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.\" (C) Copyright 2019 Robin Krahl <robin.krahl@ireas.org>
.TH RUSTY-TAGS 1 2019-01-25
.SH NAME
rusty-tags \- creates ctags/etags for a cargo project
.SH SYNOPSIS
\fBrusty-tags\fR [\fIoptions\fR] \fItags_kind\fR
.SH DESCRIPTION
\fBrusty-tags\fR creates tags for source code navigation using ctags for a
\fBcargo\fR(1) project, all of its direct and indirect dependencies and the
Rust standard library.
It can be run anywhere inside a cargo project.
\fBrusty-tags\fR creates a rusty-tags.vi (if \fItags_kind\fR is \fBvi\fR) or
a rusty-tags.emacs file (if \fItags_kind\fR is \fBemacs\fR) beside the
Cargo.toml file.
Tags are also generated for every dependency.
If a dependency reexports parts of its own dependencies, then these reexported
parts are also contained in the tags file of the dependency.
.P
Tags for the standard library are created if the path to the Rust source is
supplied by defining the environment variable \fBRUST_SRC_PATH\fR.
.SH OPTIONS
.TP
\fB\-f\fR, \fB\-\-force\-recreate\fR
Forces the recreation of the tags of all dependencies and the Rust standard
library.
.TP
\fB\-h\fR, \fB\-\-help\fR
Prints help information.
.TP
\fB\-n\fR, \fB\-\-num-threads=\fInum\fR
Set the number of threads used for the tags creation (default: number of
available physical cpus).
.TP
\fB\-o\fR, \fB\-\-omit\-deps\fR
Do not generate tags for dependencies.
.TP
\fB\-O\fR, \fB\-\-output=\fIfilename\fR
Set the name of the output tags file (default: rusty-tags.vi if \fItags_kind\fR
is \fBvi\fR or rusty-tags.emacs if \fItags_kind\fR is \fBemacs\fR).
.TP
\fB\-q\fR, \fB\-\-quiet\fR
Do not output anything but errors.
.TP
\fB\-s\fR, \fB\-\-start-dir=\fIdir\fR
Set the start directory for the search of the Cargo.toml file (default: current
working directory).
.TP
\fB\-V\fR, \fB\-\-version\fR
Prints version information.
.TP
\fB\-v\fR, \fB\-\-verbose\fR
Enable verbose output about all operations.
.SH CONFIGURATION
.SS rusty-tags configuration
\fBrusty-tags\fR reads the configuration file ~/.rusty-tags/config.toml. It
supports these settings:
.TP
.B vi_tags
The file name used for vi tags (default: rusty-tags.vi).
.TP
.B emacs_tags
The file name used for emacs tags (default: rusty-tags.emacs).
.TP
.B ctags_exe
The name or path to the \fBctags\fR(1) executable (default: ctags,
exuberant-ctags, exctags, universal-ctags, uctags are tried in that order).
.TP
.B ctags_options
The options given to the \fBctags\fR(1) executable (default: none).
.SS vim configuration
To use the generated tag files with vim, add the following to your vimrc file:
autocmd BufRead *.rs :setlocal tags=./rusty-tags.vi;/
autocmd BufWritePost *.rs :silent! exec "!rusty-tags vi --quiet \
--start-dir=" . expand('%:p:h') . "&" | redraw!
.P
The first line ensures that vim will automatically search for a rusty-tags.vi
file upwards the directory hierarchy.
This setting is important if you want to jump to dependencies and the further
jump to their dependencies.
.P
The second line ensures that your project's tag file gets updated if a file is
written.
.P
If you have set the path to the Rust source code in the \fBRUST_SRC_PATH\fR
environment variable, use this setting instead:
autocmd BufRead *.rs :setlocal tags=./rusty-tags.vi;/,$RUST_SRC_PATH/rusty-tags.vi
.SH ENVIRONMENT
.TP
.B RUST_SRC_PATH
The path to the source code of the Rust standard library to generate tags for.
.SH FILES
.TP
.B ~/.rusty-tags/config.toml
The configuration file for \fBrusty-tags\fR (see the \fBConfiguration\fR section).
.SH SEE ALSO
\fBctags\fR(1)
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