[Libguestfs] [PATCH nbdkit 6/6] xz: Make the file= parameter into a magic config key.

--- docs/nbdkit.pod | 8 ++++---- filters/cow/nbdkit-cow-filter.pod | 2 +- plugins/xz/nbdkit-xz-plugin.pod | 3 +++ plugins/xz/xz.c | 3 ++- tests/test-xz.c | 2 +- 5 files changed, 11 insertions(+), 7 deletions(-) diff --git a/docs/nbdkit.pod b/docs/nbdkit.pod index 4f72502..da9d749 100644 --- a/docs/nbdkit.pod +++ b/docs/nbdkit.pod @@ -75,7 +75,7 @@ Serve only the first partition from compressed disk image F<disk.img.xz>, combining L<nbdkit-xz-plugin(1)> and L<nbdkit-partition-filter(1)>: - nbdkit --filter=partition xz file=disk.img.xz partition=1 + nbdkit --filter=partition xz disk.img.xz partition=1 To understand this command line: @@ -83,9 +83,9 @@ To understand this command line: │ ┌─────┴────┐ │ │ - nbdkit --filter=partition xz file=disk.img.xz partition=1 - │ │ - └───────────────┬───────────────────┘ + nbdkit --filter=partition xz disk.img.xz partition=1 + │ │ + └─────────────┬─────────────────┘ │ filter name and filter parameter diff --git a/filters/cow/nbdkit-cow-filter.pod b/filters/cow/nbdkit-cow-filter.pod index 80100e7..d5cd735 100644 --- a/filters/cow/nbdkit-cow-filter.pod +++ b/filters/cow/nbdkit-cow-filter.pod @@ -65,7 +65,7 @@ L<nbdkit-xz-plugin(1)> only supports read access, but you can provide temporary write access by doing (although this does B<not> save changes to the file): - nbdkit --filter=cow xz file=disk.xz + nbdkit --filter=cow xz disk.xz =head1 CREATING A DIFF WITH QEMU-IMG diff --git a/plugins/xz/nbdkit-xz-plugin.pod b/plugins/xz/nbdkit-xz-plugin.pod index 2c9ab6e..42ba426 100644 --- a/plugins/xz/nbdkit-xz-plugin.pod +++ b/plugins/xz/nbdkit-xz-plugin.pod @@ -59,6 +59,9 @@ Serve the file named C<FILENAME.xz>. This parameter is required. +In nbdkit E<ge> 1.7, C<file=> may be omitted if the filename does not +start with a C<-> or contain an C<=> character. + =item B<maxblock=>SIZE The maximum block size that the plugin will read. The plugin will diff --git a/plugins/xz/xz.c b/plugins/xz/xz.c index f45e489..a88d713 100644 --- a/plugins/xz/xz.c +++ b/plugins/xz/xz.c @@ -1,5 +1,5 @@ /* nbdkit - * Copyright (C) 2013 Red Hat Inc. + * Copyright (C) 2013-2018 Red Hat Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -250,6 +250,7 @@ static struct nbdkit_plugin plugin = { .config = xz_config, .config_complete = xz_config_complete, .config_help = xz_config_help, + .magic_config_key = "file", .open = xz_open, .close = xz_close, .get_size = xz_get_size, diff --git a/tests/test-xz.c b/tests/test-xz.c index ef58d59..46b1d04 100644 --- a/tests/test-xz.c +++ b/tests/test-xz.c @@ -51,7 +51,7 @@ main (int argc, char *argv[]) int r; char *data; - if (test_start_nbdkit ("xz", "-r", "file=disk.xz", NULL) == -1) + if (test_start_nbdkit ("xz", "-r", "disk.xz", NULL) == -1) exit (EXIT_FAILURE); g = guestfs_create (); -- 2.18.0