fix: do not rely on google anymore, use github API

It seems google blacklists calls coming from github.

Signed-off-by: Maxime Soulé <btik-git@scoubidou.com>

Author: maxatome

README.md

@@ -52,15 +52,15 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x, 1.19.x, 1.20.x, 1.21.x, 1.22.x, 1.23.x, 1.24.x, tip]
+        go-version: [1.20.x, 1.21.x, 1.22.x, 1.23.x, 1.24.x, 1.25.x, 1.26.x, tip]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     runs-on: ${{ matrix.os }}
 
     steps:
       - name: Setup go
         run: |
-          curl -sL https://raw.githubusercontent.com/maxatome/install-go/v3.7/install-go.pl |
+          curl -sL https://raw.githubusercontent.com/maxatome/install-go/v3.8/install-go.pl |
               perl - ${{ matrix.go-version }} $HOME/go
 
       - name: Checkout code

install-go.pl

@@ -176,7 +176,7 @@ sub resolve_target
         $target = $1;
 
         $vreg = quotemeta($target) . '(?:\.([0-9]+))?';
-        $vreg = qr/^go$vreg\z/;
+        $vreg = qr,^refs/tags/go$vreg\z,;
 
         $last_minor = -1;
     }
@@ -185,27 +185,35 @@ sub resolve_target
         die "Bad target $target, should be 1.12 or 1.12.1 or 1.12.x or tip\n"
     }
 
-    my $r = http_get('https://go.googlesource.com/go/+refs/tags?format=JSON');
+    my $r = http_get('https://api.github.com/repos/golang/go/git/matching-refs/tags');
     $r->{success} or die "Cannot retrieve tags: $r->{status} $r->{reason}\n$r->{content}\n";
 
-    my $versions = decode_json($r->{content} =~ s/^[^{]+//r);
+    my $tags = decode_json($r->{content});
 
     my $found;
     if (defined $vreg)
     {
-        foreach (keys %$versions)
+        foreach (@$tags)
         {
-            if (/$vreg/ and $last_minor < ($1 // 0))
+            if ($_->{ref} =~ /$vreg/ and $last_minor < ($1 // 0))
             {
-                $last_minor = $1;
+                $last_minor = $1 // 0;
                 $found = 1;
             }
         }
     }
     else
     {
         # exact match expected
-        $found = exists $versions->{"go$target"};
+        my $match = "refs/tags/go$target";
+        foreach (@$tags)
+        {
+            if ($_->{ref} eq $match)
+            {
+                $found = 1;
+                last;
+            }
+        }
     }
 
     $found or die "Version $target not found\n";