lib/model, lib/protocol: Implement temporary indexes (fixes #950)

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/2252

lib/config/config_test.go

@@ -62,6 +62,7 @@ func TestDefaultValues(t *testing.T) {
 		ReleasesURL:             "https://api.github.com/repos/syncthing/syncthing/releases?per_page=30",
 		AlwaysLocalNets:         []string{},
 		OverwriteNames:          false,
+		TempIndexMinBlocks:      10,
 	}
 
 	cfg := New(device1)
@@ -192,6 +193,7 @@ func TestOverriddenValues(t *testing.T) {
 		ReleasesURL:             "https://localhost/releases",
 		AlwaysLocalNets:         []string{},
 		OverwriteNames:          true,
+		TempIndexMinBlocks:      100,
 	}
 
 	cfg, err := Load("testdata/overridenvalues.xml", device1)

lib/config/folderconfiguration.go

@@ -37,6 +37,7 @@ type FolderConfiguration struct {
 	PullerPauseS          int                         `xml:"pullerPauseS" json:"pullerPauseS"`
 	MaxConflicts          int                         `xml:"maxConflicts" json:"maxConflicts"`
 	DisableSparseFiles    bool                        `xml:"disableSparseFiles" json:"disableSparseFiles"`
+	DisableTempIndexes    bool                        `xml:"disableTempIndexes" json:"disableTempIndexes"`
 
 	Invalid    string `xml:"-" json:"invalid"` // Set at runtime when there is an error, not saved
 	cachedPath string

lib/config/optionsconfiguration.go

@@ -40,6 +40,7 @@ type OptionsConfiguration struct {
 	ReleasesURL             string   `xml:"releasesURL" json:"releasesURL" default:"https://api.github.com/repos/syncthing/syncthing/releases?per_page=30"`
 	AlwaysLocalNets         []string `xml:"alwaysLocalNet" json:"alwaysLocalNets"`
 	OverwriteNames          bool     `xml:"overwriteNames" json:"overwriteNames" default:"false"`
+	TempIndexMinBlocks      int      `xml:"tempIndexMinBlocks" json:"tempIndexMinBlocks" default:"10"`
 
 	DeprecatedUPnPEnabled  bool `xml:"upnpEnabled"`
 	DeprecatedUPnPLeaseM   int  `xml:"upnpLeaseMinutes"`

lib/config/testdata/overridenvalues.xml

@@ -35,5 +35,6 @@
         <urPostInsecurely>true</urPostInsecurely>
         <releasesURL>https://localhost/releases</releasesURL>
         <overwriteNames>true</overwriteNames>
+        <tempIndexMinBlocks>100</tempIndexMinBlocks>
     </options>
 </configuration>