contrib/github_merge.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Query the Github PR API to perform a merge
  16 module github_merge
  17
  18 import github::github_curl
  19 import template
  20 import opts
  21
  22 redef class Object
  23         # Factorize cast
  24         fun json_as_a: JsonArray do return self.as(JsonArray)
  25         # Factorize cast
  26         fun json_as_map: JsonObject do return self.as(JsonObject)
  27 end
  28
  29 redef class GithubCurl
  30         # Get a given pull request (PR)
  31         fun getpr(repo: String, number: Int): nullable JsonObject
  32         do
  33                 var ir = get_and_check("https://api.github.com/repos/{repo}/issues/{number}")
  34                 var irm = ir.json_as_map
  35                 if not irm.has_key("pull_request") then return null
  36                 var pr = get_and_check("https://api.github.com/repos/{repo}/pulls/{number}")
  37                 var prm = pr.json_as_map
  38                 var sha = prm["head"].json_as_map["sha"].to_s
  39                 var statuses = get_and_check("https://api.github.com/repos/{repo}/statuses/{sha}")
  40                 prm["statuses"] = statuses
  41                 print "{prm["title"].to_s}: by {prm["user"].json_as_map["login"].to_s} (# {prm["number"].to_s})"
  42                 var mergeable = prm["mergeable"]
  43                 if mergeable != null then
  44                         print "\tmergeable: {mergeable.to_s}"
  45                 else
  46                         print "\tmergeable: unknown"
  47                 end
  48                 var st = prm["statuses"].json_as_a
  49                 if not st.is_empty then
  50                         print "\tstatus: {st[0].json_as_map["state"].to_s}"
  51                 else
  52                         print "\tstatus: not tested"
  53                 end
  54                 return prm
  55         end
  56
  57         # Get reviewers of a PR
  58         fun getrev(repo: String, pr: JsonObject): Array[String]
  59         do
  60                 var number = pr["number"].as(Int)
  61                 var user = pr["user"].json_as_map["login"].as(String)
  62                 var comments = new Array[nullable Object]
  63                 comments.add_all(get_and_check("https://api.github.com/repos/{repo}/issues/{number}/comments").json_as_a)
  64                 comments.add_all(get_and_check("https://api.github.com/repos/{repo}/pulls/{number}/comments").json_as_a)
  65                 var logins = new Array[String]
  66                 for c in comments do
  67                         var cm = c.json_as_map
  68                         var l = cm["user"].json_as_map["login"]
  69                         assert l isa String
  70                         if l != user and not logins.has(l) then logins.add(l)
  71                 end
  72                 var res = new Array[String]
  73                 for l in logins do
  74                         var u = get_and_check("https://api.github.com/users/{l}").json_as_map
  75                         if not u.has_key("name") or u["name"] == null or not u.has_key("email")or u["email"] == null then
  76                                 print "No public name/email for user {l}"
  77                                 continue
  78                         end
  79                         var r = "{u["name"].to_s} <{u["email"].to_s}>"
  80                         res.add r
  81
  82                 end
  83                 return res
  84         end
  85
  86 end
  87
  88 if "NIT_TESTING".environ == "true" then exit 0
  89
  90 var opt_repo = new OptionString("Repository (e.g. nitlang/nit)", "-r", "--repo")
  91 var opt_auth = new OptionString("OAuth token", "--auth")
  92 var opt_query = new OptionString("Query to get issues (e.g. label=ok_will_merge)", "-q", "--query")
  93 var opt_keepgoing = new OptionBool("Skip merge conflicts", "-k", "--keep-going")
  94 var opts = new OptionContext
  95 opts.add_option(opt_repo, opt_auth, opt_query, opt_keepgoing)
  96
  97 opts.parse(sys.args)
  98 var args = opts.rest
  99
 100 var auth = opt_auth.value or else ""
 101 if auth == "" then auth = get_github_oauth
 102 if auth == "" then
 103         print "Warning: no github oauth token, you can configure one with"
 104         print "    git config --add github.oauthtoken MYOAUTHTOKEN"
 105 end
 106
 107 var repo = opt_repo.value or else "nitlang/nit"
 108
 109 var query = opt_query.value or else "labels=ok_will_merge"
 110
 111 var curl = new GithubCurl(auth, "Merge-o-matic (nitlang/nit)")
 112
 113 if args.is_empty then
 114         # Without args, list `ok_will_merge`
 115         var x = curl.get_and_check("https://api.github.com/repos/{repo}/issues?{query}")
 116         for y in x.json_as_a do
 117                 var number = y.json_as_map["number"].as(Int)
 118                 curl.getpr(repo, number)
 119         end
 120         return
 121 end
 122
 123 for arg in args do
 124         # With a arg, merge the PR
 125         var number = arg.to_i
 126         var pr = curl.getpr(repo, number)
 127         if pr == null then
 128                 print "Not a PR: {number}"
 129                 return
 130         end
 131         var revs = curl.getrev(repo, pr)
 132
 133         var mergemsg = new Template
 134         mergemsg.add "Merge: {pr["title"].to_s}\n\n"
 135         mergemsg.add "{pr["body"].to_s}\n\n"
 136         mergemsg.add "Pull-Request: #{pr["number"].to_s}\n"
 137         for r in revs do
 138                 mergemsg.add "Reviewed-by: {r}\n"
 139         end
 140         mergemsg.write_to_file("mergemsg")
 141
 142         var sha = pr["head"].json_as_map["sha"].as(String)
 143         if system("git show -s --pretty=format:%h {sha}") != 0 then
 144                 print "Commit {sha} not in local repository; did you fetch github?"
 145                 return
 146         end
 147         if system("git merge-base --is-ancestor {sha} HEAD") == 0 then
 148                 print "Is already merged."
 149                 continue
 150         end
 151         if system("git merge --no-ff --no-commit {sha}") != 0 then
 152                 if opt_keepgoing.value then
 153                          system("git reset --merge")
 154                          continue
 155                 end
 156                 system("cp mergemsg `git rev-parse --git-dir`/MERGE_MSG")
 157                 print "Problem during merge... Let's do the commit manually."
 158                 return
 159         end
 160         system("git commit -F mergemsg")
 161         print "The merge is made"
 162         mergemsg.write_to(stdout)
 163 end
 164