kiss: Add function to pop list itemS

kiss

@@ -69,6 +69,15 @@ esc() {
         "$(printf %s "$2" | sed 's/[\/&]/\\&/g')"
 }
 
+pop() {
+    # Remove an item from a "string list". This allows us
+    # to remove a 'sed' call and reuse this code throughout.
+    del=$1
+    shift "$(($# ? 1 : 0))"
+
+    for i; do [ "$i" = "$del" ] || printf %s " $i "; done
+}
+
 pkg_lint() {
     # Check that each mandatory file in the package entry exists.
     log "$1" "Checking repository files"
@@ -495,11 +504,9 @@ pkg_build() {
     # If an explicit package is a dependency of another explicit
     # package, remove it from the explicit list as it needs to be
     # installed as a dependency.
+    # shellcheck disable=2086
     for pkg; do
-        # There's no better way to remove a word from a string in
-        # POSIX 'sh' sadly.
-        contains "$deps" "$pkg" &&
-            explicit=$(printf %s "$explicit" | sed "s/ $pkg / /g")
+        contains "$deps" "$pkg" && explicit=$(pop "$pkg" $explicit)
     done
 
     # See [1] at top of script.
@@ -534,7 +541,7 @@ pkg_build() {
                 # list. No better way than using 'sed' in POSIX 'sh'.
                 # See [1] at top of script.
                 # shellcheck disable=2046,2086
-                set -- $(printf %s " $* " | sed "s/ $pkg / /")
+                set -- $(pop "$pkg" "$@")
             }
         }
     done
@@ -706,22 +713,10 @@ pkg_conflicts() {
 
     p_name=$2
 
-    # Generate a list of all installed package manifests.
-    set +f
-    set -f -- "$sys_db"/*/manifest
-
-    # Filter the manifest list and remove the previously
-    # installed version of the package if it exists.
-    for pkg; do
-        i_name=${pkg%/*}
-        i_name=${i_name##*/}
-
-        shift "$(($# ? 1 : 0))"
-
-        [ "$p_name" = "$i_name" ] && continue
-
-        set -- "$@" "$pkg"
-    done
+    # Generate a list of all installed package manifests
+    # and remove the current package from the list.
+    # shellcheck disable=2046,2086
+    set -- $(set +f; pop "$sys_db/$p_name/manifest" "$sys_db"/*/manifest)
 
     [ -s "$cac_dir/$pid-m" ] || return 0