[pbuilder] 07/08: modules: add a helper function _contains() to check whether a value is in a given list

[Mattia Rizzolo]

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mattia pushed a commit to branch master
in repository pbuilder.

commit 389599957579326aaed9a6aad5221cc5cc3f0a7c
Author: Mattia Rizzolo <mattia at debian.org>
Date:   Wed Jun 22 11:58:49 2016 +0000

    modules: add a helper function _contains() to check whether a value is in a given list
    
    I copied this fuction years ago from who knows where, and since then I keep
    copying it around.  I know it would become really useful one day! :)
    
    Gbp-Dch: Ignore
---
 pbuilder-modules | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/pbuilder-modules b/pbuilder-modules
index e2bc2f4..5a941fa 100644
--- a/pbuilder-modules
+++ b/pbuilder-modules
@@ -137,6 +137,18 @@ log.d() {
     esac
 }
 
+# call like `_contains $list $value`, returns 0 if $value is in $list, 1 otherwise
+_contains() {
+    local n=$#
+    local value=${!n}
+    for ((i=1; i < $#; i++)) {
+        if [ "${!i}" == "${value}" ]; then
+            return 0
+        fi
+    }
+    return 1
+}
+
 # test whether a directory is empty
 # fails if "$*" exists but isn't a directory
 # fails and outputs garbage if "$*" doesn't actually exist

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