fix: Make the fileresolver Support Prefix Match of Files (#3820)

* fix the dpkg files pattern detection

Signed-off-by: Yuntao Hu <victorhu493@gmail.com>

* consider slash before the path is concatenated

Signed-off-by: Yuntao Hu <victorhu493@gmail.com>

* add test

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Yuntao Hu <victorhu493@gmail.com>
Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/internal/fileresolver/chroot_context.go

@@ -169,7 +169,11 @@ func (r ChrootContext) ToNativeGlob(chrootPath string) (string, error) {
 		return "", err
 	}
 
-	parts[0] = strings.TrimRight(responsePath, "/") + "/"
+	hasSlash := strings.HasSuffix(parts[0], "/")
+	parts[0] = responsePath
+	if hasSlash {
+		parts[0] = strings.TrimRight(parts[0], "/") + "/"
+	}
 
 	return strings.Join(parts, "*"), nil
 }

syft/internal/fileresolver/chroot_context_test.go

@@ -558,6 +558,16 @@ func TestToNativeGlob(t *testing.T) {
 			expectedResult: "/cwd/relative/path/**/file*.txt",
 			expectedError:  nil,
 		},
+		{
+			name: "ending with glob",
+			chrootContext: ChrootContext{
+				root:              "/root",
+				cwdRelativeToRoot: "/cwd",
+			},
+			chrootPath:     "/var/lib/dpkg/info/name.*",
+			expectedResult: "/root/var/lib/dpkg/info/name.*",
+			expectedError:  nil,
+		},
 	}
 
 	for _, tt := range tests {