Lossless bi-directional formatting of program source code

A computer program product comprising:

• a computer readable storage medium readable by one or more processors and storing instructions for execution by the one or more processors for performing a method comprising:
• obtaining, by the one or more processors of a host, from a client, via a communication connection over a network, a request to commit a modified version of program source code to a repository administered by the host;
• identifying, by the one or more processors, formatting in the modified version implemented by an editor executing on the client;
• removing, by the one or more processors, the identified formatting from the modified version;
• transforming, by the one or more processors, the modified version into a first storage structure comprising content of the modified version without the identified formatting, wherein the first storage structure comprises a canonical internal representation, wherein the transforming comprises:
• identifying, by the one or more processors, a programming language comprising the modified version;
• and
• based on identifying the language, applying, by the one or more processors, a language-specific tool to build the canonical internal representations;
• identifying, by the one or more processors, one or more differences between the first storage structure representing the modified version and a second storage structure, wherein the second storage structure comprises an unmodified version of the program source code stored in the repository;
• and
• storing, by the one or more processors, the one or more differences in the repository.

A system comprising:

• a memory;
• one or more processors in communication with the memory;
• and
• program instructions executable by the one or more processors via the memory to perform a method, the method comprising:
• obtaining, by the one or more processors of a host, from a client, via a communication connection over a network, a request to commit a modified version of program source code to a repository administered by the host;
• identifying, by the one or more processors, formatting in the modified version implemented by an editor executing on the client;
• removing, by the one or more processors, the identified formatting from the modified version;
• transforming, by the one or more processors, the modified version into a first storage structure comprising content of the modified version without the identified formatting, wherein the first storage structure comprises a canonical internal representation, wherein the transforming comprises:
• identifying, by the one or more processors, a programming language comprising the modified version;
• and
• based on identifying the language, applying, by the one or more processors, a language-specific tool to build the canonical internal representations;
• identifying, by the one or more processors, one or more differences between the first storage structure representing the modified version and a second storage structure, wherein the second storage structure comprises an unmodified version of the program source code stored in the repository;
• and
• storing, by the one or more processors, the one or more differences in the repository.