Fix compilation without conntrack collector

Entry collector uses readUintFromFile() function which is defined by
conntrack collector. Thus, it is impossible to build node_exporter w/o
conntrack collector. Fix this by factoring out the function into
helper.go file.

Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/collector/conntrack_linux.go b/collector/conntrack_linux.go
index 943155b..3f43571 100644
--- a/collector/conntrack_linux.go
+++ b/collector/conntrack_linux.go
@@ -16,10 +16,6 @@
 package collector
 
 import (
-        "io/ioutil"
-        "strconv"
-        "strings"
-
         "github.com/prometheus/client_golang/prometheus"
 )
 
@@ -67,15 +63,3 @@ func (c *conntrackCollector) Update(ch chan<- prometheus.Metric) (err error) {
 
         return nil
 }
-
-func readUintFromFile(path string) (uint64, error) {
-        data, err := ioutil.ReadFile(path)
-        if err != nil {
-                return 0, err
-        }
-        value, err := strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64)
-        if err != nil {
-                return 0, err
-        }
-        return value, nil
-}