NAME

Open::This - Try to Do the Right Thing when opening files

VERSION

version 0.000036

DESCRIPTION

This module powers the ot command line script, which tries to do the right thing when opening a file. Imagine your $ENV{EDITOR} is set to vim. (This should also work for emacs and nano.) The following examples demonstrate how your input is translated when launching your editor.

ot Foo::Bar # vim lib/Foo/Bar.pm
ot Foo::Bar # vim t/lib/Foo/Bar.pm

Imagine this module has a sub do_something at line 55.

ot "Foo::Bar::do_something()" # vim +55 lib/Foo/Bar.pm

Or, when copy/pasting from a stack trace. (Note that you do not need quotes in this case.)

ot Foo::Bar line 36 # vim +36 lib/Foo/Bar.pm

Copy/pasting a git-grep result.

ot lib/Foo/Bar.pm:99 # vim +99 Foo/Bar.pm

Copy/pasting a partial GitHub URL.

ot lib/Foo/Bar.pm#L100 # vim +100 Foo/Bar.pm

Copy/pasting a full GitHub URL.

ot https://github.com/oalders/open-this/blob/master/lib/Open/This.pm#L17-L21
# vim +17 lib/Open/This.pm

GitLab, Codeberg, Bitbucket and SourceHut file URLs are also understood.

Open a local file on the GitHub web site in your web browser. From within a checked out copy of https://github.com/oalders/open-this

ot -b Foo::Bar

URLs are built in the style of GitHub, GitLab, Codeberg, Bitbucket or SourceHut, depending on the host of your remote. Other hosts get GitHub-style URLs.

Open a local file at the correct line on the GitHub web site in your web browser. From within a checked out copy of https://github.com/oalders/open-this:

ot -b Open::This line 50
# https://github.com/oalders/open-this/blob/master/lib/Open/This.pm#L50

SUPPORTED EDITORS

This code has been well tested with vim. It should also work with nvim, emacs, pico, nano and kate. Patches for other editors are very welcome.

FUNCTIONS

parse_text

Given a scalar value or an array of scalars, this function will try to extract useful information from it. Returns a hashref on success. Returns undef on failure. file_name is the only hash key which is guaranteed to be in the hash.

use Open::This qw( parse_text );
my $parsed = parse_text('t/lib/Foo/Bar.pm:32');

# $parsed = { file_name => 't/lib/Foo/Bar.pm', line_number => 32, }

my $with_sub_name = parse_text( 'Foo::Bar::do_something()' );

# $with_sub_name = {
#     file_name     => 't/lib/Foo/Bar.pm',
#     line_number   => 3,
#     original_text => 't/lib/Foo/Bar.pm:32',
#     sub_name      => 'do_something',
# };

to_editor_args

Given a scalar value, this calls parse_text() and returns an array of values which can be passed at the command line to an editor.

my @args = to_editor_args('Foo::Bar::do_something()');
# @args = ( '+3', 't/lib/Foo/Bar.pm' );

editor_args_from_parsed_text

If you have a hashref from the parse_text function, you can get editor args via this function. (The faster way is just to call to_editor_args directly.)

my @args
    = editor_args_from_parsed_text( parse_text('t/lib/Foo/Bar.pm:32') );

maybe_get_url_from_parsed_text

Tries to return an URL to a Git repository for a checked out file. The repository, remote and branch are those of the checkout the file lives in, which need not be the one you are in. The file must be committed on the current branch; otherwise, or if the file is outside any checkout, undef is returned. The URL will be built using the first remote listed in $ENV{OPEN_THIS_REMOTES} (comma-separated) that exists, falling back to origin, the name of the checkout's current branch and the file's path from the root of the checkout. A line number will be attached if it can be parsed from the text. GitHub, GitLab, Codeberg, Bitbucket and SourceHut URL layouts are supported; other hosts get GitHub-style URLs. It assumes you're working on a branch which has already been pushed to your remote.

my $url = maybe_get_url_from_parsed_text( parse_text('t/lib/Foo/Bar.pm:32'));
# $url might be something like: https://github.com/oalders/open-this/blob/master/lib/Open/This.pm#L32

ENVIRONMENT VARIABLES

By default, ot will search your lib and t/lib directories for local files. You can override this via the $ENV{OPEN_THIS_LIBS} variable. It accepts a comma-separated list of libs.

VIM INTEGRATION

If you're a vim user, you can use the following code to your .vimrc to integrate ot directly with your editor.

" Thanks to D. Ben Knoble for getting histadd() to work:
" https://vi.stackexchange.com/questions/34818/how-to-use-histadd-with-a-custom-function/34819#34819
nnoremap <leader>ot :call OT(input("ot: ", "", "file"))<cr>

" trim() requires vim 8
" https://github.com/vim/vim/commit/295ac5ab5e840af6051bed5ec9d9acc3c73445de
function! OT(fname)
    let res = system("ot --editor vim --print " . shellescape(trim(a:fname)))
    if v:shell_error
        echo "\n" . res
    else
        execute "e " res
    endif
    call histadd(':', printf('call OT("%s")', escape(a:fname, '"\')))
endfunction

With the above code, you can enter <leader>ot and then enter your ot args directly in vim. If the file is found, it will be opened in a buffer, hopefully at the appropriate line and column number. An up to date copy of this command should generally be available in my dotfiles repo as well: https://github.com/oalders/dot-files/blob/main/vim/vimrc.

AUTHOR

Olaf Alders olaf@wundercounter.com

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Olaf Alders.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.