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Add 'canonicalize-path' option to link

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Dotbot had a hardcoded behaviour that the BASEDIR was always passed to
os.path.realpath which "returns the canonical path of the specified
filename, eliminating any symbolic links encountered in the path".

This might not always be desirable so this commit makes it configurable.

The use case where `canonicalize-path` comes in handy is the following:
You want to provide dotfiles in the Filesystem Hierarchy Standard under
`/usr/local/share/ypid_dotfiles/`. Now you want to provide
`.config/dotfiles` as a default in `/etc/skel`. When you now
pre-configure `/etc/skel` by running dotbot in it set has HOME, dotfiles
will refer to `/usr/local/share/ypid_dotfiles/` and not
`/etc/skel/.config/dotfiles` which does not look nice.

This is related to but not the same as the `relative` parameter used
with link commands.
This commit is contained in:
Robin Schneider 2018-05-21 19:10:17 +02:00
parent e38e021ab3
commit 138fdbc8d7
No known key found for this signature in database
GPG key ID: A81E8006DC95EFE6
4 changed files with 22 additions and 14 deletions
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1
README.md
View file

@ -176,6 +176,7 @@ Available extended configuration parameters:
| `relink` | Removes the old target if it's a symlink (default:false) | | `relink` | Removes the old target if it's a symlink (default:false) |
| `force` | Force removes the old target, file or folder, and forces a new link (default:false) | | `force` | Force removes the old target, file or folder, and forces a new link (default:false) |
| `relative` | Use a relative path to the source when creating the symlink (default:false, absolute links) | | `relative` | Use a relative path to the source when creating the symlink (default:false, absolute links) |
| `canonicalize-path` | Resolve any symbolic links encountered in the source to symlink to the canonical path (default:true, real paths) |
| `glob` | Treat a `*` character as a wildcard, and perform link operations on all of those matches (default:false) | | `glob` | Treat a `*` character as a wildcard, and perform link operations on all of those matches (default:false) |
| `if` | Execute this in your `$SHELL` and only link if it is successful. | | `if` | Execute this in your `$SHELL` and only link if it is successful. |
| `ignore-missing` | Do not fail if the source is missing and create the link anyway (default:false) | | `ignore-missing` | Do not fail if the source is missing and create the link anyway (default:false) |

8
dotbot/context.py
View file

@ -1,4 +1,5 @@
import copy import copy
import os
class Context(object): class Context(object):
''' '''
@ -13,8 +14,11 @@ class Context(object):
def set_base_directory(self, base_directory): def set_base_directory(self, base_directory):
self._base_directory = base_directory self._base_directory = base_directory
def base_directory(self): def base_directory(self, canonical_path=True):
return self._base_directory base_directory = self._base_directory
if canonical_path:
base_directory = os.path.realpath(base_directory)
return base_directory
def set_defaults(self, defaults): def set_defaults(self, defaults):
self._defaults = defaults self._defaults = defaults

4
dotbot/dispatcher.py
View file

@ -10,8 +10,8 @@ class Dispatcher(object):
self._load_plugins() self._load_plugins()
def _setup_context(self, base_directory): def _setup_context(self, base_directory):
path = os.path.abspath(os.path.realpath( path = os.path.abspath(
os.path.expanduser(base_directory))) os.path.expanduser(base_directory))
if not os.path.exists(path): if not os.path.exists(path):
raise DispatchError('Nonexistent base directory') raise DispatchError('Nonexistent base directory')
self._context = Context(path) self._context = Context(path)

