# tags

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Module

tags

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Module Summary

Generate Emacs TAGS file from Erlang source files

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Description

A TAGS file is used by Emacs to find function and variable definitions in any source file in large projects. This module can generate a TAGS file from Erlang source files. It recognises functions, records, and macro definitions.

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Exports

####
file(File) -> ok | error

####
file(File, Options) -> ok | error

### Types

File = file:filename()
Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Create a TAGS file for the file File.

####
files(FileList) -> ok | error

####
files(FileList, Options) -> ok | error

### Types

FileList = [file:filename()]
Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Create a TAGS file for the files in the list FileList.

####
dir(Dir) -> ok | error

####
dir(Dir, Options) -> ok | error

### Types

Dir = file:filename()
Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Create a TAGS file for all files in directory Dir.

####
dirs(DirList) -> ok | error

####
dirs(DirList, Options) -> ok | error

### Types

DirList = [file:filename()]
Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Create a TAGS file for all files in any directory in DirList.

####
subdir(Dir) -> ok | error

####
subdir(Dir, Options) -> ok | error

### Types

Dir = file:filename()
Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Descend recursively down the directory Dir and create a TAGS file based on all files found.

####
subdirs(DirList) -> ok | error

####
subdirs(DirList, Options) -> ok | error

### Types

DirList = [file:filename()]
Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Descend recursively down all the directories in DirList and create a TAGS file based on all files found.

####
root() -> ok | error

####
root(Options) -> ok | error

### Types

Options = [option()]
option() =
{outfile, NameOfTAGSFile :: file:filename()} |
{outdir, NameOfDirectory :: file:filename()}

Create a TAGS file covering all files in the Erlang distribution.

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OPTIONS

The functions above have an optional argument, Options. It is a list which can contain the following elements:

- {outfile, NameOfTAGSFile} Create a TAGS file named NameOfTAGSFile.
- {outdir, NameOfDirectory} Create a file named TAGS in the directory NameOfDirectory.

The default behaviour is to create a file named TAGS in the current directory.

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Examples

- tags:root([{outfile, "root.TAGS"}]).

  This command will create a file named root.TAGS in the current directory. The file will contain references to all Erlang source files in the Erlang distribution.

- tags:files(["foo.erl", "bar.erl", "baz.erl"], [{outdir, "../projectdir"}]).

  Here we create file named TAGS placed it in the directory ../projectdir. The file contains information about the functions, records, and macro definitions of the three files.

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SEE ALSO

- Richard M. Stallman. GNU Emacs Manual, chapter "Editing Programs", section "Tag Tables". Free Software Foundation, 1995.
- Anders Lindgren. The Erlang editing mode for Emacs. Ericsson, 1998.