MAINT: Auto-update installer link

doc/_static/update_installer_version.js

@@ -0,0 +1,52 @@
+async function getRelease() {
+    result = await fetch("https://api.github.com/repos/mne-tools/mne-installers/releases/latest");
+    data = await result.json();
+    return data;
+}
+async function warnVersion() {
+    let outer = document.createElement("div");
+    let title = document.createElement("p");
+    let inner = document.createElement("p");
+    outer.setAttribute("class", "admonition warning");
+    title.setAttribute("class", "admonition-title");
+    title.innerText = "Warning";
+    data = await getRelease();
+    // Take v1.5.1 for example and change to 1.5
+    ids = ["linux-installers", "macos-intel-installers", "macos-apple-installers", "windows-installers"];
+    warn = false;
+    ids.forEach((id) => {
+        console.log(id)
+        label_id = document.getElementById(id);
+        // tab is immediately after label
+        children = [].slice.call(label_id.parentNode.children);
+        div = children[children.indexOf(label_id) + 1];
+        a = div.children[0].children[0];  // div->p->a
+        ending = a.href.split("-").slice(-1)[0];  // macOS_Intel.pkg, macOS_M1.pkg, Linux.sh, Windows.exe
+        data["assets"].forEach((asset) => {
+            if (asset["browser_download_url"].endsWith(ending)) {
+                old_stem = a.href.split("/").slice(-1)[0];
+                new_stem = asset["browser_download_url"].split("/").slice(-1)[0];
+                a.href = asset["browser_download_url"];
+                // also replace the command on Linux
+                if (ending === "Linux.sh") {
+                    code = document.getElementById("codecell0");
+                    console.log(code.innerText.replace(old_stem, new_stem));
+                }
+                // MNE-Python-1.5.1_0-Linux.sh to 1.5 for example
+                if (!warn) {
+                    old_ver = old_stem.split("-").slice(2)[0].split("_")[0].split(".").slice(0, 2).join(".");
+                    new_ver = new_stem.split("-").slice(2)[0].split("_")[0].split(".").slice(0, 2).join(".");
+                    if (old_ver !== new_ver) {
+                        warn = `The installers below are for version ${new_ver} as ${old_ver} is no longer supported`;
+                    }
+                }
+            }
+        });
+    });
+    if (warn) {
+        inner.innerText = warn;
+        outer.append(title, inner);
+        document.querySelectorAll('.platform-selector-tabset')[0].before(outer);
+    }
+}
+warnVersion();

doc/install/installers.rst

@@ -78,6 +78,9 @@ Got any questions? Let us know on the `MNE Forum`_!
 
         **Supported platforms:** Windows 10 and newer
 
+.. raw:: html
+
+  <script async="true" src="../_static/update_installer_url.js"></script>
 
 First steps
 ^^^^^^^^^^^