SYNOPSIS
use Arch::Backend qw(arch_backend is_baz has_file_diffs_cmd);
my $exe = arch_backend();
print "Not in tree, try '$exe init-tree'\n";
my $version = Arch::Backend::arch_backend_version;
print "Using baz $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_tla, is_baz, 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, has_cache_feature, get_cache_config, has_commit_version_arg, has_commit_files_separator, has_revlib_patch_set_dir.
- arch_backend [exe]
-
Return or set the arch backend executable, like ``/opt/bin/tla'' or ``baz-1.3''.
By default, the arch backend executable is taken from environment variable $ARCH_BACKEND (or $TLA, or $BAZ). If no environment variable is set, then ``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''.
- has_cache_feature
- Return true if the arch backend supports Arch Cache feature. This is true for baz.
- get_cache_config
- Return hash with the following keys: dir - directory of the local cache (or undef if not applicable).
- has_commit_version_arg
- Return true if the arch backend's ``commit'' command supports version argument. baz-1.4 removed this functionality.
- has_commit_files_separator
- Return true if the arch backend's ``commit'' command requires ``--'' argument to separate files. baz-1.4 removed this separator.
- has_revlib_patch_set_dir
- Return true if the arch backend's creates ,,patch-set subdirectory in revision library. baz-1.4 removed this functionality.