How to merge source code files Leave feedback

GroupDocs.Comparison allows you to merge source code files by using the ComparisonActionproperty:

• ComparisonAction.Accept accepts the found changes and adds them to the file without highlighting
• ComparisonAction.Reject rejects the found changes and removes them from the output file

1. Instantiate the Comparer object. Specify the source document path or stream.
2. Call the add method. Specify the target document path or stream.
3. Call the compare method.
4. Call the get_changes) method to get the list of changes.
5. Set the comparison_action property of the appropriate change object to either ComparisonAction.ACCEPT or ComparisonAction.REJECT.
6. Call the apply_changes method. Pass the collection of changes to apply.

You need to compare and merge several versions of source code files and selectively accept or discard changes made by different authors.

Before comparison:

The differences show that two methods are in the source.cs file: AddNumbers and Sum.

If you do not use the comparison_action property, all changes are automatically applied to the output file, and these methods are removed. If you need to control the merging process, the comparison_action property helps you do that.

import groupdocs.comparison as gc
from groupdocs.comparison.result import ComparisonAction
from groupdocs.comparison.options import ApplyChangeOptions

with gc.Comparer("source.docx") as comparer:
    comparer.add("target.docx")
    comparer.compare("result.docx")

    changes = comparer.get_changes()

    # Accept first 10 changes
    for i in range(min(10, len(changes))):
        changes[i].comparison_action = ComparisonAction.ACCEPT

    # Reject the rest
    for i in range(10, len(changes)):
        changes[i].comparison_action = ComparisonAction.REJECT

    options = ApplyChangeOptions()
    options.changes = changes
    with open("result.docx", "wb") as result_file:
        comparer.apply_changes(result_file, options)

As a result, you get a merged source code file where:

• Deleted elements are marked in red
• Added elements are marked in blue
• Modified elements are marked in green

Also, you receive an HTML file that highlights all the changed places in the code.

Result source code file	Result HTML file

As you can see from the resulting files, only one of the two methods was removed.