, ] = \explode(' ', trim($line));
+        $existing_known_hosts[trim($e_domain)] = $line;
+    }
+}
+
 $json = run($cliCommand . ' api:curl ' . escapeshellarg('/regions?filter[private]=0'));
 $regions = $json ? \json_decode($json, true) : [];
 if (!$regions || empty($regions['regions'])) {
@@ -39,6 +52,10 @@
         if ($output = run('ssh-keyscan ' . \escapeshellarg($prefix . $domain) . ' 2>/dev/null')) {
             $known_hosts[] = trim($output);
         }
+        elseif (isset($existing_known_hosts[$prefix . $domain])) {
+            // Use the existing record as fallback if ssh-keyscan fails.
+            $known_hosts[] = $existing_known_hosts[$prefix . $domain];
+        }
         $i++;
     }
 }

known_hosts

@@ -10,6 +10,7 @@ git.eu.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDo0sNDnrxZ4N0UEFhdgYmX5
 ssh.eu.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDo0sNDnrxZ4N0UEFhdgYmX5htjsY/XnG4aJImgCaqGhO6/ijj5kK+MLkHXGsekVWWIe69egMsXFII5Kj354Os4R7615CJfcxoq46W/kIkDwI2wAIh1dtJ/hfA0woE5T3ydETY+SflE0KwgPVesy8jznL8TuJ4/YF4nSgKg9RtPqxDz+7VnjEPMHilGVGqR1qHYDve8Y3jQDZW+1X6vCIhWrxmgQ0h0aq8oaA/Em2zAi7OQZVym02tnibnSU13AcRCHZ3hmecZuoqRxFUssUs+tmlHGZ1Fh7GQ8yXqjeFLevjEcIPSjo4zYG9Eg34tOeRSGj9wp88w+Miw70rxw0mwz
 git.eu-2.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDFKM3dQWu2/aCXDhZVSSHEQskK+6pN+snPS7XSfd9TgbmhUKYhp22bHsA/YAiUh/V1CB/hsGQLByvPNt/J0lRAn8in6VoCOad6NRZErs315FsmiU2jH+bcS4imKj3ayje81cn9qJPJpe5Jg6YIqz00l/XjUiz58ehFJE+xkqiKmZ46uVKH9z6jC46WQj5ia4tZYGpF5l0fAzfzq7IXhz8PLGfrDYJt5O28I1CerJ8tCX2zdOJ9I/urNuZ/FlnijDtZq3LP6/lmWOXoxOFaDKHhCwaRnlgonMskIZgnh5wOxi5QqLpZ+D0KX3x8iDVO1bstf/HKrOPSen0i8QQyj+Bd
 ssh.eu-2.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDFKM3dQWu2/aCXDhZVSSHEQskK+6pN+snPS7XSfd9TgbmhUKYhp22bHsA/YAiUh/V1CB/hsGQLByvPNt/J0lRAn8in6VoCOad6NRZErs315FsmiU2jH+bcS4imKj3ayje81cn9qJPJpe5Jg6YIqz00l/XjUiz58ehFJE+xkqiKmZ46uVKH9z6jC46WQj5ia4tZYGpF5l0fAzfzq7IXhz8PLGfrDYJt5O28I1CerJ8tCX2zdOJ9I/urNuZ/FlnijDtZq3LP6/lmWOXoxOFaDKHhCwaRnlgonMskIZgnh5wOxi5QqLpZ+D0KX3x8iDVO1bstf/HKrOPSen0i8QQyj+Bd
+git.eu-4.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDKIClyq/OHY6u+tlG+LXVwdcMsOGNG1UTOYuYrdCx4CBPiHbdZkizhFFDiJD4pTTtISW7zuiKGWiYmqznwDfeZ2jfEH4NjCyhsMqFWgJ/MwIQDZJGZAGMj9QXEJpCIVyb4D7n1VuKlt0W1KLL4C/a0E7tTU9+1bF38lyhO/QvRNNJD1fgYeZse75stVqftNmp6HA2JIvcQolH1afMSyi0c0CgCPL97nC+qYBOCRd+vtGP/5q5GT9KHENlIcmciu7r23NtIo5U2ytqnKtgnDkngpLTWgPXlepr+VIBSfy1XnoC+gW8uJ6TtF6+L1yz4NrsvBqTJfcdG6318xQ7Hnwz5
