Allow fractional percentages (fixes #2233)

lib/config/config.go

@@ -75,7 +75,7 @@ type FolderConfiguration struct {
 	RescanIntervalS       int                         `xml:"rescanIntervalS,attr" json:"rescanIntervalS"`
 	IgnorePerms           bool                        `xml:"ignorePerms,attr" json:"ignorePerms"`
 	AutoNormalize         bool                        `xml:"autoNormalize,attr" json:"autoNormalize"`
-	MinDiskFreePct        int                         `xml:"minDiskFreePct" json:"minDiskFreePct"`
+	MinDiskFreePct        float64                     `xml:"minDiskFreePct" json:"minDiskFreePct"`
 	Versioning            VersioningConfiguration     `xml:"versioning" json:"versioning"`
 	Copiers               int                         `xml:"copiers" json:"copiers"` // This defines how many files are handled concurrently.
 	Pullers               int                         `xml:"pullers" json:"pullers"` // Defines how many blocks are fetched at the same time, possibly between separate copier routines.
@@ -244,7 +244,7 @@ type OptionsConfiguration struct {
 	DatabaseBlockCacheMiB   int      `xml:"databaseBlockCacheMiB" json:"databaseBlockCacheMiB" default:"0"`
 	PingTimeoutS            int      `xml:"pingTimeoutS" json:"pingTimeoutS" default:"30"`
 	PingIdleTimeS           int      `xml:"pingIdleTimeS" json:"pingIdleTimeS" default:"60"`
-	MinHomeDiskFreePct      int      `xml:"minHomeDiskFreePct" json:"minHomeDiskFreePct" default:"1"`
+	MinHomeDiskFreePct      float64  `xml:"minHomeDiskFreePct" json:"minHomeDiskFreePct" default:"1"`
 }
 
 func (orig OptionsConfiguration) Copy() OptionsConfiguration {
@@ -585,6 +585,13 @@ func setDefaults(data interface{}) error {
 				}
 				f.SetInt(i)
 
+			case float64:
+				i, err := strconv.ParseFloat(v, 64)
+				if err != nil {
+					return err
+				}
+				f.SetFloat(i)
+
 			case bool:
 				f.SetBool(v == "true")
 

lib/config/config_test.go

@@ -174,7 +174,7 @@ func TestOverriddenValues(t *testing.T) {
 		DatabaseBlockCacheMiB:   42,
 		PingTimeoutS:            60,
 		PingIdleTimeS:           120,
-		MinHomeDiskFreePct:      5,
+		MinHomeDiskFreePct:      5.2,
 	}
 
 	cfg, err := Load("testdata/overridenvalues.xml", device1)

lib/config/testdata/overridenvalues.xml

@@ -31,6 +31,6 @@
         <databaseBlockCacheMiB>42</databaseBlockCacheMiB>
         <pingTimeoutS>60</pingTimeoutS>
         <pingIdleTimeS>120</pingIdleTimeS>
-        <minHomeDiskFreePct>5</minHomeDiskFreePct>
+        <minHomeDiskFreePct>5.2</minHomeDiskFreePct>
     </options>
 </configuration>