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Add some information about the docker build return code 

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
This commit is contained in:
Sven Dowideit 2015-02-16 10:02:56 +10:00 committed by Tibor Vass
parent 40d499514f
commit 18fea6ea4a
1 changed files with 23 additions and 0 deletions
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docs/sources/reference/commandline/cli.md
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@ -537,6 +537,29 @@ If you use STDIN or specify a `URL`, the system places the contents into a
file called `Dockerfile`, and any `-f`, `--file` option is ignored. In this
scenario, there is no context.
### Return code
On a successful build, a return code of success `0` will be returned.
When the build fails, a non-zero failure code will be returned.
There should be informational output of the reason for failure output
to `STDERR`:
```
$ docker build -t fail .
Sending build context to Docker daemon 2.048 kB
Sending build context to Docker daemon
Step 0 : FROM busybox
---> 4986bf8c1536
Step 1 : RUN exit 13
---> Running in e26670ec7a0a
INFO[0000] The command [/bin/sh -c exit 13] returned a non-zero code: 13
$ echo $?
1
```
### .dockerignore file
If a file named `.dockerignore` exists in the root of `PATH` then it
is interpreted as a newline-separated list of exclusion patterns.
Exclusion patterns match files or directories relative to `PATH` that