[PATCH] mbuto: add a function to find the difference of two lists

[PATCH] mbuto: add a function to find the difference of two lists

[Sevinj Aghayeva]

Adds a function to find the difference of two lists and use that function to
determine the list of missing modules.

Signed-off-by: Sevinj Aghayeva <sevinj.aghayeva@gmail.com>
---
 mbuto | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/mbuto b/mbuto
index 74c81eb..14176c3 100755
--- a/mbuto
+++ b/mbuto
@@ -245,15 +245,8 @@ profile_kselftests() {
 
 		KMODS="$(${BASENAME} -a -s .ko ${KMODS})"
 
-		__kmods_missing=
-		for __n in ${__kmods_needed}; do
-			__found=0
-			for __f in ${KMODS}; do
-				[ ${__n} = ${__f} ] && __found=1
-			done
-			[ ${__found} -eq 0 ] && \
-				__kmods_missing="${__n} ${__kmods_missing}"
-		done
+		__kmods_missing=$(list_diff "${__kmods_needed}" "${KMODS}")
+
 		if [ ! -z "${__kmods_missing}" ]; then
 			notice "WARNING: missing modules: ${__kmods_missing}"
 		fi
@@ -426,6 +419,22 @@ workers() {
 	while ! ${RMDIR} "${__sync_dir}" 2>/dev/null; do ${SLEEP} 1; done
 }
 
+# list_diff() - Given two lists, $1 and $2, returns the tokens that exist in $1
+# but not in $2
+# $1: list
+# $2: list
+list_diff() {
+	__diff=
+	for __e1 in ${1}; do
+		__found=0
+		for __e2 in ${2}; do
+			[ ${__e1} = ${__e2} ] && __found=1
+		done
+		[ ${__found} -eq 0 ] && __diff="${__e1} ${__diff}"
+	done
+	printf '%s' "${__diff}"
+}
+
 ################################################################################
 
 
-- 
2.25.1

Re: [PATCH] mbuto: add a function to find the difference of two lists

[Stefano Brivio]

Applied, with a couple of minor changes:

On Fri, 15 Apr 2022 00:03:12 -0400
Sevinj Aghayeva <sevinj.aghayeva@gmail.com> wrote:

> Adds a function to find the difference of two lists and use that function to

Used imperative mood ("add") for consistency (with e.g. "use").

> determine the list of missing modules.

Wrapped this to 70 columns -- somewhat arbitrary, I don't even think
there's consensus on current kernel practices, somebody uses 72 or even
76 columns.

Rationale: allow email discussion at a reasonable thread depth without
further wrapping in a "small" terminal.

> Signed-off-by: Sevinj Aghayeva <sevinj.aghayeva@gmail.com>
> ---
>  mbuto | 27 ++++++++++++++++++---------
>  1 file changed, 18 insertions(+), 9 deletions(-)
> 
> diff --git a/mbuto b/mbuto
> index 74c81eb..14176c3 100755
> --- a/mbuto
> +++ b/mbuto
> @@ -245,15 +245,8 @@ profile_kselftests() {
>  
>  		KMODS="$(${BASENAME} -a -s .ko ${KMODS})"
>  
> -		__kmods_missing=
> -		for __n in ${__kmods_needed}; do
> -			__found=0
> -			for __f in ${KMODS}; do
> -				[ ${__n} = ${__f} ] && __found=1
> -			done
> -			[ ${__found} -eq 0 ] && \
> -				__kmods_missing="${__n} ${__kmods_missing}"
> -		done
> +		__kmods_missing=$(list_diff "${__kmods_needed}" "${KMODS}")
> +
>  		if [ ! -z "${__kmods_missing}" ]; then
>  			notice "WARNING: missing modules: ${__kmods_missing}"
>  		fi
> @@ -426,6 +419,22 @@ workers() {
>  	while ! ${RMDIR} "${__sync_dir}" 2>/dev/null; do ${SLEEP} 1; done
>  }
>  
> +# list_diff() - Given two lists, $1 and $2, returns the tokens that exist in $1

Imperative mode ("return" instead of "returns") for consistency, made
it a bit shorter so that it fits on one line (for readability).

> +# but not in $2
> +# $1: list
> +# $2: list

Tabs to separate, and a slightly more informative description of the
arguments.

> +list_diff() {
> +	__diff=
> +	for __e1 in ${1}; do
> +		__found=0
> +		for __e2 in ${2}; do
> +			[ ${__e1} = ${__e2} ] && __found=1
> +		done
> +		[ ${__found} -eq 0 ] && __diff="${__e1} ${__diff}"
> +	done
> +	printf '%s' "${__diff}"
> +}
> +
>  ################################################################################
>  
>  

-- 
Stefano