1 files changed, 34 insertions, 0 deletions

diff --git a/src/update.zig b/src/update.zig
new file mode 100644
index 0000000..a8fd075
--- /dev/null
+++ b/src/update.zig
@@ -0,0 +1,34 @@
+const std = @import("std");
+const zup = @import("zup");
+
+const Allocator = std.mem.Allocator;
+const Installation = zup.Installation;
+
+// TODO: A way to specify a subset?
+
+pub const params = "";
+pub const description = "Updates all installed Zig versions.";
+pub const min_args = 0;
+pub const max_args = 0;
+
+pub fn main(comptime Result: type, allocator: Allocator, _: Result) !void {
+    var installed = try Installation.getInstalledList(allocator);
+    defer Installation.deinitMap(allocator, &installed);
+
+    var available = try Installation.getAvailableList(allocator);
+    defer Installation.deinitMap(allocator, &available);
+
+    var it = installed.iterator();
+    while (it.next()) |kv| {
+        const name = kv.key_ptr.*;
+        const inst = kv.value_ptr.*;
+        if (available.get(name)) |avail| {
+            if (avail.version.order(inst.version) == .gt) {
+                std.log.info("Updating {s} from {} to {}...", .{ name, inst.version, avail.version });
+                try zup.install.base.perform(allocator, name, true, available);
+            }
+        }
+    }
+
+    std.log.info("Done updating", .{});
+}