Python program to compare two Informatica Powercenter XMLs and show differences.
- Powercenter exports Workflow and Mapping in XML format.
- Minor Changes in business logic (adding a new column) changes the XML format at multiple sections.
- Comparing current version and previous version is difficult at times since order of tags differ.
- Developers find it difficult to compare and validate if only intended changes are present in latest case.
- Command line invocating with summary output which can be integrated with CI/CD pipeline to log exact changes.
This utility helps to idenfity exact differences easily by sorting xml tags and uses Python's difflib to match sections of text.
python src/XMLDiffer.py -m data/V1.xml data/V2.xml -c > v1_v2_difference.html
Compares V1.xml and V2.xml and generates a HTML page with side by side comparison
usage: XMLDiffer.py [-h] [-m] [-u] [-n] [-c] [-l L] [-s S] leftfile rightfile
Python Script to compare two PowerCenter XML Files and display differences.
positional arguments:
leftfile Path to Left File
rightfile Path to Right File
optional arguments:
-h, --help show this help message and exit
-m Produce HTML page containing side-by-side comparison with change highlights
(can be used along with -c and -l)
-u Produce a unified format.
Show clusters of changes in an inline format
-n Produce a ndiff Format.
Show every line and highlights interline changes
-c Produce a context format diff.
Show clusters of changes in a before/after format
-l L Set number of context lines. Applicable for Unified, HTML and Context diff. Defaults to 3
-s S Generates a output file named S with summary of differences
Generates HTML output if no optional arguments are passed
Genarate a summary of insertions, addition, deletion in JSON format.
python src/XMLDiffer.py -m data/V1.xml data/V2.xml -s output/summary.json > v1_v2_difference.html
Content of output/summary.json
{
"leftfile_name": "data/V1.xml",
"rightfile_name": "data/V2.xml",
"line_count_leftfile": 234,
"line_count_rightfile": 220,
"common_lines": 220,
"deletions_in_leftfile": 0,
"additons_in_rightfile": 0
}
Unified diffs are compact way of showing just the lines changes plus a few lines of context. The changes are shown in an inline style (instead of separate before/after blocks).
The number of context lines is set by n which defaults to three.
python src/XMLDiffer.py -u data/V1.XML data/V2.XML -l 2 > output/unified.txt
Output is generated in instyle format
Compare files and return output in delta type difference.
python src/XMLDiffer.py -n data/V1.XML data/V2.XML > output/ndiff.txt
Compare files and return output in context diff format.
python src/XMLDiffer.py -c data/V1.XML data/V2.XML > output/cluster.txt
