git-annex-metadata(1)        General Commands Manual       git-annex-metadata(1)

       git-annex-metadata - sets or gets metadata of a file

       git annex metadata [path ...]

       The content of an annexed file can have any number of metadata fields
       attached to it to describe it. Each metadata field can in turn have any
       number of values.

       This command can be used to set metadata, or show the currently set

       When run without any -s or -t parameters, displays the current metadata.

       Each metadata field has its own "field-lastchanged" metadata, which
       contains the date the field was last changed. Unlike other metadata, this
       cannot be directly modified by this command. It is updated automatically.

       -g field / --get field

              Get the value(s) of a single field.

              The values will be output one per line, with no other output, so
              this is suitable for use in a script.

       -s field=value / --set field=value
              Set a field's value, removing any old values.

       -s field+=value / --set field+=value
              Add an additional value, preserving any old values.

       -s field?=value / --set field?=value
              Set a value, but only if the field does not already have a value

       -s field-=value / --set field-=value
              Remove a value from a field, leaving any other values that the
              field has set.

       -r field / --remove field
              Remove all current values of the field.

       -t tag / --tag tag
              Set a tag. Note that a tag is just a value of the "tag" field.

       -u tag / --unset tag
              Unset a tag.

              Remove all metadata from the specified files.

              When a file is modified and the new version added, git-annex will
              copy over the metadata from the old version of the file. In
              situations where you don't want that copied metadata, you can use
              this option to remove it.

              By default, git annex metadata refuses to recursively set metadata
              throughout the files in a directory. This option enables such
              recursive setting.

       file matching options
              The git-annex-matching-options(1) can be used to specify files to
              act on.

       --all -A
              Specify instead of a file to get/set metadata on all known keys.

              Specify instead of a file to get/set metadata on all files in the
              specified branch or treeish.

              Specify instead of a file to get/set metadata on files found by
              last run of git-annex unused.

              Specify instead of a file to get/set metadata of the specified

       --json Enable JSON output (and input). Each line is a JSON object.

              The format of the JSON objects changed in git-annex version

              Example of the new format:


              Example of the old format, which lacks the inner fields object:


              Messages that would normally be output to standard error are
              included in the json instead.

              Enables batch mode, which can be used to both get, store, and
              unset metadata for multiple files or keys.

              Batch currently only supports JSON input. So, you must enable
              --json along with --batch.

              In batch mode, git-annex reads lines from stdin, which contain
              JSON objects. It replies to each input with an output JSON object.

              The format of the JSON sent to git-annex can be the same as the
              JSON that it outputs. Or, a simplified version. Only the "file"
              (or "key") field is actually necessary.

              For example, to get the current metadata of file foo:


              To get the current metadata of the key k:


              Any metadata fields included in the JSON object will be stored,
              replacing whatever values the fields had before.  To unset a
              field, include it with an empty list of values.

              To change the author of file foo to bar:


              To remove the author of file foo:


              Note that file matching options do not affect the files that are
              processed when in batch mode.

       To set some tags on a file and also its author:

        git annex metadata annexscreencast.ogv -t video -t screencast -s



       Joey Hess <>