Feed. Add information about tag for all versions

[smaant]

It would be useful to know tag not only for the latest version but for all available versions. I suggest adding :tags key into :scm dict like:

{:group-id "group",
 :artifact-id "artifact",
 :description "Some description",
 :scm
 {:connection "scm:git:git://github.com/group/artifact.git",
  :developer-connection "scm:git:ssh://git@github.com/group/artifact.git",
  :tag "29b16d393ae4c27eada2f5c5ca2df8e7ab8da2cb",
  :url "https://github.com/group/artifact",
  ;; --- new key ---
  :tags [{:version "0.1.2-SNAPSHOT" :tag "29b16d393ae4c27eada2f5c5ca2df8e7ab8da2cb"},
         {:version "0.1.1"          :tag null},
         {:version "0.1.0"          :tag "46cc0a88de67f984e8a3bdebd61fc17a2363f4c1"}]},
  ;; ---------------
 :homepage "http://github.com/group/artifact",
 :url "http://github.com/group/artifact",
 :versions ["0.1.2-SNAPSHOT" "0.1.1" "0.1.0"]}

In case of some (or all) version don't have a tag, the value will be null.
Altering is backward compatible and should not affect current users of the feed file.

[danielcompton]

Tag is a bit of an odd word to use here (blame Maven), as the tag is really a commit SHA which doesn't necessarily reference any git tags. However, it probably doesn't make sense to change the terminology.

[smaant]

Yeah, I was thinking about calling it commits too. But, already having the tag here, adding another term for the same thing seemed a bit unreasonable.

[danielcompton]

I agree, I think that consistency with Maven probably makes more sense here.

[tobias]

This data format looks good to me, and I agree that it's probably best to stick with :tag.

[tobias]

:scm-tag is now included in :versions-meta:

{:description "Swank server connecting Clojure to Emacs SLIME"
 :scm {:connection "scm:git:git://github.com/technomancy/swank-clojure.git"
       :developer-connection "scm:git:ssh://git@github.com/technomancy/swank-clojure.git"
       :tag "1e4a12001bb52c4341b9bfbe1d9439cf698bc1e1"
       :url "https://github.com/technomancy/swank-clojure"}
 :homepage "http://github.com/technomancy/swank-clojure"
 :group-id "org.tcrawley"
 :artifact-id "swank-clojure"
 :url "http://github.com/technomancy/swank-clojure"
 :versions ["1.5.0-sd" "1.5.0-sd-SNAPSHOT"]
 :versions-meta [{:version "1.5.0-sd"
                  :release-date #inst "2012-03-08T21:38:31.525000000-00:00"
                  :scm-tag "1e4a12001bb52c4341b9bfbe1d9439cf698bc1e1"}
                 {:version "1.5.0-sd-SNAPSHOT"
                  :release-date #inst "2012-03-02T02:38:34.060000000-00:00"
                  :scm-tag "c9a36c5910c00416e26c698b542b617ac5066ffb"}]}