Customer relationship management system and method

1. A computer system comprising a processor and memory, the system comprising a computer program stored in fixed storage of the computer system that when loaded into the memory of the computer system, performs an upgrade method for an open source software application, the method comprising: receiving an upgrade package to upgrade an existing open source software application;

identifying, for each file in the upgrade package, if the file does not match a prior version of the file in order to indicate a file in the existing open source software application that has been customized;

automatically upgrading the files in the upgrade package that are not identified as being customized; and

selectively, based on one of user instructions and default logic, upgrading the files identified as being customized so that the customizations from the existing open source software application are not lost during the upgrade process.

2. The system of claim 1 , wherein identifying the customized file further comprises computing a checksum for each file in the upgrade package and comparing the computed checksum against known checksum values for the file from a previously installed version of the software application.

3. The system of claim 2 , wherein computing the checksum further comprises computing an MD5 checksum.

4. The system of claim 2 , wherein computing the checksum further comprises computing an MD5 checksum that is independent of line feeds, source code control system tags, and/or changes to whitespace in the source code.

5. A computer program product for upgrading an open source software application, the computer program product comprising:

a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:

computer readable program code for receiving an upgrade package to upgrade an existing open source software application;

computer readable program code for identifying, for each file in the upgrade package, if the file does not match a prior version of the file in order to indicate a file in the existing open source software application that has been customized;

computer readable program code for automatically upgrading the files in the upgrade package that are not identified as being customized; and

computer readable program code for selectively, based on one of user instructions and default logic, upgrading the files identified as being customized so that the customizations from the existing open source software application are not lost during the upgrade process.

6. The computer program product of claim 5 , wherein the computer readable program code for identifying the customized file further comprises computer readable program code for computing a checksum for each file in the upgrade package and comparing the computed checksum against known checksum values for the file from a previously installed version of the software application.

7. The computer program product of claim 6 , wherein the computer readable program code for computing the checksum further comprises computer readable program code for computing an MD5 checksum.

8. The computer program product of claim 6 , wherein the computer readable program code for computing the checksum further comprises computer readable program code for computing an MD5 checksum that is independent of line feeds, source code control system tags, and/or changes to whitespace in the source code.