Lua Requires Chilkat v11.0.0+

Set Entry Filepath (in output Zip) when Zipping

Demonstrates how to set the path for the file entry within the .zip to something different than the path in the filesystem. Lua

local chilkat = require("chilkat")

-- This requires the Chilkat Zip API to have been previously unlocked.
-- See Unlock Chilkat Zip for sample code.

local zip = chilkat.Zip.new()

local success = zip:new_zip("qa_output/zipA.zip")

-- When an absolute filepath is passed to AddFile, the path within the .zip
-- will be one of two values:  (1) just the filename part if saveExtraPath is false,
-- or (2) the full absolute path, but made relative, if saveExtraPath is true.
-- (For example, "c:/ck2000/appData/UnitTest/qa_data/hamlet.xml" made relative is
-- "ck2000/appData/UnitTest/qa_data/hamlet.xml")
local saveExtraPath = false
success = zip:add_file("c:/ck2000/appData/UnitTest/qa_data/hamlet.xml", saveExtraPath)
if not success then
    print(zip.last_error_text)
    return
end

-- When a relative path is passed to AddFile, then saveExtraPath does not apply.
-- For example, assume our current working directory is "c:/ck2000/appData/UnitTest".  The following
-- call to AddFile creates an entry with the filepath "qa_data/hamlet.xml".
success = zip:add_file("qa_data/hamlet.xml", saveExtraPath)
if not success then
    print(zip.last_error_text)
    return
end

-- Examine the entries
local entry = chilkat.ZipEntry.new()
local numEntries = zip.num_entries
local i = 0
while i < numEntries do
    zip:entry_at(i, entry)
    print(i .. ": " .. entry.file_name)
    i = i + 1
end

-- The output so far is:

--     0: hamlet.xml
--     1: qa_data/hamlet.xml

-- If we write the .zip as-is, then the zip will have two entries
-- with the filepaths as shown above.

-- This writes "qa_output/zipA.zip"
success = zip:write_zip()

-- Now change the entry filepaths to whatever is desired.
success = zip:entry_of("hamlet.xml", entry)
if not success then
    print("entry not found")
    return
end

entry.file_name = "Shakespeare/Claudius1.xml"

success = zip:entry_of("qa_data/hamlet.xml", entry)
if not success then
    print("entry not found")
    return
end

entry.file_name = "Shakespeare/Claudius2.xml"

-- Change the name of the .zip to be written and write again:
zip.file_name = "qa_output/zipB.zip"
success = zip:write_zip_and_close()
if not success then
    print(zip.last_error_text)
else
    print("Zip created!")
end

-- Examine both zipA.zip and zipB.zip using 7zip (or another tool) to see the differences.