[file-roller: 2/5] libarchive: enable read support for 7z

[Paolo Bacchilega <paobac src gnome org>]

commit e8d3d83ec9f24cb5a989af7608538a738200c9d4
Author: Peter Keresztes Schmidt <carbenium outlook com>
Date:   Tue Aug 6 04:19:45 2019 +0200

    libarchive: enable read support for 7z
    
    p7zip-like programs still have priority over
    the libarchive implementation.

 src/fr-archive-libarchive.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/src/fr-archive-libarchive.c b/src/fr-archive-libarchive.c
index 8e8841b3..b0ddcefd 100644
--- a/src/fr-archive-libarchive.c
+++ b/src/fr-archive-libarchive.c
@@ -111,9 +111,13 @@ fr_archive_libarchive_get_capabilities (FrArchive  *archive,
 
        capabilities = FR_ARCHIVE_CAN_STORE_MANY_FILES;
 
-       /* write-only formats */
        if (strcmp (mime_type, "application/x-7z-compressed") == 0) {
-               capabilities |= FR_ARCHIVE_CAN_WRITE;
+               if (_g_program_is_available ("7za", check_command) ||
+                   _g_program_is_available ("7zr", check_command) ||
+                   _g_program_is_available ("7z", check_command))
+                       return capabilities;
+
+               capabilities |= FR_ARCHIVE_CAN_READ_WRITE;
                return capabilities;
        }