added flag to set the maximum number of history versions, set default to 1

contentserver.go

@@ -35,9 +35,9 @@ var (
 	flagWebserverAddress = flag.String("webserver-address", "", "address to bind web server host:port, when empty no webserver will be spawned")
 	flagWebserverPath    = flag.String("webserver-path", "/contentserver", "path to export the webserver on - useful when behind a proxy")
 	flagVarDir           = flag.String("var-dir", "/var/lib/contentserver", "where to put my data")
-	flagDebug            = flag.Bool("debug", false, "toggle debug mode")
 
 	// debugging / profiling
+	flagDebug     = flag.Bool("debug", false, "toggle debug mode")
 	flagFreeOSMem = flag.Int("free-os-mem", 0, "free OS mem every X minutes")
 	flagHeapDump  = flag.Int("heap-dump", 0, "dump heap every X minutes")
 )

repo/history.go

@@ -3,6 +3,7 @@ package repo
 import (
 	"bytes"
 	"errors"
+	"flag"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -16,9 +17,10 @@ import (
 const (
 	historyRepoJSONPrefix = "contentserver-repo-"
 	historyRepoJSONSuffix = ".json"
-	maxHistoryVersions    = 20
 )
 
+var flagMaxHistoryVersions = flag.Int("max-history", 1, "set the maximum number of content backup files")
+
 type history struct {
 	varDir string
 }
@@ -63,7 +65,7 @@ func (h *history) getHistory() (files []string, err error) {
 }
 
 func (h *history) cleanup() error {
-	files, err := h.getFilesForCleanup(maxHistoryVersions)
+	files, err := h.getFilesForCleanup(*flagMaxHistoryVersions)
 	if err != nil {
 		return err
 	}