Add -e argument to soong_zip to allow setting an explicit filename

soong_zip normally takes the name of the input source file as the
name of the file in the zip, which is ideal for zipping up
directories but not for constructing arbitrary zip files.  Add a
-e argument that explicitly sets the path in the zip file for
the next -f argument.

Bug: 254867347
Test: zip_test.go
Change-Id: If9d62c1a0064a485aebddf6d2a661f63f3e60b0f
diff --git a/zip/zip_test.go b/zip/zip_test.go
index e7fdea8..c64c3f4 100644
--- a/zip/zip_test.go
+++ b/zip/zip_test.go
@@ -454,6 +454,60 @@
 				fhWithSHA256("c", fileC, zip.Deflate, sha256FileC),
 			},
 		},
+		{
+			name: "explicit path",
+			args: fileArgsBuilder().
+				ExplicitPathInZip("foo").
+				File("a/a/a").
+				File("a/a/b"),
+			compressionLevel: 9,
+
+			files: []zip.FileHeader{
+				fh("foo", fileA, zip.Deflate),
+				fh("a/a/b", fileB, zip.Deflate),
+			},
+		},
+		{
+			name: "explicit path with prefix",
+			args: fileArgsBuilder().
+				PathPrefixInZip("prefix").
+				ExplicitPathInZip("foo").
+				File("a/a/a").
+				File("a/a/b"),
+			compressionLevel: 9,
+
+			files: []zip.FileHeader{
+				fh("prefix/foo", fileA, zip.Deflate),
+				fh("prefix/a/a/b", fileB, zip.Deflate),
+			},
+		},
+		{
+			name: "explicit path with glob",
+			args: fileArgsBuilder().
+				ExplicitPathInZip("foo").
+				File("a/a/a*").
+				File("a/a/b"),
+			compressionLevel: 9,
+
+			files: []zip.FileHeader{
+				fh("foo", fileA, zip.Deflate),
+				fh("a/a/b", fileB, zip.Deflate),
+			},
+		},
+		{
+			name: "explicit path with junk paths",
+			args: fileArgsBuilder().
+				JunkPaths(true).
+				ExplicitPathInZip("foo/bar").
+				File("a/a/a*").
+				File("a/a/b"),
+			compressionLevel: 9,
+
+			files: []zip.FileHeader{
+				fh("foo/bar", fileA, zip.Deflate),
+				fh("b", fileB, zip.Deflate),
+			},
+		},
 
 		// errors
 		{
@@ -490,6 +544,22 @@
 				File("d/a/a"),
 			err: ConflictingFileError{},
 		},
+		{
+			name: "error explicit path conflicting",
+			args: fileArgsBuilder().
+				ExplicitPathInZip("foo").
+				File("a/a/a").
+				ExplicitPathInZip("foo").
+				File("a/a/b"),
+			err: ConflictingFileError{},
+		},
+		{
+			name: "error explicit path conflicting glob",
+			args: fileArgsBuilder().
+				ExplicitPathInZip("foo").
+				File("a/a/*"),
+			err: ConflictingFileError{},
+		},
 	}
 
 	for _, test := range testCases {