Differential package manufacturing method and device

Abstract

The invention discloses a differential package manufacturing method and device. The differential package manufacturing method comprises the following steps: determining target files in a new version file package and source files in an old version file package; respectively determining unique identifiers of the target files and the source files before decompression; decompressing the target files and the source files with different unique identifiers; determining whether the decompressed target files and the decompressed source files are the same; and if so, eliminating the target files the same as the source files, and manufacturing the target files different from the source files into a differential package. By adopting the differential package manufacturing method and device disclosed by the invention, files requiring no processing can be eliminated, thereby reducing the size of an upgrading package and accelerating the upgrading speed.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a method and device for making a differential packet. Background technique [0002] figure 1 It is a schematic diagram of OTA upgrade types. As shown in the figure, there are two types of OTA (Over-the-Air Technology, over-the-air technology) upgrades, and each type has corresponding uses and advantages. The two types are: IncrementOTA (incremental / differential) and FullOTA (whole package). [0003] The biggest difference between the two types of OTA lies in the "starting point" for the creation of two different upgrade packages. The old (original) package is not needed when creating the whole package, and the base (basic) package can be directly used for upgrading. Usually, the size of the whole package is closer to the image of the entire firmware. There are no specific restrictions on the differential packet, which can be as large as the entire packet, or only a few...

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Problems solved by technology

[0004] However, the inventors of the present application found that the current system differential package production scheme in the prior art mainly focuses on how to quickly complete the package production, which is reflected in the comparison of differences, that is, the comparison of the differences between the upgrade file and the source file , however, in the process of making a differential package, since the source file and the target file are essentially compressed files made using a compression algorithm, various current compression algorithms will inevitably introduce some unnecessary redundant information, this redundancy Information does not belong to the actual upgrade content, such as file modification time changes, different compilation time points and other packaging information, etc. Such information will be added to the differential package when compressed with a compression tool. In actual use, the real software upgrade The code part may not change, that is to say, the differential upgrade package produced by the existing technology usually makes such redundant information into the package, which increases the number of files in the differential package and further affects the upgrade process. time

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