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Copy pathcodegrep
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executable file
·308 lines (279 loc) · 8.76 KB
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#!/usr/bin/env lua
local arg = {...}
local options = {
word = false,
insensitive = true,
comments = false,
strings = false,
keys = false,
recursive = true,
}
local set_options = {
["-w"] = "word",
["-i"] = "insensitive",
["-c"] = "comments",
["-s"] = "strings",
["-k"] = "keys",
["-r"] = "recursive",
}
repeat
local set = false
for i, a in ipairs(arg) do
if a == "--help" then
options.help = true
set = false
break
end
if a:sub(1,1) == "-" and #a > 2 then
table.remove(arg, i)
for i = 2, #a do
table.insert(arg, "-"..a:sub(i,i))
end
set = true
break
end
if a == "--" then
table.remove(arg, i)
set = false
break
end
local is_set = set_options[a]
if is_set then
table.remove(arg, i)
options[is_set] = true
set = true
break
end
local is_unset = set_options[a:lower()]
if is_unset then
table.remove(arg, i)
options[is_unset] = false
set = true
break
end
end
until not set
if options.help or #arg == 0 then
print([[
codegrep - a grep-like tool tailored for code
codegrep is like grep, but it is able to skip comments and strings in the code.
Usage:
codegrep [-wWiIcCsS] <pattern> [files...]
Pattern is a Lua pattern, which is similar to regex but not the same,
except that '-' is taken literally.
Source files supported are: *.c *.h *.lua *.java *.grace *.js *.html
If files are not given, it recursively searches for source files in the
current directory (-r is accepted for compatibility but ignored).
Options:
-w -W Enable or disable whole-word search (default is off)
-i -I Enable or disable case-insensitive search (default is on)
-c -C Enable or disable search in comments (default is off: skips comments)
-s -S Enable or disable search in strings (default is off: skips strings)
-k -K Enable or disable search in key-like strings, that is, strings
containing only the search term (default is off: skips those strings)
Example:
codegrep -wc read
Looks for the word read in all source files of the tree, including comments.
]])
os.exit(0)
end
local pattern = arg[1]
table.remove(arg, 1)
pattern = pattern:gsub("%-", "%%-")
if options.insensitive then
pattern = pattern:lower()
end
if #arg == 0 then
for name in io.popen("find . -type f -and '(' -name '*.[ch]' -or -name '*.lua' -or -name '*.cpp' -or -name '*.hh' -or -name '*.cc' -or -name '*.java' -or -name '*.grace' -or -name '*.grc' -or -name '*.js' -or -name '*.html' -or -name '*.htm' ')'"):lines() do
table.insert(arg, name)
end
end
local function single_line_cut(line, marker, except)
local sc = line:find(marker, 1, true)
if sc then
if except then
if line:sub(sc, sc+#except-1) == except then
return line
end
end
line = line:sub(1, sc - 1)
end
return line
end
local function check_key(s)
if options.insensitive then
s = s:lower()
end
return s:match("^"..pattern.."$")
end
local function multi_line_cut(line, opener, closer)
local comment = false
local cc = 1
while true do
local mc = line:find(opener, cc, true)
if mc then
cc = line:find(closer, mc+#opener, true)
if cc then
if ((not options.keys) or not check_key(line:sub(mc+#opener, cc-1))) then
line = line:sub(1, mc - 1)..(" "):rep(cc + #closer - mc)..line:sub(cc + #closer, -1)
end
cc = cc + #closer
else
line = line:sub(1, mc - 1)
comment = true
break
end
else
break
end
end
return line, comment
end
local function in_multi_line(line, closer)
local comment = true
local cc = line:find(closer, 1, true)
if cc then
line = (" "):rep(cc + 1)..line:sub(cc + #closer, -1)
comment = false
else
line = ""
end
return line, comment
end
local function single_and_multi_cuts(line, comment, mopen, mclose, sopen, sexcept)
if comment then
line, comment = in_multi_line(line, mclose)
end
if not comment then
line = single_line_cut(line, sopen, sexcept)
line, comment = multi_line_cut(line, mopen, mclose)
end
if comment then
line = single_line_cut(line, sopen, sexcept)
end
return line, comment
end
local found_any = false
local styles = {
c = "c",
cpp = "c",
cc = "c",
hh = "c",
h = "c",
java = "c",
js = "c",
grace = "grace",
grc = "grace",
lua = "lua",
html = "html",
htm = "html",
}
for _, name in ipairs(arg) do
local file = io.open(name)
if file then
local ext = name:match("%.([^%.]*)$")
local style = styles[ext]
local comment = false
local multistring = false
local n = 1
local htmlmode = "html"
for line in file:lines() do
local orig = line
if not options.comments then
if style == "c" then
line, comment = single_and_multi_cuts(line, comment, "/*", "*/", "//")
elseif style == "grace" then
if not comment then
line = single_line_cut(line, "//")
end
elseif style == "lua" then
line, comment = single_and_multi_cuts(line, comment, "--[[", "]]", "--", "--[[")
elseif style == "html" then
if htmlmode == "html" then
if not comment then
line, comment = multi_line_cut(line, "<!--", "-->")
else
line, comment = in_multi_line(line, "-->")
end
if not comment then
local in_js
line, in_js = multi_line_cut(line, "<script", "</script>")
if in_js then
htmlmode = "js"
else
local in_css
line, in_css = multi_line_cut(line, "<style", "</style>")
if in_css then
htmlmode = "css"
end
end
end
elseif htmlmode == "js" then
line, comment = single_and_multi_cuts(line, comment, "/*", "*/", "//")
local in_js
_, in_js = in_multi_line(line, "</script>")
if not in_js then
htmlmode = "html"
end
elseif htmlmode == "css" then
line, comment = single_line_cut(line, "//")
local in_css
_, in_css = in_multi_line(line, "</style>")
if not in_css then
htmlmode = "html"
end
end
end
end
if not options.strings then
if style == "c" then
line = multi_line_cut(line, '"', '"')
line = multi_line_cut(line, "'", "'")
elseif style == "grace" then
line = multi_line_cut(line, '"', '"')
elseif style == "lua" then
if multistring then
line, multistring = in_multi_line(line, ']]')
end
if not multistring then
line = multi_line_cut(line, '"', '"')
line, multistring = multi_line_cut(line, '[[', ']]')
end
elseif style == "html" then
if htmlmode == "js" then
line = multi_line_cut(line, '"', '"')
line = multi_line_cut(line, "'", "'")
end
end
end
if options.insensitive then
line = line:lower()
end
local show = false
local starts, stops = {}, {}
for start, _, stop in line:gmatch("()("..pattern..")()") do
if (not options.word) or ((not line:sub(start-1,start-1):match("[%w_]")) and (not line:sub(stop,stop):match("[%w_]"))) then
table.insert(starts, start)
table.insert(stops, stop)
show = true
end
end
if show then
local out = { "\27[1;35m", name, " \27[1;32m", tostring(n), ":\27[0m" }
local at = 1
for i=1, #starts do
table.insert(out, orig:sub(at, starts[i]-1))
table.insert(out, "\27[1;31m")
table.insert(out, orig:sub(starts[i], stops[i]-1))
table.insert(out, "\27[0m")
at = stops[i]
end
table.insert(out, orig:sub(at, -1))
print(table.concat(out))
found_any = true
end
n = n + 1
end
end
end
os.exit(found_any and 0 or 1)