COMP: Shorten Windows build root to stay under ITK path limit#128
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hjmjohnson merged 1 commit intoInsightSoftwareConsortium:mainfrom Apr 15, 2026
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Instead of unconditionally skipping ITK's path length checks, shorten the build directory path on Windows using a directory junction. The repo name is stripped of its "ITK" prefix and truncated to 12 characters (e.g. ITKFixedPointInverseDisplacementField → FixedPointIn), then a junction D:\<short> → D:\a\<full-repo-name> provides a short root for ITK clone, build, and CTest dashboard directories. This keeps ITK's 50-character path validation active as a safety check while ensuring long-named remote module repos can build on Windows CI. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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I like this solution. Have you tested it on any remote module other than FixedPointInverseDisplacementField?
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@dzenanz That was the only one that had a long enough name to cause the issue. This only affects CI dashboards where only 1 item is built at at ime so thare should be no errors. |
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We changed the name of MorphologicalContourInterpolation for this reason some time ago. |
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Also, I meant does this affect negatively other modules with short names, such as e.g. |
This was referenced Apr 15, 2026
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Shorten the build directory path on Windows using a directory junction instead of bypassing ITK's path length validation. The repo name is stripped of its "ITK" prefix and truncated to 12 characters, then a junction provides a short root for all build directories.
How it works
ITKFixedPointInverseDisplacementField→ stripITK→ truncate to 12 →FixedPointInD:\FixedPointIn→D:\a\ITKFixedPointInverseDisplacementFieldITK_BUILD_ROOTenv var in all subsequent steps (Download ITK, Build ITK, Configure CTest)ITK_BUILD_ROOTis just the real workspace parent (no junction needed)Path math:
D:\FixedPointIn\ITK-build= 26 chars (well under the 50-char limit).Why not ITK_SKIP_PATH_LENGTH_CHECKS?
The previous approach disabled ITK's path validation entirely. This approach keeps the safety check active — if a path is genuinely too long even after shortening, ITK will still catch it at configure time.