Fixes#80.
Disable by default the symlinks resolution, making a symlink and its
target 2 different entries in the database. Adds the
_ZO_RESOLVE_SYMLINKS env variable to re-enable it.
Example:
/tmp/foo-target is a directory
/tmp/foo symlinks to /tmp/foo-target
With _ZO_RESOLVE_SYMLINKS=1, `z add /tmp/foo` adds `/tmp/foo-target` in the database.
With _ZO_RESOLVE_SYMLINKS=0 or unset, `z add /tmp/foo` adds `/tmp/foo` in the database.
_ZO_EXCLUDE_DIRS is a list of paths (separated by colons, `:`, on
Unix-based systems, and semicolons, `;`, on Windows) that should be
excluded from the database. Example:
_ZO_EXCLUDE_DIRS="$HOME:$HOME/something/super/secret:$HOME/caused/by/background/cds"
* Migrate errors from failure to anyhow
* Migrate argument parsing from clap to structopt
* Empty z command now goes to $HOME
* DB updates are now atomic and isolated
Ajeet D'Souza
Anthony Ruhier
Stavros Korokithakis
Cole Helbling