ctags

Generates an index (or tag) file of language objects found in source files for many popular programming languages.

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• Generate tags for a single file, and output them to a file named "tags" in the current directory, overwriting the file if it exists:

ctags {path/to/file}

• Generate tags for all files in the current directory, and output them to a specific file, overwriting the file if it exists:

ctags -f {filename} *

• Generate tags for all files in the current directory and all subdirectories:

ctags --recurse

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