Use compose-go + improvements (#9)

Use compose-go https://github.com/compose-spec/compose-go  to make Katenary parsing compose file the official way.
Add labels:
- `volume-from` (with `same-pod`) to avoid volume repetition
- `ignore` to ignore a service
- `mapenv` (replaces the `env-to-service`) to map environment to helm variable (as a template string)
- `secret-vars` declares variables as secret values

More:
- Now, environment (as secret vars) are set in values.yaml
- Ingress has got annotations in values.yaml
- Probes (liveness probe) are improved
- fixed code to optimize
- many others fixes about path, bad volume check, refactorisation, tests...

helm/probe.go

@@ -0,0 +1,104 @@
+package helm
+
+import (
+	"time"
+
+	"github.com/compose-spec/compose-go/types"
+)
+
+// Probe is a struct that can be used to create a Liveness or Readiness probe.
+type Probe struct {
+	HttpGet      *HttpGet `yaml:"httpGet,omitempty"`
+	Exec         *Exec    `yaml:"exec,omitempty"`
+	TCP          *TCP     `yaml:"tcp,omitempty"`
+	Period       float64  `yaml:"periodSeconds"`
+	InitialDelay float64  `yaml:"initialDelaySeconds"`
+	Success      uint64   `yaml:"successThreshold"`
+	Failure      uint64   `yaml:"failureThreshold"`
+}
+
+// Create a new Probe object that can be apply to HttpProbe or TCPProbe.
+func NewProbe(period, initialDelaySeconds float64, success, failure uint64) *Probe {
+	probe := &Probe{
+		Period:       period,
+		Success:      success,
+		Failure:      failure,
+		InitialDelay: initialDelaySeconds,
+	}
+
+	// fix default values from
+	// https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
+	if period == 0 {
+		probe.Period = 10
+	}
+	if success == 0 {
+		probe.Success = 1
+	}
+	if failure == 0 {
+		probe.Failure = 3
+	}
+	return probe
+}
+
+// NewProbeWithDuration creates a new Probe object with the given duration from types.
+func NewProbeWithDuration(period, initialDelaySeconds *types.Duration, success, failure *uint64) *Probe {
+
+	if period == nil {
+		d := types.Duration(0 * time.Second)
+		period = &d
+	}
+
+	if initialDelaySeconds == nil {
+		d := types.Duration(0 * time.Second)
+		initialDelaySeconds = &d
+	}
+
+	if success == nil {
+		s := uint64(0)
+		success = &s
+	}
+
+	if failure == nil {
+		f := uint64(0)
+		failure = &f
+	}
+
+	p, err := time.ParseDuration(period.String())
+	if err != nil {
+		p = time.Second * 10
+	}
+
+	i, err := time.ParseDuration(initialDelaySeconds.String())
+	if err != nil {
+		i = time.Second * 0
+	}
+
+	return NewProbe(p.Seconds(), i.Seconds(), *success, *failure)
+
+}
+
+// NewProbeFromService creates a new Probe object from a ServiceConfig.
+func NewProbeFromService(s *types.ServiceConfig) *Probe {
+	if s == nil || s.HealthCheck == nil {
+		return NewProbe(0, 0, 0, 0)
+	}
+
+	return NewProbeWithDuration(s.HealthCheck.Interval, s.HealthCheck.StartPeriod, nil, s.HealthCheck.Retries)
+
+}
+
+// HttpGet is a Probe configuration to check http health.
+type HttpGet struct {
+	Path string `yaml:"path"`
+	Port int    `yaml:"port"`
+}
+
+// Execis a Probe configuration to check exec health.
+type Exec struct {
+	Command []string `yaml:"command"`
+}
+
+// TCP is a Probe configuration to check tcp health.
+type TCP struct {
+	Port int `yaml:"port"`
+}