Author: Danny Milosavljevic <dannym@friendly-machines.com>
Date: 2024-09-03
License: GPL3+

Previously, we propagated julia-cstparser and julia-tokenize. This would only
work if the user had installed julia in their profile (because only then
JULIA_LOAD_PATH of julia-cstparser would be propagated).
That doesn't seem likely or desireable.

It turns out that it's not difficult to make julia read vendored packages.
Let's do that (since there's a comment inside JuliaSnail.jl that warns about
CSTParser APIs being easily incompatible, vendoring is better anyway).

diff -ru orig/4l8xr3ldffb30a44x157lj3asaj3ykls-emacs-julia-snail-1.3.1-checkout/JuliaSnail.jl 4l8xr3ldffb30a44x157lj3asaj3ykls-emacs-julia-snail-1.3.1-checkout/JuliaSnail.jl
--- orig/4l8xr3ldffb30a44x157lj3asaj3ykls-emacs-julia-snail-1.3.1-checkout/JuliaSnail.jl	2024-09-03 00:02:03.798373662 +0200
+++ 4l8xr3ldffb30a44x157lj3asaj3ykls-emacs-julia-snail-1.3.1-checkout/JuliaSnail.jl	2024-09-03 01:05:26.310766009 +0200
@@ -30,12 +30,12 @@
    catch err
       if isa(err, ArgumentError)
          if isfile(joinpath($dir, "Project.toml"))
-            # force dependency installation
-            Main.Pkg.activate($dir)
-            Main.Pkg.instantiate()
-            Main.Pkg.precompile()
-            # activate what was the first entry before Snail was pushed to the head of LOAD_PATH
-            Main.Pkg.activate(LOAD_PATH[2])
+             # force dependency installation
+             if isa(err, ArgumentError)
+                 error("Vendored dependencies not found. Please make sure the vendored packages are located in the 'vendor' directory.")
+             else
+                 rethrow(err)
+             end
          end
       end
    finally
@@ -51,11 +51,16 @@
 end
 
 @with_pkg_env (@__DIR__) begin
-   # list all external dependency imports here (from the appropriate Project.toml, either Snail's or an extension's):
-   import CSTParser
-   # check for dependency API compatibility
-   !isdefined(CSTParser, :iscall) &&
-     throw(ArgumentError("CSTParser API not compatible, must install Snail-specific version"))
+    @with_pkg_env (joinpath(@__DIR__, "vendor", "CSTParser")) begin
+        @with_pkg_env (joinpath(@__DIR__, "vendor", "Tokenize")) begin
+            println(LOAD_PATH)
+            # list all external dependency imports here (from the appropriate Project.toml, either Snail's or an extension's):
+            import CSTParser
+            # check for dependency API compatibility
+            !isdefined(CSTParser, :iscall) &&
+                throw(ArgumentError("CSTParser API not compatible, must install Snail-specific version"))
+        end
+    end
 end