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authorThomas Waldmann <tw@waldmann-edv.de>2022-02-05 17:22:33 +0100
committerThomas Waldmann <tw@waldmann-edv.de>2022-02-05 17:52:25 +0100
commitb430c8d15a0c373ad338d045734adedfe5aeea2a (patch)
treeed89120ea66bc6d6367f91f371d17ba1c960fb82
parent55591b882ee81b91b973cf6b0a6d69dab3458fa6 (diff)
build_usage
-rw-r--r--docs/usage/create.rst.inc8
-rw-r--r--docs/usage/diff.rst.inc74
-rw-r--r--docs/usage/export-tar.rst.inc8
-rw-r--r--docs/usage/extract.rst.inc14
-rw-r--r--docs/usage/help.rst.inc19
-rw-r--r--docs/usage/key_export.rst.inc13
-rw-r--r--docs/usage/list.rst.inc8
-rw-r--r--docs/usage/mount.rst.inc8
-rw-r--r--docs/usage/recreate.rst.inc8
9 files changed, 89 insertions, 71 deletions
diff --git a/docs/usage/create.rst.inc b/docs/usage/create.rst.inc
index 7b06fab2c..e6fa4e3a1 100644
--- a/docs/usage/create.rst.inc
+++ b/docs/usage/create.rst.inc
@@ -59,9 +59,9 @@ borg create
+-------------------------------------------------------+---------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+-------------------------------------------------------+---------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+-------------------------------------------------------+---------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+-------------------------------------------------------+---------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--exclude-caches`` | exclude directories that contain a CACHEDIR.TAG file (http://www.bford.info/cachedir/spec.html) |
+-------------------------------------------------------+---------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
@@ -153,8 +153,8 @@ borg create
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
--exclude-caches exclude directories that contain a CACHEDIR.TAG file (http://www.bford.info/cachedir/spec.html)
--exclude-if-present NAME exclude directories that are tagged by containing a filesystem object with the given NAME
--keep-exclude-tags if tag objects are specified with ``--exclude-if-present``, don't omit the tag objects themselves from the backup archive
diff --git a/docs/usage/diff.rst.inc b/docs/usage/diff.rst.inc
index 21ae9a936..ec3bffc29 100644
--- a/docs/usage/diff.rst.inc
+++ b/docs/usage/diff.rst.inc
@@ -12,41 +12,41 @@ borg diff
.. class:: borg-options-table
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | **positional arguments** |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``REPO::ARCHIVE1`` | repository location and ARCHIVE1 name |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``ARCHIVE2`` | ARCHIVE2 name (no repository location allowed) |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``PATH`` | paths of items inside the archives to compare; patterns are supported |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | **optional arguments** |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--numeric-owner`` | deprecated, use ``--numeric-ids`` instead |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--numeric-ids`` | only consider numeric user and group identifiers |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--same-chunker-params`` | Override check of chunker parameters. |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--sort`` | Sort the output lines by file path. |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--json-lines`` | Format output as JSON Lines. |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | .. class:: borg-common-opt-ref |
- | |
- | :ref:`common_options` |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | **Exclusion options** |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``-e PATTERN``, ``--exclude PATTERN`` | exclude paths matching PATTERN |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
- +-------------------------------------------------------+---------------------------------------+----------------------------------------------------------------------------+
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | **positional arguments** |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``REPO::ARCHIVE1`` | repository location and ARCHIVE1 name |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``ARCHIVE2`` | ARCHIVE2 name (no repository location allowed) |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``PATH`` | paths of items inside the archives to compare; patterns are supported |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | **optional arguments** |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--numeric-owner`` | deprecated, use ``--numeric-ids`` instead |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--numeric-ids`` | only consider numeric user and group identifiers |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--same-chunker-params`` | Override check of chunker parameters. |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--sort`` | Sort the output lines by file path. |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--json-lines`` | Format output as JSON Lines. |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | .. class:: borg-common-opt-ref |
+ | |
+ | :ref:`common_options` |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | **Exclusion options** |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``-e PATTERN``, ``--exclude PATTERN`` | exclude paths matching PATTERN |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+ +-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------+
.. raw:: html
@@ -80,8 +80,8 @@ borg diff
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
Description
diff --git a/docs/usage/export-tar.rst.inc b/docs/usage/export-tar.rst.inc
index 8a235ff27..c898d7b51 100644
--- a/docs/usage/export-tar.rst.inc
+++ b/docs/usage/export-tar.rst.inc
@@ -37,9 +37,9 @@ borg export-tar
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
| | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
| | ``--strip-components NUMBER`` | Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped. |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
@@ -73,8 +73,8 @@ borg export-tar
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
--strip-components NUMBER Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped.
