fijiUpdate: add a configuration flag for skipping

buildSrc/src/main/kotlin/sciview/fiji.gradle.kts

@@ -138,6 +138,12 @@ private fun checksum() {
 private fun update() {
     validateFijiDir()
 
+    val skip = project.properties["fijiUpdateSkip"]?.toString()?.toBoolean() ?: false
+    if (skip) {
+        logger.lifecycle("Skipping Fiji update due to fijiUpdateSkip=true")
+        return
+    }
+
     try {
         runUpdater("add-update-site", updateSite, updateSiteURL)
         runUpdater("update")

gradle.properties

@@ -16,5 +16,7 @@ fijiTestClass=sc.iview.commands.help.About
 # then be separated by | characters. [GIT_HASH] will be replaced with the current Git hash of the project,
 # or by the value given in the gitHash property. [VERSION_NUMBER] will be replaced by project.version.
 fijiTestClassExpectedOutput=[INFO] SciView was created by Kyle Harrington|[GIT_HASH]|[VERSION_NUMBER]
+# Uncomment the next line if you want the fijiUpdate task to be skipped. This is useful if you plan to repeatedly run fijiPopulate without checking for remote updates every time.
+#fijiUpdateSkip=true
 # Uncomment the next line if you want the fijiUpload task to *simulate* an upload rather than actually doing it.
 #fijiUploadDryRun=true