lint: Check for long lines in all markdown files in general.

This has a few excludes for cases involving code blocks where it would
have been difficult to clean up.

docs/dev-setup-non-vagrant.md

@@ -111,7 +111,9 @@ git](https://github.com/zulip/tsearch_extras).
 
 Now continue with the [All Systems](#all-systems) instructions below.
 
-#### Using the [official Zulip PPA](https://launchpad.net/~tabbott/+archive/ubuntu/zulip/+packages) (for 14.04 Trusty or 16.04 Xenial):
+#### Using the [official Zulip PPA][zulip-ppa] (for 14.04 Trusty or 16.04 Xenial):
+
+[zulip-ppa]: https://launchpad.net/~tabbott/+archive/ubuntu/zulip/+packages
 
 Start by cloning this repository: `git clone
 https://github.com/zulip/zulip.git`

docs/new-feature-tutorial.md

@@ -102,7 +102,9 @@ Create the migration file: `./manage.py makemigrations`. Make sure to
 commit the generated file to git: `git add zerver/migrations/NNNN_realm_invite_by_admins_only.py`
 (NNNN is a number that is equal to the number of migrations.)
 
-If you run into problems, the [Django migration documentation](https://docs.djangoproject.com/en/1.8/topics/migrations/) is helpful.
+If you run into problems, the
+[Django migration documentation](https://docs.djangoproject.com/en/1.8/topics/migrations/)
+is helpful.
 
 ### Test your migration changes
 

docs/prod-postgres.md

@@ -116,7 +116,8 @@ won't find any information there. pg_ctlcluster runs the following
 command underneath when it actually goes to start Postgres:
 
 ```
-/usr/lib/postgresql/9.1/bin/pg_ctl start -D /var/lib/postgresql/9.1/main -s -o  '-c config_file="/etc/postgresql/9.1/main/postgresql.conf"'
+/usr/lib/postgresql/9.1/bin/pg_ctl start -D /var/lib/postgresql/9.1/main -s -o \
+    '-c config_file="/etc/postgresql/9.1/main/postgresql.conf"'
 ```
 
 Since pg_ctl doesn't redirect stdout or stderr, running the above can

docs/roadmap.md

@@ -77,7 +77,8 @@ the end of 2016.
   "reactions"](https://github.com/zulip/zulip/issues/541)
 * [Open graph previews of generic
   websites](https://github.com/zulip/zulip/issues/406)
-* [Add a "join Zulip chat" badge for projects that use Zulip to document that nicely](https://github.com/zulip/zulip/issues/2270)
+* [Add a "join Zulip chat" badge for projects that use Zulip to
+  document that nicely](https://github.com/zulip/zulip/issues/2270)
 
 ## Real-time sync
 
@@ -217,8 +218,10 @@ process and make bots that receive messages just as easy to build.
 
 * [Add an outgoing webhook integration system](https://github.com/zulip/zulip/issues/735)
 * [Make setting up a new integration a smooth flow](https://github.com/zulip/zulip/issues/692)
-* [Default new incoming webhooks to permissions-limited incoming webhook bots](https://github.com/zulip/zulip/issues/2186)
-* [Change how Zulip displays bot names to distinguish them from human users](https://github.com/zulip/zulip/issues/1107)
+* [Default new incoming webhooks to permissions-limited incoming webhook
+  bots](https://github.com/zulip/zulip/issues/2186)
+* [Change how Zulip displays bot names to distinguish them from human
+  users](https://github.com/zulip/zulip/issues/1107)
 
 ## Android app
 

docs/writing-views.md

@@ -87,8 +87,8 @@ redirects the browser to a login page. This is used in the root path
 (`/`) of the website for the web client. If a request comes from a
 browser without a valid session cookie, they are redirected to a login
 page.  It is a small fork of Django's
-[login_required](https://docs.djangoproject.com/en/1.8/topics/auth/default/#django.contrib.auth.decorators.login_required),
-adding a few extra checks specific to Zulip.
+[login_required][login-required-link], adding a few extra checks
+specific to Zulip.
 
 ```py
 @zulip_login_required
@@ -96,6 +96,8 @@ def home(request):
     # type: (HttpRequest) -> HttpResponse
 ```
 
+[login-required-link]: https://docs.djangoproject.com/en/1.8/topics/auth/default/#django.contrib.auth.decorators.login_required
+
 ### Writing a template
 
 Templates for the main website are found in
@@ -109,7 +111,8 @@ request bodies, and return JSON-string responses.  Almost all Zulip
 view code is in the implementations of API REST endpoints.
 
 The REST API does authentication of the user through `rest_dispatch`,
-which is documented in detail at [zerver/lib/rest.py](https://github.com/zulip/zulip/blob/master/zerver/lib/rest.py).
+which is documented in detail at
+[zerver/lib/rest.py](https://github.com/zulip/zulip/blob/master/zerver/lib/rest.py).
 This method will authenticate the user either through a session token
 from a cookie on the browser, or from a base64 encoded `email:api-key`
 string given via HTTP Basic Auth for API clients.

tools/lint-all

@@ -159,6 +159,7 @@ def build_custom_checkers(by_lang):
                     traceback.print_exc()
             if (max_length is not None and len(line) > max_length and
                 '# type' not in line and 'test' not in fn and 'example' not in fn and
+                not re.match("\[[a-z0-9_-]*\]: http.*", line) and
                     "#ignorelongline" not in line and 'migrations' not in fn):
                 print("Line too long (%s) at %s line %s: %s" % (len(line), fn, i+1, line_newline_stripped))
             lastLine = line
@@ -435,9 +436,20 @@ def build_custom_checkers(by_lang):
             if custom_check_file(fn, json_rules):
                 failed = True
 
+        markdown_docs_length_exclude = {
+            "contrib_bots/lib/ConverterBot/docs.md",
+            "docs/bots-guide.md",
+            "docs/dev-env-first-time-contributors.md",
+            "docs/integration-guide.md",
+            "docs/life-of-a-request.md",
+            "docs/logging.md",
+            "docs/migration-renumbering.md",
+            "docs/readme-symlink.md",
+            "README.md",
+        }
         for fn in by_lang['md']:
             max_length = None
-            if '/help/' in fn:
+            if fn not in markdown_docs_length_exclude:
                 max_length = 120
             if custom_check_file(fn, markdown_rules, max_length=max_length):
                 failed = True