 ssh.eu-4.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDKIClyq/OHY6u+tlG+LXVwdcMsOGNG1UTOYuYrdCx4CBPiHbdZkizhFFDiJD4pTTtISW7zuiKGWiYmqznwDfeZ2jfEH4NjCyhsMqFWgJ/MwIQDZJGZAGMj9QXEJpCIVyb4D7n1VuKlt0W1KLL4C/a0E7tTU9+1bF38lyhO/QvRNNJD1fgYeZse75stVqftNmp6HA2JIvcQolH1afMSyi0c0CgCPL97nC+qYBOCRd+vtGP/5q5GT9KHENlIcmciu7r23NtIo5U2ytqnKtgnDkngpLTWgPXlepr+VIBSfy1XnoC+gW8uJ6TtF6+L1yz4NrsvBqTJfcdG6318xQ7Hnwz5
 git.eu-5.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDHVvr73G2u1j0s0RqixwpIGsTKagv3vMErXj/ixorbbuuNFmln8l2OqLo9cvg6QmO8OJFpY1xdOAIQ1hfzcZud+LCdMAxvsC7lz9VMb26Vchuc7o+lq0+w8ORAlKqlFfl2MpLtbEuuRaellXaTlQ36cSKwuCHOfzqsKDyb+Umpm+bYk6ICLnJyiEldo1cs8cAQNIgXRmPiJ2Ws/OamfJi/b1CajNZr6Q3gs7oqRbWBt9mgDFU9sFDMWDmmBAvDQj2azSk2i1hFQ4/lzczt6vQH9vusnESPCJfAiMJb60868BhuvOV9oxITItzwgNDFJltL8LNadZ4x6VvMmPV0DpJb
 ssh.eu-5.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDHVvr73G2u1j0s0RqixwpIGsTKagv3vMErXj/ixorbbuuNFmln8l2OqLo9cvg6QmO8OJFpY1xdOAIQ1hfzcZud+LCdMAxvsC7lz9VMb26Vchuc7o+lq0+w8ORAlKqlFfl2MpLtbEuuRaellXaTlQ36cSKwuCHOfzqsKDyb+Umpm+bYk6ICLnJyiEldo1cs8cAQNIgXRmPiJ2Ws/OamfJi/b1CajNZr6Q3gs7oqRbWBt9mgDFU9sFDMWDmmBAvDQj2azSk2i1hFQ4/lzczt6vQH9vusnESPCJfAiMJb60868BhuvOV9oxITItzwgNDFJltL8LNadZ4x6VvMmPV0DpJb
@@ -19,7 +20,9 @@ git.fr-4.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvCpjQnnCR6VDXTL/neY5
 ssh.fr-4.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvCpjQnnCR6VDXTL/neY5wqIe7Z1OUSxdLMqDCGpkDSLTN7I9Jj8MvMR1A0nuehwRpV1kHFJ4HryPyFGvR9BSFib4VZ1cd51iTSbphDkpbp3E7ukNzqV445+iPEwRPNDzJFKL3z/C7RR9ss6crP5h1Cn/qQaxjVTZry+zmv0IgSIkb3ipCN6QL6nXUOsabk4YB4YiVUlQWSNizWNn5cFOvby7DCd/lzlOz2zR7fgD2Cjbzs+2uz832r2wb2CnsVMAdGOs/MnlPy7RS16h6wa8M10UxJztTESdJ8zj1qbToPQyKHILpSSX3+E2wrrdVJ3OeG2skwElp/EhHAjcv7C65
 git.uk-1.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC+zGy0b99QbRYBuHtym0jEMMZXo/E8WYYcp9ua7I7p2KOzBKoze7udHMB2tRVC4RTrSPeiMoN59Qjl8JgN5/qVW7TUOyotcftYVNm0YUpv8gWlXxnnJxxHghkWrOVBEl773t0att6da2LKsoJ2hWR9ICivcX1f1cnhLyBl4SHTHnlyl6Pp+ZrB2n/KD5z9duQTZ9d6OdUaJ9GJ181HAypH7+CWq6NHejDdX/sMQrIkpe79fx5wrhUMUu/UxDcmupBwn3Xg01BoHvxz+GRg/hbEH+J/6IYH/ZyMqUbo+iav7xILw76Q0dA/nbMWVmhfucAC+UVI0dehH+KI2qqsqMFJ
 ssh.uk-1.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC+zGy0b99QbRYBuHtym0jEMMZXo/E8WYYcp9ua7I7p2KOzBKoze7udHMB2tRVC4RTrSPeiMoN59Qjl8JgN5/qVW7TUOyotcftYVNm0YUpv8gWlXxnnJxxHghkWrOVBEl773t0att6da2LKsoJ2hWR9ICivcX1f1cnhLyBl4SHTHnlyl6Pp+ZrB2n/KD5z9duQTZ9d6OdUaJ9GJ181HAypH7+CWq6NHejDdX/sMQrIkpe79fx5wrhUMUu/UxDcmupBwn3Xg01BoHvxz+GRg/hbEH+J/6IYH/ZyMqUbo+iav7xILw76Q0dA/nbMWVmhfucAC+UVI0dehH+KI2qqsqMFJ
