[chore] use our own logging implementation (#716)

* first commit

Signed-off-by: kim <grufwub@gmail.com>

* replace logging with our own log library

Signed-off-by: kim <grufwub@gmail.com>

* fix imports

Signed-off-by: kim <grufwub@gmail.com>

* fix log imports

Signed-off-by: kim <grufwub@gmail.com>

* add license text

Signed-off-by: kim <grufwub@gmail.com>

* fix package import cycle between config and log package

Signed-off-by: kim <grufwub@gmail.com>

* fix empty kv.Fields{} being passed to WithFields()

Signed-off-by: kim <grufwub@gmail.com>

* fix uses of log.WithFields() with whitespace issues and empty slices

Signed-off-by: kim <grufwub@gmail.com>

* *linter related grumbling*

Signed-off-by: kim <grufwub@gmail.com>

* gofmt the codebase! also fix more log.WithFields() formatting issues

Signed-off-by: kim <grufwub@gmail.com>

* update testrig code to match new changes

Signed-off-by: kim <grufwub@gmail.com>

* fix error wrapping in non fmt.Errorf function

Signed-off-by: kim <grufwub@gmail.com>

* add benchmarking of log.Caller() vs non-cached

Signed-off-by: kim <grufwub@gmail.com>

* fix syslog tests, add standard build tags to test runner to ensure consistency

Signed-off-by: kim <grufwub@gmail.com>

* make syslog tests more robust

Signed-off-by: kim <grufwub@gmail.com>

* fix caller depth arithmatic (is that how you spell it?)

Signed-off-by: kim <grufwub@gmail.com>

* update to use unkeyed fields in kv.Field{} instances

Signed-off-by: kim <grufwub@gmail.com>

* update go-kv library

Signed-off-by: kim <grufwub@gmail.com>

* update libraries list

Signed-off-by: kim <grufwub@gmail.com>

* fuck you linter get nerfed

Signed-off-by: kim <grufwub@gmail.com>

Co-authored-by: tobi <31960611+tsmethurst@users.noreply.github.com>

vendor/codeberg.org/gruf/go-kv/field.go

@@ -0,0 +1,105 @@
+package kv
+
+import (
+	"codeberg.org/gruf/go-byteutil"
+)
+
+// bufsize is the default buffer size per field to alloc
+// when calling .AppendFormat() from within .String().
+const bufsize = 64
+
+// Fields is a typedef for a []Field slice to provide
+// slightly more performant string formatting for multiples.
+type Fields []Field
+
+// Get will return the field with given 'key'.
+func (f Fields) Get(key string) (*Field, bool) {
+	for i := 0; i < len(f); i++ {
+		if f[i].K == key {
+			return &f[i], true
+		}
+	}
+	return nil, false
+}
+
+// Set will set an existing field with 'key' to 'value', or append new.
+func (f *Fields) Set(key string, value interface{}) {
+	for i := 0; i < len(*f); i++ {
+		// Update existing value
+		if (*f)[i].K == key {
+			(*f)[i].V = value
+			return
+		}
+	}
+
+	// Append new field
+	*f = append(*f, Field{
+		K: key,
+		V: value,
+	})
+}
+
+// AppendFormat appends a string representation of receiving Field(s) to 'b'.
+func (f Fields) AppendFormat(buf *byteutil.Buffer, vbose bool) {
+	for i := 0; i < len(f); i++ {
+		f[i].AppendFormat(buf, vbose)
+		buf.WriteByte(' ')
+	}
+	if len(f) > 0 {
+		buf.Truncate(1)
+	}
+}
+
+// String returns a string representation of receiving Field(s).
+func (f Fields) String() string {
+	b := make([]byte, 0, bufsize*len(f))
+	buf := byteutil.Buffer{B: b}
+	f.AppendFormat(&buf, false)
+	return buf.String()
+}
+
+// GoString performs .String() but with type prefix.
+func (f Fields) GoString() string {
+	b := make([]byte, 0, bufsize*len(f))
+	buf := byteutil.Buffer{B: b}
+	f.AppendFormat(&buf, true)
+	return "kv.Fields{" + buf.String() + "}"
+}
+
+// Field represents an individual key-value field.
+type Field struct {
+	K string      // Field key
+	V interface{} // Field value
+}
+
+// Key returns the formatted key string of this Field.
+func (f Field) Key() string {
+	buf := byteutil.Buffer{B: make([]byte, 0, bufsize/2)}
+	appendQuoteKey(&buf, f.K)
+	return buf.String()
+}
+
+// String will return a string representation of this Field
+// of the form `key=value` where `value` is formatted using
+// fmt package's `%+v` directive. If the .X = true (verbose),
+// then it uses '%#v'. Both key and value are escaped and
+// quoted if necessary to fit on single line.
+//
+// If the `kvformat` build tag is provided, the formatting
+// will be performed by the `kv/format` package. In this case
+// the value will be formatted using the `{:v}` directive, or
+// `{:?}` if .X = true (verbose).
+func (f Field) String() string {
+	b := make([]byte, 0, bufsize)
+	buf := byteutil.Buffer{B: b}
+	f.AppendFormat(&buf, false)
+	return buf.String()
+}
+
+// GoString performs .String() but with verbose always enabled.
+func (f Field) GoString() string {
+	b := make([]byte, 0, bufsize)
+	buf := byteutil.Buffer{B: b}
+	f.AppendFormat(&buf, true)
+	return buf.String()
+}