From 5bf5c47a44b4cea3afc9b80fdaf13cc2637657ac Mon Sep 17 00:00:00 2001
From: Gabor Javorszky <gabor@suborbital.dev>
Date: Wed, 22 Feb 2023 16:32:59 +0000
Subject: [PATCH 1/4] Add indirection to setting log level from env vars

---
 go.mod               |  1 +
 go.sum               |  2 ++
 loglevel/loglevel.go | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 loglevel/loglevel.go

diff --git a/go.mod b/go.mod
index 80d3fcd..ba0bf10 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/labstack/echo/v4 v4.10.2
 	github.com/pkg/errors v0.9.1
 	github.com/rs/zerolog v1.29.0
+	github.com/sethvargo/go-envconfig v0.9.0
 	github.com/stretchr/testify v1.8.1
 	go.opentelemetry.io/otel v1.13.0
 	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.36.0
diff --git a/go.sum b/go.sum
index f4953fe..f4f091a 100644
--- a/go.sum
+++ b/go.sum
@@ -169,6 +169,8 @@ github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFR
 github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/rs/zerolog v1.29.0 h1:Zes4hju04hjbvkVkOhdl2HpZa+0PmVwigmo8XoORE5w=
 github.com/rs/zerolog v1.29.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
+github.com/sethvargo/go-envconfig v0.9.0 h1:Q6FQ6hVEeTECULvkJZakq3dZMeBQ3JUpcKMfPQbKMDE=
+github.com/sethvargo/go-envconfig v0.9.0/go.mod h1:Iz1Gy1Sf3T64TQlJSvee81qDhf7YIlt8GMUX6yyNFs0=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
diff --git a/loglevel/loglevel.go b/loglevel/loglevel.go
new file mode 100644
index 0000000..9319a78
--- /dev/null
+++ b/loglevel/loglevel.go
@@ -0,0 +1,39 @@
+package loglevel
+
+import (
+	"context"
+
+	"github.com/rs/zerolog"
+
+	"github.com/sethvargo/go-envconfig"
+)
+
+type Config struct {
+	Debug bool `env:"DEBUG,default=false"`
+}
+
+func SetGlobal() {
+	var c Config
+	if err := envconfig.Process(context.Background(), &c); err != nil {
+		// do nothing, leave it at the default "not debug, therefore info+"
+	}
+
+	zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	if c.Debug {
+		zerolog.SetGlobalLevel(zerolog.DebugLevel)
+	}
+}
+
+func SetLoggerLevel(l zerolog.Logger) zerolog.Logger {
+	lvl := zerolog.InfoLevel
+	var c Config
+	if err := envconfig.Process(context.Background(), &c); err != nil {
+		// do nothing, leave it at the default "not debug, therefore info+"
+	}
+
+	if c.Debug {
+		lvl = zerolog.DebugLevel
+	}
+
+	return l.Level(lvl)
+}

From 221a712a8d1451cd913acab89953830e01edeb75 Mon Sep 17 00:00:00 2001
From: Gabor Javorszky <gabor@suborbital.dev>
Date: Wed, 22 Feb 2023 16:46:37 +0000
Subject: [PATCH 2/4] Add default log level functions

---
 loglevel/loglevel.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/loglevel/loglevel.go b/loglevel/loglevel.go
index 9319a78..bc57eb0 100644
--- a/loglevel/loglevel.go
+++ b/loglevel/loglevel.go
@@ -37,3 +37,26 @@ func SetLoggerLevel(l zerolog.Logger) zerolog.Logger {
 
 	return l.Level(lvl)
 }
+
+func FromEnv(prefix string) zerolog.Level {
+	return FromLookuper(prefix, envconfig.OsLookuper())
+}
+
+func FromLookuper(prefix string, l envconfig.Lookuper) zerolog.Level {
+	l = envconfig.PrefixLookuper(prefix, l)
+	c := getC(l)
+
+	if c.Debug {
+		return zerolog.DebugLevel
+	}
+
+	return zerolog.InfoLevel
+}
+
+func getC(l envconfig.Lookuper) Config {
+	var c Config
+	if err := envconfig.ProcessWith(context.Background(), &c, l); err != nil {
+		// do nothing
+	}
+	return c
+}

From 38350bd8c009888df3171dadf8c6aa90e45caf6d Mon Sep 17 00:00:00 2001
From: Gabor Javorszky <gabor@suborbital.dev>
Date: Wed, 22 Feb 2023 17:12:03 +0000
Subject: [PATCH 3/4] Add baseline logger

---
 loglevel/loglevel.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/loglevel/loglevel.go b/loglevel/loglevel.go
index bc57eb0..6e6b958 100644
--- a/loglevel/loglevel.go
+++ b/loglevel/loglevel.go
@@ -2,6 +2,7 @@ package loglevel
 
 import (
 	"context"
+	"os"
 
 	"github.com/rs/zerolog"
 
@@ -60,3 +61,11 @@ func getC(l envconfig.Lookuper) Config {
 	}
 	return c
 }
+
+func Baseline(prefix string) zerolog.Logger {
+	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+	return zerolog.New(os.Stderr).With().
+		Timestamp().
+		Logger().
+		Level(FromEnv(prefix))
+}

From b4b57ce7cce3b9fc2c14454cfe2104b016c31a65 Mon Sep 17 00:00:00 2001
From: Gabor Javorszky <gabor@suborbital.dev>
Date: Wed, 22 Feb 2023 17:21:37 +0000
Subject: [PATCH 4/4] Fix lint errors

---
 loglevel/loglevel.go | 1 -
 1 file changed, 1 deletion(-)

diff --git a/loglevel/loglevel.go b/loglevel/loglevel.go
index 6e6b958..a6725fc 100644
--- a/loglevel/loglevel.go
+++ b/loglevel/loglevel.go
@@ -5,7 +5,6 @@ import (
 	"os"
 
 	"github.com/rs/zerolog"
-
 	"github.com/sethvargo/go-envconfig"
 )