Added SSH support to enable Git checkouts that use SSH instead of
HTTP(S).
The SSH directory is assumed to be in $HOME/.ssh; however:
export SSH_DIR=/my/custom/dir
will override the setting and allow for configurable settings.
$SSH_DIR is then mounted as host-volume in the Docker container and
placed in /home/<user>/.ssh
This commit will avoid the following error from being reported
on MacOSX:
```
docker run --rm dockcross/linux-armv7 > ./dockcross-linux-armv7
chmod +x ./dockcross-linux-armv7
./dockcross-linux-armv7 bash -c '$CC test/C/hello.c -o hello_arm'
grep: /proc/version: No such file or directory
grep: /proc/version: No such file or directory
```
Reported-by: Chris Warth <cswarth@gmail.com>
This commit follows up on 2e71db2 (dockcross: Ignore deletion error
when running in unprivileged LXC container) by hiding the message
only when (a) the command output matches the expected error message
and (b) is executed on CircleCI.
Doing so will avoid adding "noise" to log of service like CircleCI
that are effectively running docker in unprivileged LXC container.
See #50
This commit removes the complex pipeline leveraging output from
/dev/urandom and simply uses $RANDOM variable. For the purpose
of generating an available container name, it will works well.
Suggested-by: Matt McCormick <matt.mccormick@kitware.com>
As explained in [1], when using dockcross from python subprocess, the
interactive mode is disabled and output of "cat /dev/urandom" is block
buffered instead of being line buffered.
Workaround to this problem is to simply read a fixed amount of characters
from urandom.
The following two snippets illustrates the problem and the
the implemented solution:
Works
```python
import subprocess as sp
sp.check_call("var=$(head -c 500 /dev/urandom | base64 | tr -dc 'a-zA-Z0-9' | fold -w 7 | head -n 1); echo $var", shell=True)
```
=> output random string
Fail:
```python
import subprocess as sp
sp.check_call("var=$(cat /dev/urandom | base64 | tr -dc 'a-zA-Z0-9' | fold -w 7 | head -n 1); echo $var", shell=True)
```
=> Hang
[1] http://stackoverflow.com/questions/16805827/unable-to-read-stdout-from-a-running-process#16806506
where RAND is a 7 characters long randomly generated alphanumeric string.
Note that container name can NOT start with "_",
only [a-zA-Z0-9][a-zA-Z0-9_.-] are allowed
See #50
