Hey,

Here is an eclass that would allow me to factor quite a bit of
redundant code.

Potential users:
https://qa-reports.gentoo.org/output/genrdeps/dindex/dev-ml/opam


Examples of conversion:

diff --git a/dev-ml/ocaml-cstruct/ocaml-cstruct-3.1.1.ebuild
b/dev-ml/ocaml-cstruct/ocaml-cstruct-3.1.1.ebuild index
0acf2607860..5e238f762db 100644 ---
a/dev-ml/ocaml-cstruct/ocaml-cstruct-3.1.1.ebuild +++
b/dev-ml/ocaml-cstruct/ocaml-cstruct-3.1.1.ebuild @@ -3,7 +3,7 @@
 
 EAPI=5
 
-inherit findlib
+inherit findlib opam
 
 DESCRIPTION="Map OCaml arrays onto C-like structs"
 HOMEPAGE="https://github.com/mirage/ocaml-cstruct https://mirage.io"
@@ -57,18 +57,6 @@ src_test() {
        jbuilder runtest -p $(get_targets) || die
 }
 
-oinstall() {
-       opam-installer -i \
-               --prefix="${ED}/usr" \
-               --libdir="${D}/$(ocamlc -where)" \
-               --docdir="${ED}/usr/share/doc/${PF}" \
-               ${1}.install || die
-}
-
 src_install() {
-       oinstall cstruct
-       oinstall cstruct-unix
-       use lwt && oinstall cstruct-lwt
-       use async && oinstall cstruct-async
-       use ppx && oinstall ppx_cstruct
+       opam-install $(get_targets | tr ',' ' ')
 }


diff --git a/dev-ml/utop/utop-2.0.1.ebuild
b/dev-ml/utop/utop-2.0.1.ebuild index 90056da08e8..c3bec3b1f94 100644
--- a/dev-ml/utop/utop-2.0.1.ebuild
+++ b/dev-ml/utop/utop-2.0.1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=5
 
-inherit findlib
+inherit findlib opam
 
 DESCRIPTION="A new toplevel for OCaml with completion and colorization"
 HOMEPAGE="https://github.com/diml/utop"
@@ -30,12 +30,3 @@ DEPEND="${DEPEND}
 
 DOCS=( "CHANGES.md" "README.md" )
 SITEFILE="50${PN}-gentoo.el"
-
-src_install() {
-       opam-installer -i \
-               --prefix="${ED}/usr" \
-               --libdir="${D}/$(ocamlc -where)" \
-               --docdir="${ED}/usr/share/doc/${PF}" \
-               --mandir="${ED}/usr/share/man" \
-               ${PN}.install || die
-}



Alexis.