diff --git a/docs/usage/extract.rst.inc b/docs/usage/extract.rst.inc
index 76e3e70b2..ce6ede4cc 100644
--- a/docs/usage/extract.rst.inc
+++ b/docs/usage/extract.rst.inc
@@ -51,9 +51,9 @@ borg extract
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
| | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
| | ``--strip-components NUMBER`` | Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped. |
+-------------------------------------------------------+---------------------------------------+-----------------------------------------------------------------------------------------------------------+
@@ -93,8 +93,8 @@ borg extract
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
--strip-components NUMBER Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped.
@@ -118,4 +118,8 @@ pass over the archive metadata.
.. note::
Currently, extract always writes into the current working directory ("."),
- so make sure you ``cd`` to the right place before calling ``borg extract``. \ No newline at end of file
+ so make sure you ``cd`` to the right place before calling ``borg extract``.
+
+ When parent directories are not extracted (because of using file/directory selection
+ or any other reason), borg can not restore parent directories' metadata, e.g. owner,
+ group, permission, etc. \ No newline at end of file
diff --git a/docs/usage/help.rst.inc b/docs/usage/help.rst.inc
index a477483c1..cd7682db0 100644
--- a/docs/usage/help.rst.inc
+++ b/docs/usage/help.rst.inc
@@ -22,10 +22,9 @@ store all files as `some/path/.../file.ext` and ``borg create
File patterns support these styles: fnmatch, shell, regular expressions,
path prefixes and path full-matches. By default, fnmatch is used for
-``--exclude`` patterns and shell-style is used for the experimental
-``--pattern`` option. For commands that support patterns in their
-``PATH`` argument like (``borg list``), the default pattern is path
-prefix.
+``--exclude`` patterns and shell-style is used for the ``--pattern``
+ option. For commands that support patterns in their ``PATH`` argument
+like (``borg list``), the default pattern is path prefix.
Starting with Borg 1.2, for all but regular expression pattern matching
styles, all paths are treated as relative, meaning that a leading path
@@ -145,11 +144,9 @@ Examples::
EOF
$ borg create --exclude-from exclude.txt backup /
-.. container:: experimental
-
A more general and easier to use way to define filename matching patterns exists
- with the experimental ``--pattern`` and ``--patterns-from`` options. Using these, you
- may specify the backup roots (starting points) and patterns for inclusion/exclusion.
+ with the ``--pattern`` and ``--patterns-from`` options. Using these, you may
+ specify the backup roots (starting points) and patterns for inclusion/exclusion.
A root path starts with the prefix `R`, followed by a path (a plain path, not a
file pattern). An include rule starts with the prefix +, an exclude rule starts
with the prefix -, an exclude-norecurse rule starts with !, all followed by a pattern.
@@ -166,6 +163,12 @@ Examples::
a directory, it won't recurse into it and won't discover any potential matches for
include rules below that directory.
+ .. note::
+
+ It's possible that a sub-directory/file is matched while parent directories are not.
+ In that case, parent directories are not backed up thus their user, group, permission,
+ etc. can not be restored.
