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|
-- $NetBSD: t_options.lua,v 1.7 2023/06/26 12:21:18 rillig Exp $
--
-- Copyright (c) 2023 The NetBSD Foundation, Inc.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
-- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
-- BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
-- usage: [INDENT=...] lua t_options.lua <file>...
--
-- Test driver for indent that runs indent on several inputs, checks the
-- output and can run indent with different command line options on the same
-- input.
--
-- The test files contain the input to be formatted, the formatting options
-- and the output, all as close together as possible. The test files use the
-- following directives:
--
-- //indent input
-- Specifies the input to be formatted.
-- //indent run [options]
-- Runs indent on the input, using the given options.
-- //indent end
-- Finishes an '//indent input' or '//indent run' section.
-- //indent run-equals-input [options]
-- Runs indent on the input, expecting unmodified output.
-- //indent run-equals-prev-output [options]
-- Runs indent on the input, expecting the same output as from
-- the previous run.
--
-- All text outside input..end or run..end directives is not passed to indent.
--
-- Inside the input..end or run..end sections, comments that start with '$'
-- are filtered out, they can be used for remarks near the affected code.
--
-- The actual output from running indent is written to stdout, the expected
-- test output is written to 'expected.out'.
local warned = false
local filename = ""
local lineno = 0
local prev_empty_lines = 0 -- the finished "block" of empty lines
local curr_empty_lines = 0 -- the ongoing "block" of empty lines
local max_empty_lines = 0 -- between sections
local seen_input_section = false-- the first input section is not checked
local section = "" -- "", "input" or "run"
local section_excl_comm = "" -- without dollar comments
local section_incl_comm = "" -- with dollar comments
local input_excl_comm = "" -- the input text for indent
local input_incl_comm = "" -- used for duplicate checks
local unused_input_lineno = 0
local output_excl_comm = "" -- expected output
local output_incl_comm = "" -- used for duplicate checks
local output_lineno = 0
local expected_out = assert(io.open("expected.out", "w"))
local function die(ln, msg)
io.stderr:write(("%s:%d: error: %s\n"):format(filename, ln, msg))
os.exit(false)
end
local function warn(ln, msg)
io.stderr:write(("%s:%d: warning: %s\n"):format(filename, ln, msg))
warned = true
end
local function init_file(fname)
filename = fname
lineno = 0
prev_empty_lines = 0
curr_empty_lines = 0
max_empty_lines = 0
seen_input_section = false
section = ""
section_excl_comm = ""
section_incl_comm = ""
input_excl_comm = ""
input_incl_comm = ""
unused_input_lineno = 0
output_excl_comm = ""
output_incl_comm = ""
output_lineno = 0
end
local function check_empty_lines_block(n)
if max_empty_lines ~= n and seen_input_section then
local lines = n ~= 1 and "lines" or "line"
warn(lineno, ("expecting %d empty %s, got %d")
:format(n, lines, max_empty_lines))
end
end
local function check_unused_input()
if unused_input_lineno ~= 0 then
warn(unused_input_lineno, "input is not used")
end
end
local function run_indent(inp, args)
local indent = os.getenv("INDENT") or "indent"
local cmd = indent .. " " .. args .. " 2>t_options.err"
local indent_in = assert(io.popen(cmd, "w"))
indent_in:write(inp)
local ok, kind, info = indent_in:close()
if not ok then
print("// " .. kind .. " " .. info)
end
for line in io.lines("t_options.err") do
print("// " .. line)
end
end
local function handle_empty_section(line)
if line == "" then
curr_empty_lines = curr_empty_lines + 1
else
if curr_empty_lines > max_empty_lines then
max_empty_lines = curr_empty_lines
end
if curr_empty_lines > 0 then
if prev_empty_lines > 1 then
warn(lineno - curr_empty_lines - 1,
prev_empty_lines .. " empty lines a few "
.. "lines above, should be only 1")
end
prev_empty_lines = curr_empty_lines
end
curr_empty_lines = 0
end
end
local function handle_indent_input()
if prev_empty_lines ~= 2 and seen_input_section then
