feat(assistant): tell a nameless file's kind from its content

A script with no suffix staged as 'other' and was refused. A staged file
the name says nothing about is now handed to file(1) once, and its mime
type gives the kind, so a shell script is code and gets Explain and
Review. The daemon makes its own call on the content.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 31 insertions, 1 deletions

diff --git a/desktop/assistant/Assistant.qml b/desktop/assistant/Assistant.qml
index 977b4dd..0139ef9 100644
--- a/desktop/assistant/Assistant.qml
+++ b/desktop/assistant/Assistant.qml
@@ -105,10 +105,40 @@ Scope {
         root.staged = files;
         root.historyOpen = root.pickerOpen = false;
         root.open = true;
+        root.refine();
     }
 
     function stage(path) {
-        if (!root.staged.some(f => f.path === path)) root.staged = root.staged.concat([Files.file(path)]);
+        if (root.staged.some(f => f.path === path)) return;
+        root.staged = root.staged.concat([Files.file(path)]);
+        root.refine();
+    }
+
+    // A file whose name says nothing (a script with no suffix) is "other"
+    // until file(1) has read it. One run for all of them; the daemon makes
+    // its own call on the content when the question is sent.
+    function refine() {
+        const unknown = root.staged.filter(f => f.kind === "other").map(f => f.path);
+        if (!unknown.length) return;
+        sniff.paths = unknown;
+        sniff.running = false;            // a running Process ignores running = true
+        sniff.running = true;
+    }
+
+    Process {
+        id: sniff
+        property var paths: []
+        command: ["file", "-b", "--mime-type", "--"].concat(paths)
+        stdout: StdioCollector {
+            onStreamFinished: {
+                const mimes = text.trim().split("\n");
+                root.staged = root.staged.map(f => {
+                    const i = sniff.paths.indexOf(f.path);
+                    return i < 0 || f.kind !== "other" ? f
+                         : Object.assign({}, f, { kind: Files.fromMime(mimes[i] ?? "") });
+                });
+            }
+        }
     }
     function unstage(i) {
         const s = root.staged.slice();