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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - git-clang-format updates modified time of unchanged files"
href="https://bugs.llvm.org/show_bug.cgi?id=40860">40860</a>
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<th>Summary</th>
<td>git-clang-format updates modified time of unchanged files
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Formatter
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>arichardson.kde@gmail.com
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<th>CC</th>
<td>djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
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<pre>Whenever I run git-clang-format followed by ninja, it will recompile all
uncommited files even if git-clang-format did not modify any files.
It seems like git-clang-format will update the modifiation time even for
unchanged files. This is fine for .cpp files but if it touches a commonly used
header I then have to recompile effectively all of my project (this can be
quite significant for commonly used LLVM headers).
It might be possible to write the changed file to a memory buffer, diff that
with the on-disk file and only update that file if any changes have been
detected.</pre>
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