1 files changed, 35 insertions, 0 deletions
diff --git a/src/builtins.zig b/src/builtins.zig
index 8fcc3c01..780d0bb7 100644
--- a/src/builtins.zig
+++ b/src/builtins.zig
@@ -1159,6 +1159,41 @@ pub const Putall = struct {
     }
 };
 
+/// acme's Incl, for the session: `Incl dir ...` adds directories a look at a
+/// name found nowhere else is tried in (`stdio.h`, `<foo.h>`), bare lists
+/// them, `Incl -` empties the list.
+pub const Incl = struct {
+    pub const scope: Scope = .session;
+    pub const takes_arg = true;
+    pub fn run(c: Ctx) void {
+        const p = c.p;
+        const typed = std.mem.trim(u8, c.arg orelse "", " \t\r\n");
+        if (std.mem.eql(u8, typed, "-")) {
+            for (p.incl.items) |dir| p.gpa.free(dir);
+            p.incl.clearRetainingCapacity();
+            return p.setMessage(c.id, "Incl: none");
+        }
+        var words = std.mem.tokenizeAny(u8, typed, " \t");
+        while (words.next()) |dir_word| {
+            var home_buf: [4096]u8 = undefined;
+            const full = std.fs.path.resolvePosix(p.scratch.allocator(), &.{ Pardes.paneDir(c.pane), @import("fs.zig").expandHome(dir_word, &home_buf) }) catch return;
+            if (!std.fs.path.isAbsolute(full)) return p.reportFailure(c.id, "Incl: invalid directory");
+            for (p.incl.items) |dir| {
+                if (std.mem.eql(u8, dir, full)) break;
+            } else {
+                const copy = p.gpa.dupe(u8, full) catch return;
+                p.incl.append(p.gpa, copy) catch return p.gpa.free(copy);
+            }
+        }
+        if (typed.len > 0) return;
+        var list: std.Io.Writer.Allocating = .init(p.scratch.allocator());
+        list.writer.writeAll("Incl:") catch return;
+        for (p.incl.items) |dir| list.writer.print(" {s}", .{dir}) catch return;
+        if (p.incl.items.len == 0) list.writer.writeAll(" none") catch return;
+        p.setMessage(c.id, list.written());
+    }
+};
+
 /// Write the pane's text to its file, or to the file its argument names.
 pub const Save = struct {
     pub const takes_arg = true;