Use opam 2.0 format

cairo2-gtk.opam

@@ -1,25 +1,28 @@
-opam-version: "1.2"
+opam-version: "2.0"
 maintainer: "Christophe Troestler <Christophe.Troestler@umons.ac.be>"
 authors: [ "Christophe Troestler <Christophe.Troestler@umons.ac.be>"
            "Pierre Hauweele <pierre@hauweele.net>" ]
 license: "LGPL-3.0 with OCaml linking exception"
 homepage: "https://github.com/Chris00/ocaml-cairo"
-dev-repo: "https://github.com/Chris00/ocaml-cairo.git"
+dev-repo: "git+https://github.com/Chris00/ocaml-cairo.git"
 bug-reports: "https://github.com/Chris00/ocaml-cairo/issues"
 doc: "https://Chris00.github.io/ocaml-cairo/doc"
-tags: [ "Cairo" "stroke" "drawing" "tutorial"  ]
+tags: ["Cairo" "stroke" "drawing" "tutorial"]
 build: [
-  [ "dune" "subst" ] {pinned}
-  [ "dune" "build" "-p" name "-j" jobs ]
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "build" "@doc"] {with-doc}
 ]
-build-doc: [ "dune" "build" "@doc" ]
 depends: [
+  "ocaml" {>= "4.02"}
   "base-bigarray"
   "dune" {build}
   "conf-pkg-config" {build}
   "conf-cairo"
   "cairo2"
   "lablgtk2"
 ]
-available: [ ocaml-version >= "4.02" ]
-
+synopsis: "Rendering Cairo on Gtk canvas"
+description: """
+This provides the link between Cairo and Lablgtk.
+"""

cairo2-pango.opam

@@ -1,25 +1,28 @@
-opam-version: "1.2"
+opam-version: "2.0"
 maintainer: "Christophe Troestler <Christophe.Troestler@umons.ac.be>"
 authors: [ "Christophe Troestler <Christophe.Troestler@umons.ac.be>"
            "Pierre Hauweele <pierre@hauweele.net>" ]
 license: "LGPL-3.0 with OCaml linking exception"
 homepage: "https://github.com/Chris00/ocaml-cairo"
-dev-repo: "https://github.com/Chris00/ocaml-cairo.git"
+dev-repo: "git+https://github.com/Chris00/ocaml-cairo.git"
 bug-reports: "https://github.com/Chris00/ocaml-cairo/issues"
 doc: "https://Chris00.github.io/ocaml-cairo/doc"
-tags: [ "Cairo" "stroke" "drawing" "tutorial"  ]
+tags: ["Cairo" "stroke" "drawing" "tutorial"]
 build: [
-  [ "dune" "subst" ] {pinned}
-  [ "dune" "build" "-p" name "-j" jobs ]
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "build" "@doc"] {with-doc}
 ]
-build-doc: [ "dune" "build" "@doc" ]
 depends: [
+  "ocaml" {>= "4.02"}
   "base-bigarray"
   "dune" {build}
   "conf-pkg-config" {build}
   "conf-cairo"
   "cairo2"
   "lablgtk2"
 ]
-available: [ ocaml-version >= "4.02" ]
-
+synopsis: "Interface between Cairo and Pango"
+description: """
+Interface lablgtk Pango interface with Cairo.
+"""

cairo2.opam

@@ -1,22 +1,21 @@
-opam-version: "1.2"
+opam-version: "2.0"
 maintainer: "Christophe Troestler <Christophe.Troestler@umons.ac.be>"
 authors: [ "Christophe Troestler <Christophe.Troestler@umons.ac.be>"
            "Pierre Hauweele <pierre@hauweele.net>" ]
 license: "LGPL-3.0 with OCaml linking exception"
 homepage: "https://github.com/Chris00/ocaml-cairo"
-dev-repo: "https://github.com/Chris00/ocaml-cairo.git"
+dev-repo: "git+https://github.com/Chris00/ocaml-cairo.git"
 bug-reports: "https://github.com/Chris00/ocaml-cairo/issues"
 doc: "https://Chris00.github.io/ocaml-cairo/doc"
-tags: [ "Cairo" "stroke" "drawing" "tutorial"  ]
+tags: ["Cairo" "stroke" "drawing" "tutorial"]
 build: [
-  [ "dune" "subst" ] {pinned}
-  [ "dune" "build" "-p" name "-j" jobs ]
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
+  ["dune" "build" "@doc"] {with-doc}
 ]
-build-test: [
-  [ "dune" "runtest" "-p" name "-j" jobs ]
-]
-build-doc: [ "dune" "build" "@doc" ]
 depends: [
+  "ocaml" {>= "4.02"}
   "base-bigarray"
   "dune" {build}
   "conf-cairo"
@@ -28,5 +27,9 @@ conflicts: [
   "cairo" {= "0.4.1"}
   "cairo" {= "0.4.2"}
 ]
-available: [ ocaml-version >= "4.02" ]
-
+synopsis: "Binding to Cairo, a 2D Vector Graphics Library"
+description: """
+This is a binding to Cairo, a 2D graphics library with support for
+multiple output devices. Currently supported output targets include
+the X Window System, Quartz, Win32, image buffers, PostScript, PDF,
+and SVG file output."""