Enforce OxCaml forks

oxcaml-foo.guard ensures unpatched upstreams aren't available
oxcaml-foo-patches.enabled depends on patched versions of the upstream
package.

Author: dra27

.gitattributes

@@ -0,0 +1,8 @@
+# Automatically determine text files and normalise endings in the repository.
+* text=auto
+
+# Shell scripts, etc. must have LF endings, even on Windows
+*.sh text eol=lf
+
+# All generated by layout.sh
+/packages/oxcaml-**/*/opam text linguist-generated

layout.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+
+if [[ $(basename "$PWD") != 'packages' ]]; then
+  echo 'Expect to be run from within a packages directory?'>&2
+  exit 1
+elif [[ ! -d ocaml-variants/ocaml-variants.5.2.0+ox ]]; then
+  echo 'Expect to be run in an OxCaml opam-repository?'>&2
+  exit 1
+fi
+
+rm -rf oxcaml-*
+for entry in *; do
+  if [[ -d $entry ]]; then
+    [[ $entry != 'ocaml-variants' ]] || continue
+    for package in "$entry/"*; do
+      if [[ -e $package/opam ]]; then
+        package="${package#"$entry"/}"
+        case $package in
+          *~preview.*)
+            # Ignore JS 0.18 preview packages
+            ;;
+          *)
+            if [[ ! -e oxcaml-patch-guards/oxcaml-patch-guards.ox/opam ]]; then
+              mkdir -p oxcaml-patch-guards/oxcaml-patch-guards.ox
+              cat > oxcaml-patch-guards/oxcaml-patch-guards.ox/opam <<EOF
+opam-version: "2.0"
+synopsis: "OxCaml patched upstream packages"
+description: """
+oxcaml-patch-guards and the associated oxcaml-* packages ensure that when a
+non-Jane Street package in opam-repository has to be patched to work with OxCaml
+that only those patched versions can be used in a switch with OxCaml."""
+maintainer: "David Allsopp <david@tarides.com>"
+authors: "David Allsopp"
+license: "CC0-1.0+"
+homepage: "https://oxcaml.org"
+bug-reports: "https://github.com/oxcaml/opam-repository/issues"
+depends: [
+EOF
+            fi
+            if [[ ! -e oxcaml-$entry/oxcaml-$entry.guard/opam ]]; then
+              mkdir -p "oxcaml-$entry/oxcaml-$entry.guard"
+              cat > "oxcaml-$entry/oxcaml-$entry.guard/opam" <<EOF
+opam-version: "2.0"
+synopsis: "OxCaml patched $entry (not installed)"
+description: "OxCaml meta-package indicating this package is not installed"
+maintainer: "David Allsopp <david@tarides.com>"
+authors: "David Allsopp"
+license: "CC0-1.0+"
+homepage: "https://oxcaml.org"
+bug-reports: "https://github.com/oxcaml/opam-repository/issues"
+conflicts: [ "oxcaml-$entry-patches" "$entry" ]
+EOF
+              cat >> oxcaml-patch-guards/oxcaml-patch-guards.ox/opam << EOF
+  ("oxcaml-$entry" {post} | "oxcaml-$entry-patches" {post})
+EOF
+              mkdir -p "oxcaml-$entry-patches/oxcaml-$entry-patches.enabled"
+              cat > "oxcaml-$entry-patches/oxcaml-$entry-patches.enabled/opam" <<EOF
+opam-version: "2.0"
+synopsis: "OxCaml patched $entry"
+description: "OxCaml meta-package indicating this library is installed"
+maintainer: "David Allsopp <david@tarides.com>"
+authors: "David Allsopp"
+license: "CC0-1.0+"
+homepage: "https://oxcaml.org"
+bug-reports: "https://github.com/oxcaml/opam-repository/issues"
+conflicts: "oxcaml-$entry"
+depends: "$entry" {build & (
+  ${entry//?/ }             = "${package#"$entry".}"
+EOF
+            else
+              cat >> "oxcaml-$entry-patches/oxcaml-$entry-patches.enabled/opam" <<EOF
+  ${entry//?/ }           | = "${package#"$entry".}"
+EOF
+            fi;;
+        esac
+      fi
+    done
+  fi
+done
+
+for entry in oxcaml-*; do
+  case $entry in
+    oxcaml-*-patches)
+      package="${entry#oxcaml-}"
+      package="${package%-patches}"
+      cat >> "$entry/"*"/opam" <<EOF
+  ${package//?/ }           )}
+EOF
+      ;;
+  esac
+done
+
+echo ']' >> oxcaml-patch-guards/oxcaml-patch-guards.ox/opam

packages/ocaml-variants/ocaml-variants.5.2.0+ox/opam

@@ -17,6 +17,7 @@ depends: [
   "base-domains"          {post}
   "base-nnp"              {post}
   "ocaml-options-vanilla" {post}
+  "oxcaml-patch-guards"   {post}
 ]
 conflict-class: "ocaml-core-compiler"
 flags: compiler
@@ -105,43 +106,5 @@ extra-files: [
   ]
 ]
 conflicts: [
-  "base" {< "v0.18~"}
-  "alcotest" {!= "1.9.0+ox"}
-  "backoff" {!= "0.1.1+ox"}
-  "ctypes" {!= "0.23.0+ox"}
-  "ctypes-foreign" {!= "0.23.0+ox"}
-  "dot-merlin-reader" {!= "5.2.1-502+ox"}
-  "dune" {<= "3.20.2"}
-  "gen_js_api" {!= "1.1.2+ox"}
-  "js_of_ocaml" {!= "6.0.1+ox"}
-  "js_of_ocaml-compiler" {!= "6.0.1+ox"}
-  "js_of_ocaml-ppx" {!= "6.0.1+ox"}
-  "js_of_ocaml-toplevel" {!= "6.0.1+ox"}
-  "jsonrpc" {!= "1.19.0+ox"}
-  "lsp" {!= "1.19.0+ox"}
-  "lwt_ppx" {!= "5.9.1+ox"}
-  "mdx" {!= "2.5.0+ox"}
-  "merlin" {!= "5.2.1-502+ox"}
-  "merlin-lib" {!= "5.2.1-502+ox"}
-  "notty-community" {!= "0.2.4+ox"}
-  "ocaml-compiler-libs" {!= "v0.17.0+ox"}
-  "ocaml-index" {!= "1.1+ox"}
-  "ocaml-lsp-server" {!= "1.19.0+ox"}
-  "ocamlbuild" {!= "0.15.0+ox"}
-  "ocamlformat" {!= "0.26.2+ox"}
-  "ocamlformat-lib" {!= "0.26.2+ox"}
-  "ojs" {!= "1.1.2+ox"}
-  "ppxlib" {!= "0.33.0+ox"}
-  "ppxlib_ast" {!= "0.33.0+ox"}
-  "re" {!= "1.14.0+ox"}
-  "sedlex" {!= "3.6+ox"}
-  "spawn" {!= "v0.15.1+ox"}
-  "topkg" {!= "1.0.8+ox"}
-  "uTop" {!= "2.16.0+ox"}
-  "uutf" {!= "1.0.3+ox"}
-  "wasm_of_ocaml-compiler" {!= "6.0.1+ox"}
-  "zarith" {<"1.12"}
-  "zarith" {="1.12"}
-  "zarith" {="1.13"}
-  "zarith" {="1.14"}
+  "sexplib0" {< "v0.18~"}
  ]