warn(lineno, "input section needs 2 empty lines "
.. "above, not " .. prev_empty_lines)
end
check_empty_lines_block(2)
check_unused_input()
section = "input"
section_excl_comm = ""
section_incl_comm = ""
unused_input_lineno = lineno
seen_input_section = true
output_excl_comm = ""
output_incl_comm = ""
output_lineno = 0
end
local function handle_indent_run(args)
if section ~= "" then
warn(lineno, "unfinished section '" .. section .. "'")
end
check_empty_lines_block(1)
if prev_empty_lines ~= 1 then
warn(lineno, "run section needs 1 empty line above, "
.. "not " .. prev_empty_lines)
end
section = "run"
output_lineno = lineno
section_excl_comm = ""
section_incl_comm = ""
run_indent(input_excl_comm, args)
unused_input_lineno = 0
end
local function handle_indent_run_equals_input(args)
check_empty_lines_block(1)
run_indent(input_excl_comm, args)
expected_out:write(input_excl_comm)
unused_input_lineno = 0
max_empty_lines = 0
output_incl_comm = ""
output_excl_comm = ""
end
local function handle_indent_run_equals_prev_output(args)
if output_incl_comm == "" then
warn(lineno,
"no previous output; use run-equals-input instead")
end
check_empty_lines_block(1)
run_indent(input_excl_comm, args)
expected_out:write(output_excl_comm)
max_empty_lines = 0
end
local function handle_indent_end_input()
if section_incl_comm == input_incl_comm then
warn(lineno, "duplicate input; remove this section")
end
input_excl_comm = section_excl_comm
input_incl_comm = section_incl_comm
section = ""
max_empty_lines = 0
end
local function handle_indent_end_run()
if section_incl_comm == input_incl_comm then
warn(output_lineno,
"output == input; use run-equals-input")
end
if section_incl_comm == output_incl_comm then
warn(output_lineno,
"duplicate output; use run-equals-prev-output")
end
output_excl_comm = section_excl_comm
output_incl_comm = section_incl_comm
section = ""
max_empty_lines = 0
end
local function handle_indent_directive(line, command, args)
print(line)
expected_out:write(line .. "\n")
if command == "input" and args ~= "" then
warn(lineno, "'//indent input' does not take arguments")
elseif command == "input" then
handle_indent_input()
elseif command == "run" then
handle_indent_run(args)
elseif command == "run-equals-input" then
handle_indent_run_equals_input(args)
elseif command == "run-equals-prev-output" then
handle_indent_run_equals_prev_output(args)
elseif command == "end" and args ~= "" then
warn(lineno, "'//indent end' does not take arguments")
elseif command == "end" and section == "input" then
handle_indent_end_input()
elseif command == "end" and section == "run" then
handle_indent_end_run()
elseif command == "end" then
warn(lineno, "misplaced '//indent end'")
else
die(lineno, "invalid line '" .. line .. "'")
end
prev_empty_lines = 0
curr_empty_lines = 0
end
local function handle_line(line)
if section == "" then
handle_empty_section(line)
end
-- Hide comments starting with dollar from indent; they are used for
-- marking bugs and adding other remarks directly in the input or
-- output sections.
if line:match("^%s*/[*]%s*[$].*[*]/$")
or line:match("^%s*//%s*[$]") then
if section ~= "" then
section_incl_comm = section_incl_comm .. line .. "\n"
end
return
end
local cmd, args = line:match("^//indent%s+([^%s]+)%s*(.*)$")
if cmd then
handle_indent_directive(line, cmd, args)
return
end
if section == "input" or section == "run" then
section_excl_comm = section_excl_comm .. line .. "\n"
section_incl_comm = section_incl_comm .. line .. "\n"
end
if section == "run" then
expected_out:write(line .. "\n")
end
if section == ""
and line ~= ""
and line:sub(1, 1) ~= "/"
and line:sub(1, 2) ~= " *" then
warn(lineno, "non-comment line outside 'input' or 'run' "
.. "section")
end
end
local function handle_file(fname)
init_file(fname)
local f = assert(io.open(fname))
for line in f:lines() do
lineno = lineno + 1
handle_line(line)
end
f:close()
end
local function main()
for _, arg in ipairs(arg) do
handle_file(arg)
end
if section ~= "" then
die(lineno, "still in section '" .. section .. "'")
end
check_unused_input()
expected_out:close()
os.exit(not warned)
end
main()
|