23
dotbot/plugins/link.py
View file

@ -26,6 +26,7 @@ class Link(dotbot.Plugin):
for destination, source in links.items(): for destination, source in links.items():
destination = os.path.expandvars(destination) destination = os.path.expandvars(destination)
relative = defaults.get('relative', False) relative = defaults.get('relative', False)
canonical_path = defaults.get('canonicalize-path', True)
force = defaults.get('force', False) force = defaults.get('force', False)
relink = defaults.get('relink', False) relink = defaults.get('relink', False)
create = defaults.get('create', False) create = defaults.get('create', False)
@ -36,6 +37,7 @@ class Link(dotbot.Plugin):
# extended config # extended config
test = source.get('if', test) test = source.get('if', test)
relative = source.get('relative', relative) relative = source.get('relative', relative)
canonical_path = source.get('canonicalize-path', canonical_path)
force = source.get('force', force) force = source.get('force', force)
relink = source.get('relink', relink) relink = source.get('relink', relink)
create = source.get('create', create) create = source.get('create', create)
@ -68,8 +70,8 @@ class Link(dotbot.Plugin):
if create: if create:
success &= self._create(destination) success &= self._create(destination)
if force or relink: if force or relink:
success &= self._delete(path, destination, relative, force) success &= self._delete(path, destination, relative, canonical_path, force)
success &= self._link(path, destination, relative, ignore_missing) success &= self._link(path, destination, relative, canonical_path, ignore_missing)
else: else:
self._log.lowinfo("Globs from '" + path + "': " + str(glob_results)) self._log.lowinfo("Globs from '" + path + "': " + str(glob_results))
glob_base = path[:glob_star_loc] glob_base = path[:glob_star_loc]
@ -79,8 +81,8 @@ class Link(dotbot.Plugin):
if create: if create:
success &= self._create(glob_link_destination) success &= self._create(glob_link_destination)
if force or relink: if force or relink:
success &= self._delete(glob_full_item, glob_link_destination, relative, force) success &= self._delete(glob_full_item, glob_link_destination, relative, canonical_path, force)
success &= self._link(glob_full_item, glob_link_destination, relative, ignore_missing) success &= self._link(glob_full_item, glob_link_destination, relative, canonical_path, ignore_missing)
else: else:
if create: if create:
success &= self._create(destination) success &= self._create(destination)
@ -94,8 +96,8 @@ class Link(dotbot.Plugin):
(destination, path)) (destination, path))
continue continue
if force or relink: if force or relink:
success &= self._delete(path, destination, relative, force) success &= self._delete(path, destination, relative, canonical_path, force)
success &= self._link(path, destination, relative, ignore_missing) success &= self._link(path, destination, relative, canonical_path, ignore_missing)
if success: if success:
self._log.info('All links have been set up') self._log.info('All links have been set up')
else: else:
@ -159,9 +161,9 @@ class Link(dotbot.Plugin):
self._log.lowinfo('Creating directory %s' % parent) self._log.lowinfo('Creating directory %s' % parent)
return success return success
def _delete(self, source, path, relative, force): def _delete(self, source, path, relative, canonical_path, force):
success = True success = True
source = os.path.join(self._context.base_directory(), source) source = os.path.join(self._context.base_directory(canonical_path=canonical_path), source)
fullpath = os.path.expanduser(path) fullpath = os.path.expanduser(path)
if relative: if relative:
source = self._relative_path(source, fullpath) source = self._relative_path(source, fullpath)
@ -195,7 +197,7 @@ class Link(dotbot.Plugin):
destination_dir = os.path.dirname(destination) destination_dir = os.path.dirname(destination)
return os.path.relpath(source, destination_dir) return os.path.relpath(source, destination_dir)
def _link(self, source, link_name, relative, ignore_missing): def _link(self, source, link_name, relative, canonical_path, ignore_missing):
''' '''
Links link_name to source. Links link_name to source.
@ -203,7 +205,8 @@ class Link(dotbot.Plugin):
''' '''
success = False success = False
destination = os.path.expanduser(link_name) destination = os.path.expanduser(link_name)
absolute_source = os.path.join(self._context.base_directory(), source) base_directory = self._context.base_directory(canonical_path=canonical_path)
absolute_source = os.path.join(base_directory, source)
if relative: if relative:
source = self._relative_path(absolute_source, destination) source = self._relative_path(absolute_source, destination)
else: else: