Initial commit0.1.0

1 files changed, 38 insertions, 0 deletions

diff --git a/src/switch.zig b/src/switch.zig
new file mode 100644
index 0000000..058067d
--- /dev/null
+++ b/src/switch.zig
@@ -0,0 +1,38 @@
+const std = @import("std");
+const xdg = @import("xdg");
+const zup = @import("zup");
+
+const Allocator = std.mem.Allocator;
+const Installation = zup.Installation;
+
+pub const params = "<NAME>";
+pub const description = "Switches to a Zig version.  Run `zup list -i` to see installed <NAME>s.";
+pub const min_args = 1;
+pub const max_args = 1;
+
+pub fn main(comptime Result: type, allocator: Allocator, res: Result) !void {
+    const name = res.positionals[0];
+    if (!try Installation.isInstalled(allocator, name)) {
+        std.log.err(
+            "No installation by name {s} found, run `zup install {s}`",
+            .{ name, name },
+        );
+        return error.InstallationNotFound;
+    }
+
+    const target = blk: {
+        const data_home = try xdg.getDataHome(allocator, "zup");
+        defer allocator.free(data_home);
+
+        break :blk try std.fs.path.join(allocator, &.{ data_home, name, "zig" });
+    };
+    defer allocator.free(target);
+
+    var bin_home = try xdg.openBinHome(allocator);
+    defer bin_home.close();
+
+    bin_home.deleteFile("zig") catch {};
+    try bin_home.symLink(target, "zig", .{});
+
+    std.log.info("Switched to {s}", .{name});
+}