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v3 compatibility: Fix `helmfile delete` to not fail when there was no release to be deleted 

`helmfile delete` is designed to be idempotent. That is, it is safe to be run when there is nothing to delete. A change in helm v3 broke that behavior. This enhances Helmfile to be able to behave the same for helm v2 and v3.
This commit is contained in:
Yusuke Kuoka 2019-11-02 15:46:44 +09:00
parent 30751e94f7
commit fbbd7630e7
1 changed files with 11 additions and 0 deletions
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11
pkg/helmexec/exec.go
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@ -133,6 +133,17 @@ func (helm *execer) List(context HelmContext, filter string, flags ...string) (s
}
out, err := helm.exec(append(append(preArgs, args...), flags...), env)
// In v2 we have been expecting `helm list FILTER` prints nothing.
// In v3 helm still prints the header like `NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION`,
// which confuses helmfile's existing logic that treats any non-empty output from `helm list` is considered as the indication
// of the release to exist.
//
// This fixes it by removing the header from the v3 output, so that the output is formatted the same as that of v2.
if helm.isHelm3() {
lines := strings.Split(string(out), "\n")
lines = lines[1:]
out = []byte(strings.Join(lines, "\n"))
}
helm.write(out)
return string(out), err
}