fill in missing opam description fields

Signed-off-by: Anil Madhavapeddy <[email protected]>

datakit-client-9p.opam

@@ -21,3 +21,6 @@ depends: [
 build: ["dune" "build" "-p" name "-j" jobs]
 dev-repo: "git+https://github.com/moby/datakit.git"
 synopsis: "A library for Datakit clients over 9P"
+description: """
+Connect to DataKit clients using the 9P filesystem protocol.
+"""

datakit-client-git.opam

@@ -24,3 +24,7 @@ build: [
 ]
 dev-repo: "git+https://github.com/moby/datakit.git"
 synopsis: "A library for connecting Datakit client using Git"
+description: """
+This library allows for creating DataKit clients that
+use the Git protocol for communication.
+"""

datakit-github.opam

@@ -23,3 +23,7 @@ depends: [
 build: ["dune" "build" "-p" name "-j" jobs]
 dev-repo: "git+https://github.com/moby/datakit.git"
 synopsis: "Abstraction of the GitHub API, suitable for DataKit clients"
+description: """
+This library exposes the GitHub REST API over the
+DataKit filesystem layer.
+"""

datakit-server-9p.opam

@@ -18,3 +18,7 @@ depends: [
 build: ["dune" "build" "-p" name "-j" jobs]
 dev-repo: "git+https://github.com/moby/datakit.git"
 synopsis: "Build Datakit servers using the 9P filesystem protocol"
+description: """
+This library allows for the construction of DataKit servers
+that can be accessed over the 9P filesystem protocol.
+"""

datakit.opam

@@ -45,3 +45,15 @@ build: [
 ]
 dev-repo: "git+https://github.com/moby/datakit.git"
 synopsis: "Orchestrate applications using a Git-like dataflow"
+description: """
+DataKit is a tool to orchestrate applications using a Git-like dataflow. It
+revisits the UNIX pipeline concept, with a modern twist: streams of
+tree-structured data instead of raw text. DataKit allows you to define complex
+build pipelines over version-controlled data.
+
+DataKit is currently used as the coordination
+layer for [HyperKit](http://github.com/docker/hyperkit), the
+hypervisor component of
+[Docker for Mac and Windows](https://blog.docker.com/2016/03/docker-for-mac-windows-beta/), and
+for the DataKitCI continuous integration system.
+"""