49 lines
1.8 KiB
Markdown
49 lines
1.8 KiB
Markdown
git-annex's [[metadata]] works best when files have a lot of useful
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metadata attached to them.
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To make git-annex automatically set the year and month when adding files,
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run: `git config annex.genmetadata true`
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## git commit hook
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A git commit hook can be set up to extract lots of metadata from files
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like photos, mp3s, etc. Whenever annexed files are committed, their
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metadata will be extracted and stored.
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Download [[pre-commit-annex]] and install it in your git-annex repository
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as `.git/hooks/pre-commit-annex`
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Remember to make the script executable! `chmod +x .git/hooks/pre-commit-annex`
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### using extract
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The git commit hook can use extract to get metadata.
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Install it from <http://www.gnu.org/software/libextractor/>
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`apt-get install extract`
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Configure which metadata fields to ask extract for: `git config metadata.extract "artist album title camera_make video_dimensions"`
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To get a list of all possible fields, run: `extract -L | sed 's/ /_/g'`
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### using exiftool
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The git commit hook can also use exiftool to get metadata.
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Install it from <http://owl.phy.queensu.ca/~phil/exiftool/>
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`apt-get install libimage-exiftool-perl`
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Configure which metadata fields to ask exiftool for: `git config metadata.exiftool "Model ImageSize FocusRange GPSAltitude GPSCoordinates"`
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To get a list of all possible fields, run: `exiftool -list`
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### using both extract and exiftool
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If you want some metadata that extract knows about, and other metadata
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that exiftool knows about, just install them both, and set both
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`metadata.extract` and `metadata.exiftool`.
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### overwriting existing metadata
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By default, if a git-annex already has a metadata field for a file,
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its value will not be overwritten with metadata taken from files.
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To allow overwriting, run: `git config metadata.overwrite true`
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