json: implement {shortlog} and {changelog} templates

These are the same dispatch function under the hood. The only difference
is the default number of entries to render and the template to use. So
it makes sense to use a shared template.

Format for {changelistentry} is similar to {changeset}. However, there
are differences to argument names and their values preventing us from
(easily) using the same template. (Perhaps there is room to consolidate
the templates as a follow-up.)

We're currently not recording some data in {changelistentry} that exists
in {changeset}. This includes the branch name. This should be added in
a follow-up. For now, something is better than nothing.

mercurial/templates/json/changelist.tmpl

@@ -0,0 +1,5 b''
+\{
+  "node": {node|json},
+  "changeset_count": {changesets|json},
+  "changesets": [{join(entries%changelistentry, ", ")}]
+}

mercurial/templates/json/map

@@ -1,8 +1,19 b''
 mimetype = 'application/json'
 filerevision = '"not yet implemented"'
 search = '"not yet implemented"'
-shortlog = '"not yet implemented"'
-changelog = '"not yet implemented"'
+# changelog and shortlog are the same web API but with different
+# number of entries.
+changelog = changelist.tmpl
+shortlog = changelist.tmpl
+changelistentry = '\{
+  "node": {node|json},
+  "date": {date|json},
+  "desc": {desc|json},
+  "bookmarks": [{join(bookmarks%changelistentryname, ", ")}],
+  "tags": [{join(tags%changelistentryname, ", ")}],
+  "user": {author|json}
+  }'
+changelistentryname = '{name|json}'
 changeset = '\{
   "node": {node|json},
   "date": {date|json},

tests/test-hgweb-json.t

@@ -129,21 +129,298 b' changelog/ shows information about sever'
   $ request json-changelog
   200 Script output follows
   
-  "not yet implemented"
+  {
+    "changeset_count": 10,
+    "changesets": [
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "merge test-branch into default",
+        "node": "cc725e08502a79dd1eda913760fbe06ed7a9abc7",
+        "tags": [
+          "tip"
+        ],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "another commit in test-branch",
+        "node": "ed66c30e87eb65337c05a4229efaa5f1d5285a90",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "create test branch",
+        "node": "6ab967a8ab3489227a83f80e920faa039a71819f",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [
+          "bookmark2"
+        ],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "create tag2",
+        "node": "ceed296fe500c3fac9541e31dad860cb49c89e45",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "another commit to da/foo",
+        "node": "f2890a05fea49bfaf9fb27ed5490894eba32da78",
+        "tags": [
+          "tag2"
+        ],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "create tag",
+        "node": "93a8ce14f89156426b7fa981af8042da53f03aa0",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "move foo",
+        "node": "78896eb0e102174ce9278438a95e12543e4367a7",
+        "tags": [
+          "tag1"
+        ],
+        "user": "test"
+      },
+      {
+        "bookmarks": [
+          "bookmark1"
+        ],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "modify da/foo",
+        "node": "8d7c456572acf3557e8ed8a07286b10c408bcec5",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "modify foo",
+        "node": "f8bbb9024b10f93cdbb8d940337398291d40dea8",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "initial",
+        "node": "06e557f3edf66faa1ccaba5dd8c203c21cc79f1e",
+        "tags": [],
+        "user": "test"
+      }
+    ],
+    "node": "cc725e08502a79dd1eda913760fbe06ed7a9abc7"
+  }
 
-changelog/{revision} shows information about a single changeset
+changelog/{revision} shows information starting at a specific changeset
 
-  $ request json-changelog/06e557f3edf6
+  $ request json-changelog/f8bbb9024b10
   200 Script output follows
   
-  "not yet implemented"
+  {
+    "changeset_count": 10,
+    "changesets": [
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "modify foo",
+        "node": "f8bbb9024b10f93cdbb8d940337398291d40dea8",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "initial",
+        "node": "06e557f3edf66faa1ccaba5dd8c203c21cc79f1e",
+        "tags": [],
+        "user": "test"
+      }
+    ],
+    "node": "f8bbb9024b10f93cdbb8d940337398291d40dea8"
+  }
 
 shortlog/ shows information about a set of changesets
 
   $ request json-shortlog
   200 Script output follows
   
-  "not yet implemented"
+  {
+    "changeset_count": 10,
+    "changesets": [
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "merge test-branch into default",
+        "node": "cc725e08502a79dd1eda913760fbe06ed7a9abc7",
+        "tags": [
+          "tip"
+        ],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "another commit in test-branch",
+        "node": "ed66c30e87eb65337c05a4229efaa5f1d5285a90",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "create test branch",
+        "node": "6ab967a8ab3489227a83f80e920faa039a71819f",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [
+          "bookmark2"
+        ],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "create tag2",
+        "node": "ceed296fe500c3fac9541e31dad860cb49c89e45",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "another commit to da/foo",
+        "node": "f2890a05fea49bfaf9fb27ed5490894eba32da78",
+        "tags": [
+          "tag2"
+        ],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "create tag",
+        "node": "93a8ce14f89156426b7fa981af8042da53f03aa0",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "move foo",
+        "node": "78896eb0e102174ce9278438a95e12543e4367a7",
+        "tags": [
+          "tag1"
+        ],
+        "user": "test"
+      },
+      {
+        "bookmarks": [
+          "bookmark1"
+        ],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "modify da/foo",
+        "node": "8d7c456572acf3557e8ed8a07286b10c408bcec5",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "modify foo",
+        "node": "f8bbb9024b10f93cdbb8d940337398291d40dea8",
+        "tags": [],
+        "user": "test"
+      },
+      {
+        "bookmarks": [],
+        "date": [
+          0.0,
+          0
+        ],
+        "desc": "initial",
+        "node": "06e557f3edf66faa1ccaba5dd8c203c21cc79f1e",
+        "tags": [],
+        "user": "test"
+      }
+    ],
+    "node": "cc725e08502a79dd1eda913760fbe06ed7a9abc7"
+  }
 
 changeset/ renders the tip changeset