stow 2.3.0 added external runtime dependencies on Hash::Merge and
Clone::Choose. Historically stow hasn't had runtime dependencies other
than Perl itself, which is a useful property if you're managing the
installation of Perl using stow; the bootstrapping instructions in
stow's manual would need updating to describe how to install these two
modules (and any dependencies they have now or in the future) as well.
However, Hash::Merge is much more general than stow actually needs, so
replace the merge() call with a few lines of equivalent code -- this
avoids the external dependencies, and is clearer than the merge()
call.
Many thanks to Adam Sampson for this patch:
https://lists.gnu.org/archive/html/bug-stow/2019-06/msg00001.html
.stowrc can be obtained from $HOME and/or the current working
directory; however only the $HOME case was tested before, because
during tests Stow was being run from $HOME.
So switch $TEST_DIR to an absolute path, create a new run_from/
subdirectory, and chdir to that before invoking any Stow code. This
allows us to test the behaviour of .stowrc in $HOME and run_from/
separately.
Add a new expand_tilde() function that performs tilde expansion of
strings, and corresponding unit tests:
* A ~ at the beginning of a path is expanded to the user's home
directory.
* Literal '~' can be provided with '\~'
Combine this with expand_environment() in a new expand_filepath()
function which applies all (both) required expansion functions to a
string, and use that in get_config_file_options() to expand .stowrc
options.
Add more tests to check that tilde expanded in correct places, i.e.:
* expanded for --target and --dir
* not expanded for --ignore, --defer, or --override
Update documentation on stowrc files according to this functionality
change.
Fixes#14: https://github.com/aspiers/stow/issues/14
Expand environment variables used in stowrc, as requested in
https://savannah.gnu.org/bugs/?41826
This is achieved by creating a new function expand_environment() that
replaces any substring of the form '$VAR' or '${VAR}' with contents of
environment variable $VAR. Literal '$' can be given by '\$'.
N.B. The function is only applied to the --target and --dir options,
and only for options specified in .stowrc; cli options are left
untouched.
Undefined variables are expanded to the empty string, as they would be
in normal shell parameter expansion.
Unit tests added accordingly:
- Test expand_environment():
* Expand $HOME
* Expand ${HOME}
* Expand ${WITH SPACE}
* Expand '\$HOME'. Expected is '$HOME'
* Expand ${UNDEFINED}. Expected is ''.
- Test that it's applied to the correct options.
- Test that CLI options are not expanded.
Why:
* Want to add feature to stowrc parsing.
* Missing regression test for conflicting cli and stowrc options.
This change addresses the need by:
* Add missing regression tests to rc_options.t
* Two types of tests for the two types of options possible.
* For scalar options such as --target, cli arguments should overwrite
stowrc arguments.
* For options that result in a list, such as --ignore, the arguments
from cli and stowrc files should be merged.
Why:
* Planning on developing a new feature for parsing of stowrc files.
* Need a test harness that performs initialization and clean up
* Initialization: Create directory structure that allows creation of
stowrc files without worrying about squashing existing files.
* Clean up: Remove all files created during testing.
This change addresses the need by:
* Add intialization and cleanup harness in t/rc_options.t
* Define the location to write stowrc files to in $RC_FILE
* Ensures that location $RC_FILE does not already exist.
* Calls the init_test_dirs to bootstrap directory tree.
* After all tests are run, removes $RC_FILE and the testing
directory tree.
* Add basic test of stowrc parsing to t/rc_options.t
* Provides a template of how to create and test a stowrc file.
* Newly created t/rc_options.t file added to MANIFEST
