chore: improve some variable names

Existing names were really similar to imported package names or other
variables.

internal/watcher/instance/nginx_process_parser.go

@@ -66,21 +66,20 @@ func (npp *NginxProcessParser) Parse(ctx context.Context, processes []*nginxproc
 	instanceMap := make(map[string]*mpi.Instance)   // key is instanceID
 	workers := make(map[int32][]*mpi.InstanceChild) // key is ppid of process
 
-	nginxProcesses := convertToMap(processes)
+	processesByPID := convertToMap(processes)
 
-	for _, nginxProcess := range nginxProcesses {
-		// Here we are determining if the nginxProcess is a worker process
-		if nginxProcess.IsWorker() {
+	for _, proc := range processesByPID {
+		if proc.IsWorker() {
 			// Here we are determining if the worker process has a master
-			if masterProcess, ok := nginxProcesses[nginxProcess.PPID]; ok {
+			if masterProcess, ok := processesByPID[proc.PPID]; ok {
 				workers[masterProcess.PID] = append(workers[masterProcess.PID],
-					&mpi.InstanceChild{ProcessId: nginxProcess.PID})
+					&mpi.InstanceChild{ProcessId: proc.PID})
 
 				continue
 			}
-			nginxInfo, err := npp.getInfo(ctx, nginxProcess)
+			nginxInfo, err := npp.getInfo(ctx, proc)
 			if err != nil {
-				slog.DebugContext(ctx, "Unable to get NGINX info", "pid", nginxProcess.PID, "error", err)
+				slog.DebugContext(ctx, "Unable to get NGINX info", "pid", proc.PID, "error", err)
 
 				continue
 			}
@@ -91,23 +90,23 @@ func (npp *NginxProcessParser) Parse(ctx context.Context, processes []*nginxproc
 
 			if foundInstance, ok := instanceMap[instance.GetInstanceMeta().GetInstanceId()]; ok {
 				foundInstance.GetInstanceRuntime().InstanceChildren = append(foundInstance.GetInstanceRuntime().
-					GetInstanceChildren(), &mpi.InstanceChild{ProcessId: nginxProcess.PID})
+					GetInstanceChildren(), &mpi.InstanceChild{ProcessId: proc.PID})
 
 				continue
 			}
 
 			instance.GetInstanceRuntime().InstanceChildren = append(instance.GetInstanceRuntime().
-				GetInstanceChildren(), &mpi.InstanceChild{ProcessId: nginxProcess.PID})
+				GetInstanceChildren(), &mpi.InstanceChild{ProcessId: proc.PID})
 
 			instanceMap[instance.GetInstanceMeta().GetInstanceId()] = instance
 
 			continue
 		}
 
-		// Here we are determining if the nginxProcess is a master process
-		nginxInfo, err := npp.getInfo(ctx, nginxProcess)
+		// proc is a master process
+		nginxInfo, err := npp.getInfo(ctx, proc)
 		if err != nil {
-			slog.DebugContext(ctx, "Unable to get NGINX info", "pid", nginxProcess.PID, "error", err)
+			slog.DebugContext(ctx, "Unable to get NGINX info", "pid", proc.PID, "error", err)
 
 			continue
 		}
@@ -125,13 +124,13 @@ func (npp *NginxProcessParser) Parse(ctx context.Context, processes []*nginxproc
 	return instanceMap
 }
 
-func (npp *NginxProcessParser) getInfo(ctx context.Context, nginxProcess *nginxprocess.Process) (*Info, error) {
-	exePath := nginxProcess.Exe
+func (npp *NginxProcessParser) getInfo(ctx context.Context, proc *nginxprocess.Process) (*Info, error) {
+	exePath := proc.Exe
 
 	if exePath == "" {
 		exePath = npp.getExe(ctx)
 		if exePath == "" {
-			return nil, fmt.Errorf("unable to find NGINX exe for process %d", nginxProcess.PID)
+			return nil, fmt.Errorf("unable to find NGINX exe for process %d", proc.PID)
 		}
 	}
 
@@ -145,7 +144,7 @@ func (npp *NginxProcessParser) getInfo(ctx context.Context, nginxProcess *nginxp
 	nginxInfo = parseNginxVersionCommandOutput(ctx, outputBuffer)
 
 	nginxInfo.ExePath = exePath
-	nginxInfo.ProcessID = nginxProcess.PID
+	nginxInfo.ProcessID = proc.PID
 
 	loadableModules := getLoadableModules(nginxInfo)
 	nginxInfo.LoadableModules = loadableModules
@@ -383,11 +382,11 @@ func readDirectory(dir, extension string) (files []string, err error) {
 }
 
 func convertToMap(processes []*nginxprocess.Process) map[int32]*nginxprocess.Process {
-	nginxProcesses := make(map[int32]*nginxprocess.Process)
+	processesByPID := make(map[int32]*nginxprocess.Process)
 
 	for _, p := range processes {
-		nginxProcesses[p.PID] = p
+		processesByPID[p.PID] = p
 	}
 
-	return nginxProcesses
+	return processesByPID
 }