Libguestfs - Sep 2016 - [PATCH v3 2/2] v2v: ilnux: detect name of grub2-mkconfig

On Debian family of OSes Grub2 tools are prefixed with 'grub-', not with
'grub2-'. We have to detect the correct name of the tool to use it.

Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
---
 v2v/linux_bootloaders.ml | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/v2v/linux_bootloaders.ml b/v2v/linux_bootloaders.ml
index a5e4c8d..4f53f87 100644
--- a/v2v/linux_bootloaders.ml
+++ b/v2v/linux_bootloaders.ml
@@ -186,6 +186,19 @@ end
 
 (* Grub2 representation. *)
 class bootloader_grub2 (g : G.guestfs) grub_config +
+  let grub2_mkconfig_cmd +    let elems = [
+       "/sbin/grub2-mkconfig";
+       "/usr/sbin/grub2-mkconfig";
+       "/sbin/grub-mkconfig";
+       "/usr/sbin/grub-mkconfig"
+      ] in
+    try List.find (g#is_file ~followsymlinks:true) elems
+    with Not_found ->
+      error (f_"failed to find grub2-mkconfig binary (but Grub2 was
detected on guest)")
+  in
+
 object (self)
   inherit bootloader
 
@@ -218,7 +231,7 @@ object (self)
         g#aug_save ();
 
         try
-          ignore (g#command [| "grub2-mkconfig"; "-o";
grub_config |])
+          ignore (g#command [| grub2_mkconfig_cmd; "-o"; grub_config
|])
         with
           G.Error msg ->
             warning (f_"could not rebuild grub2 configuration file (%s). 
This may mean that grub output will not be sent to the serial port, but
otherwise should be harmless.  Original error message: %s")
@@ -290,7 +303,7 @@ object (self)
   method remove_console = self#grub2_update_console ~remove:true
 
   method update () -    ignore (g#command [| "grub2-mkconfig";
"-o"; grub_config |])
+    ignore (g#command [| grub2_mkconfig_cmd; "-o"; grub_config |])
 end
 
 let detect_bootloader (g : G.guestfs) inspect -- 
2.9.3

The subject needs ilnux -> linux, but the patch itself is fine.

Rich.

On Tue, Sep 13, 2016 at 03:51:31PM +0200, Tomáš Golembiovský
wrote:
> On Debian family of OSes Grub2 tools are prefixed with 'grub-', not
with
> 'grub2-'. We have to detect the correct name of the tool to use it.
> 
> Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
> ---
>  v2v/linux_bootloaders.ml | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/v2v/linux_bootloaders.ml b/v2v/linux_bootloaders.ml
> index a5e4c8d..4f53f87 100644
> --- a/v2v/linux_bootloaders.ml
> +++ b/v2v/linux_bootloaders.ml
> @@ -186,6 +186,19 @@ end
>  
>  (* Grub2 representation. *)
>  class bootloader_grub2 (g : G.guestfs) grub_config > +
> +  let grub2_mkconfig_cmd > +    let elems = [
> +       "/sbin/grub2-mkconfig";
> +       "/usr/sbin/grub2-mkconfig";
> +       "/sbin/grub-mkconfig";
> +       "/usr/sbin/grub-mkconfig"
> +      ] in
> +    try List.find (g#is_file ~followsymlinks:true) elems
> +    with Not_found ->
> +      error (f_"failed to find grub2-mkconfig binary (but Grub2 was
detected on guest)")
> +  in
> +
>  object (self)
>    inherit bootloader
>  
> @@ -218,7 +231,7 @@ object (self)
>          g#aug_save ();
>  
>          try
> -          ignore (g#command [| "grub2-mkconfig"; "-o";
grub_config |])
> +          ignore (g#command [| grub2_mkconfig_cmd; "-o";
grub_config |])
>          with
>            G.Error msg ->
>              warning (f_"could not rebuild grub2 configuration file
(%s).  This may mean that grub output will not be sent to the serial port, but
otherwise should be harmless.  Original error message: %s")
> @@ -290,7 +303,7 @@ object (self)
>    method remove_console = self#grub2_update_console ~remove:true
>  
>    method update () > -    ignore (g#command [|
"grub2-mkconfig"; "-o"; grub_config |])
> +    ignore (g#command [| grub2_mkconfig_cmd; "-o"; grub_config
|])
>  end
>  
>  let detect_bootloader (g : G.guestfs) inspect > -- 
> 2.9.3
> 
> 
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-- 
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