![]() This CL attempts to restore the clarity of the original specification at https://golang.org/s/generatedcode that the line may appear anywhere. It is preferable (for human readability), and most common for it to be early in the file, but that is merely a convention, not a strict well-specified requirement. Document it as so. Background Issue #13560 was a proposal define a standard for marking files as generated, one that is suitable to be recognized both by humans and machine tools. It was accepted, and the final specification was documented at https://golang.org/s/generatedcode. Its text, copied exactly: Generated files are marked by a line of text that matches the regular expression, in Go syntax: ^// Code generated .* DO NOT EDIT\.$ The .* means the tool can put whatever folderol it wants in there, but the comment must be a single line and must start with Code generated and end with DO NOT EDIT., with a period. The text may appear anywhere in the file. The https://golang.org/s/generatedcode link points to a comment in a very large GitHub issue. That makes it harder to find. Issue #25433 was opened about moving that information somewhere else. It was resolved via CL 118756, which added text to cmd/go documentation at https://golang.org/cmd/go/#hdr-Generate_Go_files_by_processing_source: To convey to humans and machine tools that code is generated, generated source should have a line early in the file that matches the following regular expression (in Go syntax): ^// Code generated .* DO NOT EDIT\.$ The CL description noted that "This change merely moves that information to a more visible place." The intention was to preserve the specification unmodified. The original specification was very clear that "The text may appear anywhere in the file." The new text in cmd/go documentation wasn't very clear. "A line early in the file" is not a precise enough criteria to be recognized by a machine tool, because there isn't a precise definition of what lines are "early in the file". Updates #13560 Updates #25433 Updates #28089 Change-Id: I4e374163b16c3f972f9591ec2647fd3d5a2dd5ae Reviewed-on: https://go-review.googlesource.com/c/158817 Reviewed-by: Rob Pike <r@golang.org> |
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