NAME
Arch::Backend - Arch backend feature specific functions
SYNOPSIS
use Arch::Backend qw(arch_backend is_baz has_file_diffs_cmd);
my $exe = arch_backend(); # or $Arch::Backend::EXE
print "No tree, try '$exe init-tree'\n";
print "Using baz ", Arch::Backend::arch_backend_version,
" as a backend\n" if is_baz();
my $cmd = has_file_diffs_cmd()
? "file-diffs"
: "file-diff";
Arch::Util::run_tla($cmd, $filename);DESCRIPTION
A set of helper functions suitable for GNU Arch related projects in Perl.
Higher (object oriented) levels of Arch/Perl library make use of these helper functions to query certain aspects (like incompatible features) of the actual arch backend used.
FUNCTIONS
The following functions are available:
arch_backend, arch_backend_name, arch_backend_version, is_baz, is_tla, has_archive_setup_cmd, has_file_diffs_cmd, has_register_archive_name_arg, has_tree_version_dir_opt, has_tree_id_cmd, has_set_tree_version_cmd.
- arch_backend [exe]
-
Return or set the arch backend executable, like "/opt/bin/tla" or "baz-1.3". By default, "tla" is used.
- arch_backend_name
-
Return the brand name of the arch backend, "tla" or "baz".
- arch_backend_version
-
Return the arch backend version, like "1.3.1".
- is_tla
-
Return true if arch_backend_name is "tla".
- is_baz
-
Return true if arch_backend_name is "baz".
- has_archive_setup_cmd
-
Return true if the arch backend has "archive-setup" command. baz removed this command.
- has_file_diffs_cmd
-
Return true if the arch backend has "file-diffs" command. It was renamed to "file-diff" in tla-1.3.
- has_register_archive_name_arg
-
Return true if the arch backend's "register-archive" command supports two positional arguments, one of which is archive name. baz-1.3 removed such syntax; the previous baz versions supported this syntax, but it was useless, since the archive was accessed anyway.
- has_tree_version_dir_opt
-
Return true if the arch backend's "tree-version" command supports "-d" options. This is true for baz.
- has_tree_id_cmd
-
Return true if the arch backend has "tree-id" command. This is true for baz.
- has_set_tree_version_cmd
-
Return true if the arch backend has "set-tree-version" command. baz removed this command and merged it into "tree-version".
BUGS
This module uses heuristics and does not (intend to) provide the perfect information. Requires constant updating.
AUTHORS
Mikhael Goikhman (migo@homemail.com--Perl-GPL/arch-perl--devel).