parse checksum even when no EOL is found (#285)

In case a checksum file does not end with '\n', the checksum can still
be valid. When hitting EOF, verify that the read line is non-empty, and
continue with parsing.

checksum.go

@@ -259,7 +259,10 @@ func (c *Client) ChecksumFromFile(checksumFile string, src *url.URL) (*FileCheck
 				return nil, fmt.Errorf(
 					"Error reading checksum file: %s", err)
 			}
-			break
+			if line == "" {
+				break
+			}
+			// parse the line, if we hit EOF, but the line is not empty
 		}
 		checksum, err := parseChecksumLine(line)
 		if err != nil || checksum == nil {

get_test.go

@@ -427,6 +427,12 @@ func TestGetFile_checksum_from_file(t *testing.T) {
 			true,
 			false,
 		},
+		{
+			// checksum file does not have EOL, ends line with EOF
+			"?checksum=file:" + httpChecksums.URL + "/sha512-p-EOF.sum",
+			true,
+			false,
+		},
 	}
 
 	for _, tc := range cases {

testdata/checksum-file/sha512-p-EOF.sum

@@ -0,0 +1 @@
+060a8cc41c501e41b4537029661090597aeb4366702ac3cae8959f24b2c49005d6bd339833ebbeb481b127ac822d70b937c1637c8d0eaf81b6979d4c1d75d0e1