DockerCLI/cli/compose/template
Sebastiaan van Stijn ec3daea021
Fix substitution with non-empty env-var
Due to a typo, substitution would not work if the given
environment-variable was set.

Given the following docker compose file;

```yaml
version: "3.7"

services:
  app:
    image: nginx:${version:-latest}
```

Deploying a stack with `$version` set would ignore the `$version`
environment variable, and use the default value instead;

```bash
version=alpine docker stack deploy -c docker-compose.yml foobar

Creating network foobar_default
Creating service foobar_app

docker service ls

ID                  NAME                MODE                REPLICAS            IMAGE               PORTS
rskkjxe6sm0w        foobar_app          replicated          1/1                 nginx:latest
```

This patch also fixes "soft default" not detecting empty environment variables,
only non-set environment variables.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2018-09-25 22:20:25 +02:00
..
template.go Fix substitution with non-empty env-var 2018-09-25 22:20:25 +02:00
template_test.go Fix substitution with non-empty env-var 2018-09-25 22:20:25 +02:00