Move the depends field to dune.opam.template

So that we can have the special dependency on ocaml

Signed-off-by: Jeremie Dimino <jeremie@dimino.org>

.travis.yml

@@ -10,7 +10,7 @@ install: bash -ex .travis-ci.sh prepare
 script: bash -ex .travis-ci.sh build
 
 # Please keep the list in sync with the minimal version of OCaml in
-# dune-project and bootstrap.ml
+# dune-project, dune.opam.template and bootstrap.ml
 
 matrix:
   include:

dune-project

@@ -16,12 +16,7 @@
 
 (package
  (name dune)
- (depends
-  ;; Please keep the lower bound in sync with .travis.yml and
-  ;; min_ocaml_version in bootstrap.ml
-  (ocaml (>= 4.07))
-  base-unix
-  base-threads)
+ ; The "depends" and "build" field are written in dune.opam.template
  (conflicts
   (odoc (< 1.3.0))
   (dune-release (< 1.3.0))

dune.opam

@@ -26,11 +26,6 @@ license: "MIT"
 homepage: "https://github.com/ocaml/dune"
 doc: "https://dune.readthedocs.io/"
 bug-reports: "https://github.com/ocaml/dune/issues"
-depends: [
-  "ocaml" {>= "4.07"}
-  "base-unix"
-  "base-threads"
-]
 conflicts: [
   "odoc" {< "1.3.0"}
   "dune-release" {< "1.3.0"}
@@ -43,3 +38,10 @@ build: [
   ["ocaml" "bootstrap.ml" "-j" jobs]
   ["./dune.exe" "build" "-p" name "--profile" "dune-bootstrap" "-j" jobs]
 ]
+depends: [
+  # Please keep the lower bound in sync with .travis.yml and
+  # min_ocaml_version in bootstrap.ml
+  ("ocaml" {>= "4.07"} | ("ocaml" {< "4.07~~"} & "ocamlfind-secondary"))
+  "base-unix"
+  "base-threads"
+]

dune.opam.template

@@ -4,3 +4,10 @@ build: [
   ["ocaml" "bootstrap.ml" "-j" jobs]
   ["./dune.exe" "build" "-p" name "--profile" "dune-bootstrap" "-j" jobs]
 ]
+depends: [
+  # Please keep the lower bound in sync with .travis.yml, dune-project
+  # and min_ocaml_version in bootstrap.ml
+  ("ocaml" {>= "4.07"} | ("ocaml" {< "4.07~~"} & "ocamlfind-secondary"))
+  "base-unix"
+  "base-threads"
+]