+git.us.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDTrolLNSsqP9rtd7NDiH0D7mwIuSJYBx3HxLv/84PFrEPJE0nXlbYpa0dMdo38ZFUaJw05nXfh7y1OSuKHw1ohfsmUT6cA+F13fbMyXBRKG69TNuHBt3cvSQ3HngSyZ3P9TXj7UyuCK2eDYiiUrsrBmZM7WQD/lsE63/PufOCQk3BwIS/xT+ZNiaXHRZBHR70cQcn8Nn3FfDrtf/WRtcytgm/8A8rd4YWyJsmhDUlS7j/8oP7DcB0yPNq1QGuEJPF0zQGiXd/ySbaaZPvEyMbW+mvox7rxgUViIqGw3s5ys1nFCmd/SYCJrfC1i+q4z13n7RkfMBaNBc0eufT2WHeJ
 ssh.us.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDTrolLNSsqP9rtd7NDiH0D7mwIuSJYBx3HxLv/84PFrEPJE0nXlbYpa0dMdo38ZFUaJw05nXfh7y1OSuKHw1ohfsmUT6cA+F13fbMyXBRKG69TNuHBt3cvSQ3HngSyZ3P9TXj7UyuCK2eDYiiUrsrBmZM7WQD/lsE63/PufOCQk3BwIS/xT+ZNiaXHRZBHR70cQcn8Nn3FfDrtf/WRtcytgm/8A8rd4YWyJsmhDUlS7j/8oP7DcB0yPNq1QGuEJPF0zQGiXd/ySbaaZPvEyMbW+mvox7rxgUViIqGw3s5ys1nFCmd/SYCJrfC1i+q4z13n7RkfMBaNBc0eufT2WHeJ
+git.us-2.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDM1ZokfNnDwh/eoLazPQ9X0A4y2Ypht9DgKu3P7Rh1R7GvXInb8aDmGhJV0ynmGFPtmI109IdltFUfY9q91lwPxu0+8PFxcZjziWAgk+/qXJ4XO/vj0fa3ziwA4uQU2WGRoBjrJ9aCor71pdOnMzNAc0vTuBI/GRbxPwYJkfrNBBp9fNKhddrEujKSYylobhClAwA8PUK74ptCnk1G9utd0WBeQ6Oe4f24Okv1qm3htZ54Prfpo6l82xNCR+1b5crP3fzYlqSvwC5OKthKOgBYvxVwi/FfT+hGrus3EQbezUEh3KevnEq0a9iCpmNuVehSsi3ikfPJql2sNBPkRwmN
 ssh.us-2.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDM1ZokfNnDwh/eoLazPQ9X0A4y2Ypht9DgKu3P7Rh1R7GvXInb8aDmGhJV0ynmGFPtmI109IdltFUfY9q91lwPxu0+8PFxcZjziWAgk+/qXJ4XO/vj0fa3ziwA4uQU2WGRoBjrJ9aCor71pdOnMzNAc0vTuBI/GRbxPwYJkfrNBBp9fNKhddrEujKSYylobhClAwA8PUK74ptCnk1G9utd0WBeQ6Oe4f24Okv1qm3htZ54Prfpo6l82xNCR+1b5crP3fzYlqSvwC5OKthKOgBYvxVwi/FfT+hGrus3EQbezUEh3KevnEq0a9iCpmNuVehSsi3ikfPJql2sNBPkRwmN
 git.us-3.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDLFxThoz62qBwaVmuJxG2jC+t+7Z44IvX7fYOl3cYoo/CNrvQuXnr+T6HyPtxOX75k8gPlKfrGVclEK3v0RoPX9BgQqHeS4d//lIqnhARccaWJVnjwc2f8fK/QKhDE45pmL/jSnMyiwDp32aOKt8CpZUqBI94lBhbsKcl+ud4U8zJ8nyV2CgE5PYB3GGpSxARM3fckhfrOevkAaTGtNBNE9myVVevuA5cgx6nQtovE5ewuWUML1XTWqhCtFyrweX2naqQ99gTZj1u5eg+WgttsGbiMw8SJ1942A04+Jq7vgNuJDnTV7EKiguS5QVZPmgiQEsiOrRWKvF9IniG3Bsp5
 ssh.us-3.platform.sh ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDLFxThoz62qBwaVmuJxG2jC+t+7Z44IvX7fYOl3cYoo/CNrvQuXnr+T6HyPtxOX75k8gPlKfrGVclEK3v0RoPX9BgQqHeS4d//lIqnhARccaWJVnjwc2f8fK/QKhDE45pmL/jSnMyiwDp32aOKt8CpZUqBI94lBhbsKcl+ud4U8zJ8nyV2CgE5PYB3GGpSxARM3fckhfrOevkAaTGtNBNE9myVVevuA5cgx6nQtovE5ewuWUML1XTWqhCtFyrweX2naqQ99gTZj1u5eg+WgttsGbiMw8SJ1942A04+Jq7vgNuJDnTV7EKiguS5QVZPmgiQEsiOrRWKvF9IniG3Bsp5