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if not modules then modules = { } end modules ['mtx-unzip'] = {
version = 1.001,
comment = "companion to mtxrun.lua",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- maybe --pattern
local format = string.format
local helpinfo = [[
--list list files in archive
--junk flatten unzipped directory structure
--extract extract files
]]
local application = logs.application {
name = "mtx-unzip",
banner = "Simple Unzipper 0.10",
helpinfo = helpinfo,
}
local report = application.report
scripts = scripts or { }
scripts.unzipper = scripts.unzipper or { }
function scripts.unzipper.opened()
local filename = environment.files[1]
if filename and filename ~= "" then
filename = file.addsuffix(filename,'zip')
local zipfile = zip.open(filename)
if zipfile then
return zipfile
end
end
report("no zip file: %s",filename)
return false
end
function scripts.unzipper.list()
local zipfile = scripts.unzipper.opened()
if zipfile then
local n = 0
for k in zipfile:files() do
if #k.filename > n then n = #k.filename end
end
local files, paths, compressed, uncompressed = 0, 0, 0, 0
local template_a = "%-"..n.."s"
local template_b = "%-"..n.."s % 9i % 9i"
local template_c = "\n%-"..n.."s % 9i % 9i"
for k in zipfile:files() do
if k.filename:find("/$") then
paths = paths + 1
print(format(template_a, k.filename))
else
files = files + 1
local cs, us = k.compressed_size, k.uncompressed_size
if cs > compressed then
compressed = cs
end
if us > uncompressed then
uncompressed = us
end
print(format(template_b,k.filename,cs,us))
end
end -- check following pattern, n is not enough
print(format(template_c,files .. " files, " .. paths .. " directories",compressed,uncompressed))
end
end
function zip.loaddata(zipfile,filename)
local f = zipfile:open(filename)
if f then
local data = f:read("*a")
f:close()
return data
end
return nil
end
function scripts.unzipper.extract()
local zipfile = scripts.unzipper.opened()
if zipfile then
local junk = environment.arguments["j"] or environment.arguments["junk"]
for k in zipfile:files() do
local filename = k.filename
if filename:find("/$") then
if not junk then
lfs.mkdir(filename)
end
else
local data = zip.loaddata(zipfile,filename)
if data then
if junk then
filename = file.basename(filename)
end
io.savedata(filename,data)
print(filename)
end
end
end
end
end
if environment.arguments["h"] or environment.arguments["help"] then
application.help()
elseif environment.arguments["l"] or environment.arguments["list"] then
scripts.unzipper.list(zipfile)
elseif environment.files[1] then -- implicit --extract
scripts.unzipper.extract(zipfile)
else
application.help()
end
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