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>
… as it is possible to do it when interpolating. It also fixes when
there is 2 variables on the same *value* (in the composefile, on the
same line)
Finaly, renaming the default, used in cli, pattern to `defaultPattern`
to not be shadowed unintentionally.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
It allows to get easily all the variables defined in a
composefile (the `map[string]interface{}` representation that
`loader.ParseYAML` returns at least) and their default value too.
This commit also does some small function extract on substitution
funcs to reduce a tiny bit duplication.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
- Add the possibility to skip interpolation
- Add the possibility to skip schema validation
- Allow customizing the substitution function, to add special cases.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
This mess things up using the `Substitute` method from
outside (i.e. the error is nil but not nil kinda)
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
JoeWrightss
Sebastiaan van Stijn
Vincent Demeester
Arash Deshmeh
Daniel Nephin
Daniel Nephin