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Configuration file sharing
==========================
[](https://github.com/egor-tensin/config-links/actions/workflows/test.yml)
[](https://github.com/egor-tensin/config-links/actions/workflows/debian.yml)
[](https://github.com/egor-tensin/config-links/actions/workflows/ppa.yml)
* Store your files in a repository.
* Checkout it on any machine.
* Create and maintain symlinks to these files easily.
How it works
------------
Actual files are stored in directories with names matching the `%VAR_NAME%`
pattern.
The part between the percent signs is the name of an environment variable.
Every file in such directory gets a symlink in the directory pointed to by the
environment variable.
Directory hierarchies are preserved.
A database of symlinks is maintained in case a shared file is deleted (the
corresponding symlink is then deleted too).
The default database file name is "links.bin", maintained in the top-level
directory with shared files.
For a complete usage example, see below.
Usage
-----
Symlinks are created & maintained by `links-update`.
```
usage: links-update [-h|--help] [-d|--database PATH] [-s|--shared-dir DIR] [-n|--dry-run]
```
To remove all symlinks, use `links-remove`.
```
usage: links-remove [-h|--help] [-d|--database PATH] [-s|--shared-dir DIR] [-n|--dry-run]
```
In this example, symlinks to files in "../src" must appear in "/test/dest".
```
> tree /test/dest/
/test/dest/
0 directories, 0 files
> tree ../src/
../src/
└── %DEST%
├── a
│ └── b
│ └── c
│ └── test.txt
└── foo
└── bar
└── baz
6 directories, 2 files
> echo "$DEST"
/test/dest
> ./links-update --shared-dir ../src/
...
> tree /test/dest/
/test/dest/
├── a
│ └── b
│ └── c
│ └── test.txt -> /cygdrive/d/workspace/personal/src/%DEST%/a/b/c/test.txt
└── foo
└── bar
└── baz -> /cygdrive/d/workspace/personal/src/%DEST%/foo/bar/baz
5 directories, 2 files
```
For my personal real-life usage examples, see
* my [Linux/Cygwin environment],
* configuration files for various [Windows apps].
[Linux/Cygwin environment]: https://github.com/egor-tensin/linux-home
[Windows apps]: https://github.com/egor-tensin/windows-home
Limitations
-----------
Variable names must be alphanumeric.
More precisely, the corresponding directory names must match the
`^%[_[:alpha:]][_[:alnum:]]*%$` regular expression.
Consequently, `ProgramFiles(x86)` (and other weird variable names Windows
allows) are not supported.
A special variable name `CONFIG_LINKS_ROOT` is resolved to the root path, "/".
License
-------
Distributed under the MIT License.
See [LICENSE.txt] for details.
[LICENSE.txt]: LICENSE.txt
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