build.hashers.mtime

Special meaning of keys?

No, but they must have an associated file name.

This simple hasher will record the modification times of a key and mark it as dirty if it changes.

Usage

local Hasher = require "build.hashers.mtime" (Posix_File_System, File_Of_Key)
local hasher = Hasher.create(posix_file_system)

• Posix_File_System must be the POSIX file system structure to use.
• File_Of_Key must be a function that will be called like File_Of_Key(key). It must return the filename of the file associated with the key, or nil if the key has no filename.
• posix_file_system must be the Posix_File_System instance to use.

Notes

Same note from the mtime rebuilder about file-less keys applies here.

See Also

• build.hashers.sha1.
• build.hashers.apenwarr.
• build.hashers.combined-clean.
• build.hashers.combined-dirty.