vala: Drop "explicit" from ValaSourceFile and use "from_commandline"

vala/valagirparser.vala

@@ -1917,7 +1917,7 @@ public class Vala.GirParser : CodeVisitor {
 				if (context.has_package (pkg)) {
 					// package already provided elsewhere, stop parsing this GIR
 					// if it was not passed explicitly
-					if (!this.current_source_file.explicit) {
+					if (!this.current_source_file.from_commandline) {
 						return;
 					}
 				} else {

vala/valasourcefile.vala

@@ -124,11 +124,6 @@ public class Vala.SourceFile {
 	 */
 	public bool used { get; set; }
 
-	/**
-	 * Whether this source-file was explicitly passed on the commandline.
-	 */
-	public bool explicit { get; set; }
-
 	private ArrayList<Comment> comments = new ArrayList<Comment> ();
 
 	public List<UsingDirective> current_using_directives { get; set; default = new ArrayList<UsingDirective> (); }

vapigen/valavapigen.vala

@@ -132,7 +132,7 @@ class Vala.VAPIGen {
 		foreach (string source in sources) {
 			if (FileUtils.test (source, FileTest.EXISTS)) {
 				var source_file = new SourceFile (context, SourceFileType.PACKAGE, source);
-				source_file.explicit = true;
+				source_file.from_commandline = true;
 				context.add_source_file (source_file);
 			} else {
 				Report.error (null, "%s not found".printf (source));
@@ -190,7 +190,7 @@ class Vala.VAPIGen {
 							}
 						}
 					}
-					if (file.explicit && file.package_name != null) {
+					if (file.from_commandline && file.package_name != null) {
 						package_names += file.package_name;
 					}
 				}