fix: say a platform has no hardware targets

install.ps1

@@ -16,7 +16,7 @@
     # and Invoke-WebRequest throws on a cut transfer before the hash is read:
     # the site's build rewrites this line there (scripts/sitebootstrap.py).
     $mismatchAdvice = "The download was most likely cut short: try again. Within minutes of an update of this project the two files can come from caches of different ages. Waiting five minutes settles that."
-    $defaultInstallSha256 = "40647ef424033dd7bb5707f3a7c217ad0c746cad4f37f1029670045d34dac0b6"
+    $defaultInstallSha256 = "97857d0ba16eaa8be16a4c8832bf04b6ee6da1bcdbc0d747d1934cc3eb5ff909"
     $maximumInstallerBytes = 2MB
     $installerExit = 0
     $installer = if ($PSScriptRoot) { Join-Path $PSScriptRoot "install.py" } else { $null }

install.py

@@ -14388,12 +14388,13 @@ def _several_found(platforms: list[tuple[str, Path]], setups: list) -> None:
 
 
 def _unknown_target(target: str, plat: str, targets: dict) -> None:
-    print(f"Error: unknown target '{target}' for {plat}.", file=sys.stderr)
-    if targets:
-        print("  " + did_you_mean([target], sorted(targets), "--list-targets"),
-              file=sys.stderr)
-    else:
-        print(f"  {plat} publishes no target list", file=sys.stderr)
+    if not targets:
+        # No value can work: "unknown target" read as a typo of the board.
+        print(f"Error: {display_name(plat)} has no hardware targets: run again "
+              "without --target.", file=sys.stderr)
+        return
+    print(f"Error: unknown target '{target}' for {display_name(plat)}.", file=sys.stderr)
+    print("  " + did_you_mean([target], sorted(targets), "--list-targets"), file=sys.stderr)
 
 
 def _is_terminal(stream: TextIO) -> bool:

install.sh

@@ -23,7 +23,7 @@ DEFAULT_INSTALL_URL="https://raw.githubusercontent.com/Abdess/retrobios/main/ins
 # curl or wget stop on a cut transfer before the hash is read: the site's
 # build rewrites this line there (scripts/sitebootstrap.py).
 MISMATCH_ADVICE="The download was most likely cut short: try again. Within minutes of an update of this project the two files can come from caches of different ages. Waiting five minutes settles that."
-DEFAULT_INSTALL_SHA256="40647ef424033dd7bb5707f3a7c217ad0c746cad4f37f1029670045d34dac0b6"
+DEFAULT_INSTALL_SHA256="97857d0ba16eaa8be16a4c8832bf04b6ee6da1bcdbc0d747d1934cc3eb5ff909"
 MAX_INSTALLER_BYTES=2097152
 
 cleanup() {

install/launchers/index.json

@@ -27,8 +27,8 @@
         {
           "dest": "roms/ports/retrobios/install.py",
           "repo_path": "install.py",
-          "size": 1080968,
-          "sha256": "40647ef424033dd7bb5707f3a7c217ad0c746cad4f37f1029670045d34dac0b6",
+          "size": 1081112,
+          "sha256": "97857d0ba16eaa8be16a4c8832bf04b6ee6da1bcdbc0d747d1934cc3eb5ff909",
           "executable": false
         },
         {
@@ -71,8 +71,8 @@
     "muos": {
       "archive": {
         "dest": "ARCHIVE/RetroBIOS.muxapp",
-        "size": 1134595,
-        "sha256": "72ef1c1054aaff03491127694455e27d25edcc5565ace9e490bb5623c2a62840"
+        "size": 1134739,
+        "sha256": "c0bdf23698273f62236ff5928d035086625532995322b453107cc1b81c365972"
       },
       "members": [
         {
@@ -92,8 +92,8 @@
         {
           "name": "RetroBIOS/install.py",
           "repo_path": "install.py",
-          "size": 1080968,
-          "sha256": "40647ef424033dd7bb5707f3a7c217ad0c746cad4f37f1029670045d34dac0b6",
+          "size": 1081112,
+          "sha256": "97857d0ba16eaa8be16a4c8832bf04b6ee6da1bcdbc0d747d1934cc3eb5ff909",
           "executable": false
         },
         {
@@ -166,8 +166,8 @@
         {
           "dest": ".config/modules/retrobios/install.py",
           "repo_path": "install.py",
-          "size": 1080968,
-          "sha256": "40647ef424033dd7bb5707f3a7c217ad0c746cad4f37f1029670045d34dac0b6",
+          "size": 1081112,
+          "sha256": "97857d0ba16eaa8be16a4c8832bf04b6ee6da1bcdbc0d747d1934cc3eb5ff909",
           "executable": false
         },
         {

tests/test_install_cores.py

@@ -416,11 +416,23 @@ class AnUnknownTargetStopsTheRunFirst(unittest.TestCase):
             with self.assertRaises(SystemExit) as stop:
                 install.main()
         self.assertEqual(stop.exception.code, 1)
-        self.assertIn("unknown target 'steamos' for retroarch", err.getvalue())
+        self.assertIn("unknown target 'steamos' for RetroArch", err.getvalue())
         self.assertIn("Nothing was installed", err.getvalue())
         fetch.assert_not_called()
 
 
+class APlatformWithoutTargetsSaysSo(unittest.TestCase):
+    """`--target switch` on MiSTer FPGA read "unknown target", a typo to the
+    user, when no value can work there."""
+
+    def test_the_way_forward_is_named(self):
+        with contextlib.redirect_stderr(io.StringIO()) as err:
+            install._unknown_target("switch", "misterfpga", {})
+        said = err.getvalue()
+        self.assertIn("MiSTer FPGA has no hardware targets: run again without --target.", said)
+        self.assertNotIn("unknown target", said)
+
+
 class _CoreRepository(FakeRepository):
     """The fake repository with the two maps and a portable RetroArch."""