+
Note that the default pattern style for ``--pattern`` and ``--patterns-from`` is
shell style (`sh:`), so those patterns behave similar to rsync include/exclude
patterns. The pattern style can be set via the `P` prefix.
diff --git a/docs/usage/key_export.rst.inc b/docs/usage/key_export.rst.inc
index a65d32df9..0a57bf091 100644
--- a/docs/usage/key_export.rst.inc
+++ b/docs/usage/key_export.rst.inc
@@ -77,4 +77,15 @@ data backup.
For repositories using the repokey encryption the key is saved in the
repository in the config file. A backup is thus not strictly needed,
but guards against the repository becoming inaccessible if the file
-is damaged for some reason. \ No newline at end of file
+is damaged for some reason.
+
+Examples::
+
+ borg key export /path/to/repo > encrypted-key-backup
+ borg key export --paper /path/to/repo > encrypted-key-backup.txt
+ borg key export --qr-html /path/to/repo > encrypted-key-backup.html
+ # Or pass the output file as an argument instead of redirecting stdout:
+ borg key export /path/to/repo encrypted-key-backup
+ borg key export --paper /path/to/repo encrypted-key-backup.txt
+ borg key export --qr-html /path/to/repo encrypted-key-backup.html
+
diff --git a/docs/usage/list.rst.inc b/docs/usage/list.rst.inc
index 7799b4daf..456f42a66 100644
--- a/docs/usage/list.rst.inc
+++ b/docs/usage/list.rst.inc
@@ -53,9 +53,9 @@ borg list
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
.. raw:: html
@@ -96,8 +96,8 @@ borg list
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
Description
diff --git a/docs/usage/mount.rst.inc b/docs/usage/mount.rst.inc
index 0ac4caa48..a720f88a1 100644
--- a/docs/usage/mount.rst.inc
+++ b/docs/usage/mount.rst.inc
@@ -55,9 +55,9 @@ borg mount
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--strip-components NUMBER`` | Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped. |
+-----------------------------------------------------------------------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------+
@@ -102,8 +102,8 @@ borg mount
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
--strip-components NUMBER Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped.
diff --git a/docs/usage/recreate.rst.inc b/docs/usage/recreate.rst.inc
index e45784fae..f64e07599 100644
--- a/docs/usage/recreate.rst.inc
+++ b/docs/usage/recreate.rst.inc
@@ -39,9 +39,9 @@ borg recreate
+-------------------------------------------------------+---------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--exclude-from EXCLUDEFILE`` | read exclude patterns from EXCLUDEFILE, one per line |
+-------------------------------------------------------+---------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--pattern PATTERN`` | experimental: include/exclude paths matching PATTERN |
+ | | ``--pattern PATTERN`` | include/exclude paths matching PATTERN |
+-------------------------------------------------------+---------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
- | | ``--patterns-from PATTERNFILE`` | experimental: read include/exclude patterns from PATTERNFILE, one per line |
+ | | ``--patterns-from PATTERNFILE`` | read include/exclude patterns from PATTERNFILE, one per line |
+-------------------------------------------------------+---------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| | ``--exclude-caches`` | exclude directories that contain a CACHEDIR.TAG file (http://www.bford.info/cachedir/spec.html) |
+-------------------------------------------------------+---------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
@@ -95,8 +95,8 @@ borg recreate
Exclusion options
-e PATTERN, --exclude PATTERN exclude paths matching PATTERN
--exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
- --pattern PATTERN experimental: include/exclude paths matching PATTERN
- --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
+ --pattern PATTERN include/exclude paths matching PATTERN
+ --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line
--exclude-caches exclude directories that contain a CACHEDIR.TAG file (http://www.bford.info/cachedir/spec.html)
--exclude-if-present NAME exclude directories that are tagged by containing a filesystem object with the given NAME
--keep-exclude-tags if tag objects are specified with ``--exclude-if-present``, don't omit the tag objects themselves from the backup archive