Merge branch 'master' of ssh://git-annex.branchable.com

doc/forum/Old_versions_of_files_are_not_dropped_even_though_enough_copies_exist.mdwn

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+When a changed version of a file is created after `git annex unlock && change-file && git annex add` the old file inside `.git/annex/objects` is retained and cannot be removed with `git annex drop`.
+When I checkout a commit which has the old version of the file I can easily `git annex drop` it and then it also vanishes from `.git/annex/objects`.
+
+Look at the following script which reproduces the behavior.
+Is this behavior intended?
+
+My use case is a big music library which does not fit onto my laptop.
+So for updating the metadata in the files I basically run `git annex get <folder> && git annex unlock <folder>` then update all files in that folder and then run `git annex add <folder> && git commit && git copy --to remote && git annex drop <folder>`.
+This works perfectly but the problem is, that all old versions of changed files are retained in `.git/annex/objects` which in no time filled my drive to 100%.
+
+EDIT: As a clarification, I would expect git-annex to also drop the old versions of the file if enough copies exist…
+
+The script:
+
+    #!/usr/bin/env bash
+    cd /tmp
+    git init client
+    cd client
+    git annex init
+    git annex numcopies 1
+    dd if=/dev/zero of=zero bs=1M count=4
+    git annex add zero
+    git commit -m 'Checkin'
+    cd ..
+    git clone client remote
+    cd client
+    git remote add remote ../remote
+    git annex sync
+    git annex copy --to remote
+    git annex drop zero
+    git annex get zero
+    git annex unlock zero
+    echo test >> zero
+    git annex add zero
+    git commit -m 'Update'
+    git annex copy --to remote
+    git annex drop zero
+    cd ..
+    tree {client,remote}/.git/annex/objects
+    cd client
+    git checkout master~
+    git annex drop zero
+    git checkout master
+    cd ..
+    tree {client,remote}/.git/annex/objects

doc/forum/Old_versions_of_files_are_not_dropped_even_though_enough_copies_exist/comment_1_d43c3b97af1d9d2d4534b40a43567420._comment

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+[[!comment format=mdwn
+ username="guzik.sergey@9391b6c15e4938a539e36fbe5bab71df07111d2e"
+ nickname="guzik.sergey"
+ avatar="http://cdn.libravatar.org/avatar/69073e903eefa0bc2755123b26441a2f"
+ subject="comment 1"
+ date="2019-01-13T14:50:44Z"
+ content="""
+The behaviour you described is intended, git annex preserves all versions of all files. Those old file are refered in git annex documentation as `unused`, so you can search for this term. Following are main commands:
+
+- [git annex unused](https://git-annex.branchable.com/git-annex-unused/)
+- [git annex dropunused](https://git-annex.branchable.com/git-annex-dropunused/)
+- [git annex drop --unused](https://git-annex.branchable.com/git-annex-drop/)
+"""]]

doc/forum/Sync_files_via_remote_server.mdwn

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+I have two local devices set up with the same remote server (a bare repo following https://git-annex.branchable.com/tips/centralized_git_repository_tutorial/on_your_own_server/)
+
+I can sync and move files to/from each device. But I can't see the files pushed by one device on the other (or vice-versa).
+
+So from desktop I sync file "a" and from android I sync file "b" but I can't do "git annex copy b --from origin" on the desktop.