[src/trunk]: src/usr.bin/xlint/lint1 lint: check messages and their IDs for c...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ac5643e5e5ce
branches:  trunk
changeset: 979537:ac5643e5e5ce
user:      rillig <rillig%NetBSD.org@localhost>
date:      Thu Dec 31 22:48:33 2020 +0000

description:
lint: check messages and their IDs for consistency

diffstat:

 usr.bin/xlint/lint1/check-msgs.lua |  102 +++++++++++++++++++++++++++++++++++++
 1 files changed, 102 insertions(+), 0 deletions(-)

diffs (106 lines):

diff -r f2533f89273d -r ac5643e5e5ce usr.bin/xlint/lint1/check-msgs.lua
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/usr.bin/xlint/lint1/check-msgs.lua        Thu Dec 31 22:48:33 2020 +0000
@@ -0,0 +1,102 @@
+#! /usr/bin/lua
+-- $NetBSD: check-msgs.lua,v 1.1 2020/12/31 22:48:33 rillig Exp $
+
+--[[
+
+Check that the message text in the C source matches the actual user-visible
+message text.
+
+usage: ./check-diagnostics *.c
+
+]]
+
+
+local function load_messages(fname)
+  local msgs = {}
+
+  local f = assert(io.open(fname, "r"))
+  for line in f:lines() do
+    local msg, id = line:match("%s*\"(.+)\",%s*/%*%s*(%d+)%s*%*/$")
+    if msg ~= nil then
+      msgs[tonumber(id)] = msg
+    end
+  end
+
+  f:close()
+
+  return msgs
+end
+
+
+local function check_message(fname, lineno, id, comment, msgs, errors)
+  local msg = msgs[id]
+
+  if msg == nil then
+    errors:add("%s:%d: id=%d not found", fname, lineno, id)
+    return
+  end
+
+  if comment == msg then
+    return
+  end
+
+  local prefix = comment:match("(.*) %.%.%.$")
+  if prefix ~= nil and msg:find(prefix) == 1 then
+    return
+  end
+
+  errors:add("%s:%d:   id=%-3d   msg=%-40s   comment=%s",
+    fname, lineno, id, msg, comment)
+end
+
+
+local function collect_errors(fname, msgs)
+  local errors = {}
+  errors.add = function(self, fmt, ...)
+    table.insert(self, string.format(fmt, ...))
+  end
+  local f = assert(io.open(fname, "r"))
+  local lineno = 0
+  local prev = ""
+  for line in f:lines() do
+    lineno = lineno + 1
+
+    local id = line:match("^%s+warning%((%d+)[),]")
+    if id == nil then
+      id = line:match("^%s+error%((%d+)[),]")
+    end
+    if id ~= nil then
+      local comment = prev:match("^%s+/%*%s+(.+)%s+%*/$")
+      if comment ~= nil then
+        check_message(fname, lineno, tonumber(id), comment, msgs, errors)
+      end
+    end
+
+    prev = line
+  end
+
+  f:close()
+
+  return errors
+end
+
+
+local function check_file(fname, msgs)
+  local errors = collect_errors(fname, msgs)
+  for _, err in ipairs(errors) do
+    print(err)
+  end
+  return #errors == 0
+end
+
+
+local function main(arg)
+  local msgs = load_messages("err.c")
+  local ok = true
+  for _, fname in ipairs(arg) do
+    ok = check_file(fname, msgs) and ok
+  end
+  return ok
+end
+
+os.exit(main(arg))