Modernize invertergui: MQTT write support, HA integration, UI updates

vendor/github.com/prometheus/procfs/net_unix.go

@@ -1,4 +1,4 @@
-// Copyright 2018 The Prometheus Authors
+// Copyright The Prometheus Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -108,25 +108,25 @@ func parseNetUNIX(r io.Reader) (*NetUNIX, error) {
 		line := s.Text()
 		item, err := nu.parseLine(line, hasInode, minFields)
 		if err != nil {
-			return nil, fmt.Errorf("%s: /proc/net/unix encountered data %q: %w", ErrFileParse, line, err)
+			return nil, fmt.Errorf("%w: /proc/net/unix encountered data %q: %w", ErrFileParse, line, err)
 		}
 
 		nu.Rows = append(nu.Rows, item)
 	}
 
 	if err := s.Err(); err != nil {
-		return nil, fmt.Errorf("%s: /proc/net/unix encountered data: %w", ErrFileParse, err)
+		return nil, fmt.Errorf("%w: /proc/net/unix encountered data: %w", ErrFileParse, err)
 	}
 
 	return &nu, nil
 }
 
-func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine, error) {
+func (u *NetUNIX) parseLine(line string, hasInode bool, minFields int) (*NetUNIXLine, error) {
 	fields := strings.Fields(line)
 
 	l := len(fields)
-	if l < min {
-		return nil, fmt.Errorf("%w: expected at least %d fields but got %d", ErrFileParse, min, l)
+	if l < minFields {
+		return nil, fmt.Errorf("%w: expected at least %d fields but got %d", ErrFileParse, minFields, l)
 	}
 
 	// Field offsets are as follows:
@@ -136,29 +136,29 @@ func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine,
 
 	users, err := u.parseUsers(fields[1])
 	if err != nil {
-		return nil, fmt.Errorf("%s: ref count %q: %w", ErrFileParse, fields[1], err)
+		return nil, fmt.Errorf("%w: ref count %q: %w", ErrFileParse, fields[1], err)
 	}
 
 	flags, err := u.parseFlags(fields[3])
 	if err != nil {
-		return nil, fmt.Errorf("%s: Unable to parse flags %q: %w", ErrFileParse, fields[3], err)
+		return nil, fmt.Errorf("%w: Unable to parse flags %q: %w", ErrFileParse, fields[3], err)
 	}
 
 	typ, err := u.parseType(fields[4])
 	if err != nil {
-		return nil, fmt.Errorf("%s: Failed to parse type %q: %w", ErrFileParse, fields[4], err)
+		return nil, fmt.Errorf("%w: Failed to parse type %q: %w", ErrFileParse, fields[4], err)
 	}
 
 	state, err := u.parseState(fields[5])
 	if err != nil {
-		return nil, fmt.Errorf("%s: Failed to parse state %q: %w", ErrFileParse, fields[5], err)
+		return nil, fmt.Errorf("%w: Failed to parse state %q: %w", ErrFileParse, fields[5], err)
 	}
 
 	var inode uint64
 	if hasInode {
 		inode, err = u.parseInode(fields[6])
 		if err != nil {
-			return nil, fmt.Errorf("%s failed to parse inode %q: %w", ErrFileParse, fields[6], err)
+			return nil, fmt.Errorf("%w failed to parse inode %q: %w", ErrFileParse, fields[6], err)
 		}
 	}
 
@@ -172,7 +172,7 @@ func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine,
 	}
 
 	// Path field is optional.
-	if l > min {
+	if l > minFields {
 		// Path occurs at either index 6 or 7 depending on whether inode is
 		// already present.
 		pathIdx := 7