diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/acquire-additional-files.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/acquire-additional-files.txt b/doc/acquire-additional-files.txt index 68af9a5b0..19c3deb13 100644 --- a/doc/acquire-additional-files.txt +++ b/doc/acquire-additional-files.txt @@ -90,6 +90,11 @@ Additional optional properties: have to ensure your front-end can deal with all compressed fileformats supported by apt (libapt users can e.g. use FileFd, others can use the cat-file command of /usr/lib/apt/apt-helper). +* Fallback-Of: Is by default not set. If it is set and specifies another + target name (see Created-By) which was found in the Release file the + download of this target will be skipped. This can be used to implement + fallback(chain)s to allow transitions like the rename of target files. + The behavior if cycles are formed with Fallback-Of is undefined! * flat{MetaKey,Description}: APT supports two types of repositories: dists-style repositories which are the default and by far the most common which are named after the fact that the files are in an @@ -204,11 +209,11 @@ uppercase and wrapped in $(), as in the configuration file. To get all the filenames of all Translation-en files you can e.g. call: apt-get indextargets --format '$(FILENAME)' "Created-By: Translations" "Language: en" -The line-based filtering and the formating is rather crude and feature- +The line-based filtering and the formatting is rather crude and feature- less by design: The default format is Debians standard format deb822 (in particular: Field names are case-insensitive and the order of fields in the stanza is undefined), so instead of apt reimplementing powerful -filters and formating for this command, it is recommend to use piping +filters and formatting for this command, it is recommend to use piping and dedicated tools like 'grep-dctrl' if you need more than the basics provided. |