fix(git): prepend https:// to *_HOST vars in mkrep server detection

$GITEA_HOST/$GITLAB_HOST are bare hostnames (git.example.com); only
$GITEA_URL/$GITLAB_URL are expected to carry a scheme. mkrep was using
_HOST values as-is, producing a schemeless clone URL when only the
_HOST var was set.

functions/mkrep.fish

@@ -42,7 +42,9 @@
 #   --server <type> (gitea, gitlab, or github) picks a host without an
 #   explicit --remote/--new-remote: resolve its base URL from
 #   $GITEA_URL/$GITEA_HOST (gitea) or $GITLAB_URL/$GITLAB_HOST (gitlab),
-#   preferring the _URL form when both are set, then run
+#   preferring the _URL form when both are set. _URL is used as-is and
+#   must include its scheme (https://git.example.com); _HOST is bare
+#   (git.example.com) and gets https:// prepended. Then run
 #   $MKREP_REMOTE_CMD or that type's built-in default template. With no
 #   --server, --remote, or --new-remote, $GIT_SERVER picks the type the
 #   same way (invalid values are rejected the same as an invalid
@@ -195,13 +197,13 @@ function mkrep --description 'Create a directory, cd into it, and git init it'
                 if test -n "$GITEA_URL"
                     set srv_url $GITEA_URL
                 else if test -n "$GITEA_HOST"
-                    set srv_url $GITEA_HOST
+                    set srv_url "https://$GITEA_HOST"
                 end
             case gitlab
                 if test -n "$GITLAB_URL"
                     set srv_url $GITLAB_URL
                 else if test -n "$GITLAB_HOST"
-                    set srv_url $GITLAB_HOST
+                    set srv_url "https://$GITLAB_HOST"
                 end
             case github
                 # gh defaults to github.com; no base url needed

tests/test-mkrep.fish

@@ -289,6 +289,38 @@ begin
     rm -rf $base
 end
 
+section "mkrep: \$GITEA_HOST gets https:// prepended, \$GITEA_URL wins over it"
+
+begin
+    _mkrep_stub_tool tea 1
+    set -l base (_mkrep_sandbox)
+    set -l target $base/repo
+    set -lx PATH $stub_bin $PATH
+    set -lx GITEA_URL ''
+    set -lx GITEA_HOST gitea.example.invalid
+    set -lx MKREP_REMOTE_CMD 'echo {server} >created.txt'
+    mkrep --server gitea $target >/dev/null
+    check "bare \$GITEA_HOST exits 0" 0 $status
+    check "bare \$GITEA_HOST gets https:// prepended" https://gitea.example.invalid (cat $target/created.txt)
+    cd $start
+    rm -rf $base
+end
+
+begin
+    _mkrep_stub_tool tea 1
+    set -l base (_mkrep_sandbox)
+    set -l target $base/repo
+    set -lx PATH $stub_bin $PATH
+    set -lx GITEA_HOST wrong.example.invalid
+    set -lx GITEA_URL https://right.example.invalid
+    set -lx MKREP_REMOTE_CMD 'echo {server} >created.txt'
+    mkrep --server gitea $target >/dev/null
+    check "\$GITEA_URL wins over \$GITEA_HOST exits 0" 0 $status
+    check "\$GITEA_URL wins over \$GITEA_HOST, used as-is" https://right.example.invalid (cat $target/created.txt)
+    cd $start
+    rm -rf $base
+end
+
 section "mkrep: \$GITEA_URL alone (no \$GIT_SERVER) does not trigger anything"
 
 begin