[Bug 1005901] [NEW] cannot change temp dir

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You have been subscribed to a public bug by Louis Bouchard (louis-bouchard):

SRU justification :

Duplicity does not honor the TMPDIR, TEMP, TMP or --tempdir redirection
as expected.

Impact :

If the available size in /tmp is too small, restore may fail to complete

Fix :

Backport upstream fix applied in 0.6.21 (Merge proposal from the
upstream task of this bug)

Test Case : 
Note: Incremental backup is necessary so both the full & difftar are required in /tmp which will require more than 50Mb

1) Mount a 50Mb file system under /tmp
~# df -h /tmp
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1        48M  794K   45M   2% /tmp

2) Create a 60Mb file to be backed up under /srv called data
dd if=/proc/kcore of=/srv/data bs=1M count=60

3) Do a full backup of /srv into /backup

duplicity full --name test --encrypt-key A6C785C2 --sign-key A6C785C2
--volsize 25 /srv file:///backup/duply

4) Modify the 60Mb file so it can be picked up by the incremental backup
dd if=/proc/kcore of=/srv/data bs=1M count=10 conv=notrunc oflag=append

5) Do an incremental backup
duplicity incr --name 'duply_test' --encrypt-key A6C785C2 --sign-key A6C785C2 --volsize 25 /srv file:///backup/duply

6) Restore the flag using TMPDIR :
TEMPDIR=/mytemp duplicity --name 'duply_test' --encrypt-key A6C785C2 --sign-key A6C785C2 --verbosity '4' --volsize 25 -t now file:///backup/duply /restore

With the patch, the command will succeed.

Regression :

None expected, this code is used in the version currently available in
Raring

Description of the problem :

When /tmp is too small, duplicity is sometimes unable to do a restore.
Using TMPDIR variable or --tempdir doe not work.

** Affects: duplicity
     Importance: Medium
         Status: Fix Released

** Affects: duplicity (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: duplicity (Ubuntu Precise)
     Importance: Undecided
     Assignee: Louis Bouchard (louis-bouchard)
         Status: In Progress

-- 
cannot change temp dir
https://bugs.launchpad.net/bugs/1005901
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