1 files changed, 116 insertions, 0 deletions
diff --git a/tools/lint/rst/__init__.py b/tools/lint/rst/__init__.py
new file mode 100644
index 0000000000..7151c09a59
--- /dev/null
+++ b/tools/lint/rst/__init__.py
@@ -0,0 +1,116 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import os
+import re
+import subprocess
+
+from mozfile import which
+from mozlint import result
+from mozlint.pathutils import expand_exclusions
+
+# Error Levels
+# (0, 'debug')
+# (1, 'info')
+# (2, 'warning')
+# (3, 'error')
+# (4, 'severe')
+
+abspath = os.path.abspath(os.path.dirname(__file__))
+rstcheck_requirements_file = os.path.join(abspath, "requirements.txt")
+
+results = []
+
+RSTCHECK_NOT_FOUND = """
+Could not find rstcheck! Install rstcheck and try again.
+
+    $ pip install -U --require-hashes -r {}
+""".strip().format(
+    rstcheck_requirements_file
+)
+
+RSTCHECK_INSTALL_ERROR = """
+Unable to install required version of rstcheck
+Try to install it manually with:
+    $ pip install -U --require-hashes -r {}
+""".strip().format(
+    rstcheck_requirements_file
+)
+
+RSTCHECK_FORMAT_REGEX = re.compile(r"(.*):(.*): \(.*/([0-9]*)\) (.*)$")
+IGNORE_NOT_REF_LINK_UPSTREAM_BUG = re.compile(
+    r"Hyperlink target (.*) is not referenced."
+)
+
+
+def setup(root, **lintargs):
+    virtualenv_manager = lintargs["virtualenv_manager"]
+    try:
+        virtualenv_manager.install_pip_requirements(
+            rstcheck_requirements_file, quiet=True
+        )
+    except subprocess.CalledProcessError:
+        print(RSTCHECK_INSTALL_ERROR)
+        return 1
+
+
+def get_rstcheck_binary():
+    """
+    Returns the path of the first rstcheck binary available
+    if not found returns None
+    """
+    binary = os.environ.get("RSTCHECK")
+    if binary:
+        return binary
+
+    return which("rstcheck")
+
+
+def parse_with_split(errors):
+    match = RSTCHECK_FORMAT_REGEX.match(errors)
+    filename, lineno, level, message = match.groups()
+
+    return filename, lineno, level, message
+
+
+def lint(files, config, **lintargs):
+    log = lintargs["log"]
+    config["root"] = lintargs["root"]
+    paths = expand_exclusions(files, config, config["root"])
+    paths = list(paths)
+    chunk_size = 50
+    binary = get_rstcheck_binary()
+    rstcheck_options = [
+        "--ignore-language=cpp,json",
+        "--ignore-roles=searchfox",
+    ]
+
+    while paths:
+        cmdargs = [which("python"), binary] + rstcheck_options + paths[:chunk_size]
+        log.debug("Command: {}".format(" ".join(cmdargs)))
+
+        proc = subprocess.Popen(
+            cmdargs,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            env=os.environ,
+            universal_newlines=True,
+        )
+        all_errors = proc.communicate()[1]
+        for errors in all_errors.split("\n"):
+            if len(errors) > 1:
+                filename, lineno, level, message = parse_with_split(errors)
+                if not IGNORE_NOT_REF_LINK_UPSTREAM_BUG.match(message):
+                    # Ignore an upstream bug
+                    # https://github.com/myint/rstcheck/issues/19
+                    res = {
+                        "path": filename,
+                        "message": message,
+                        "lineno": lineno,
+                        "level": "error" if int(level) >= 2 else "warning",
+                    }
+                    results.append(result.from_config(config, **res))
+        paths = paths[chunk_size:]
+
+    return results