bash-dynamic-completion

3 files changed, 85 insertions, 0 deletions

diff --git a/pcr/bash-dynamic-completion/PKGBUILD b/pcr/bash-dynamic-completion/PKGBUILD
new file mode 100644
index 000000000..e2878f04c
--- /dev/null
+++ b/pcr/bash-dynamic-completion/PKGBUILD
@@ -0,0 +1,17 @@
+pkgname='bash-dynamic-completion'
+pkgver=1
+pkgrel=1
+pkgdesc="A simple script that automatically load any of those completion functions when it is requested for the first time"
+arch=( 'i686' 'x86_64' )
+url="http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=467231"
+license=( 'GPL' )
+depends=( 'bash' 'bash-completion' 'cron' )
+source=( 'dynamic_completion.sh' )
+md5sums=( 'b3659f84162ebda9e0444273b2d0bd8a' )
+install=dynamic_completion.install
+
+build() {
+	mkdir ${pkgdir}/etc
+	mkdir ${pkgdir}/etc/cron.monthly
+	cp ${srcdir}/dynamic_completion.sh ${pkgdir}/etc/cron.monthly/
+}
diff --git a/pcr/bash-dynamic-completion/dynamic_completion.install b/pcr/bash-dynamic-completion/dynamic_completion.install
new file mode 100644
index 000000000..bd2fb0c5b
--- /dev/null
+++ b/pcr/bash-dynamic-completion/dynamic_completion.install
@@ -0,0 +1,8 @@
+post_install() {
+	chmod 744 /etc/cron.monthly/dynamic_completion.sh
+	echo "Executing /etc/cron.monthly/dynamic_completion.sh"
+	/etc/cron.monthly/dynamic_completion.sh
+
+	echo "Please insert this line into /etc/bash.bashrc instead of calling /etc/bash_completion"
+	. /etc/bash_dyncompletion
+}
diff --git a/pcr/bash-dynamic-completion/dynamic_completion.sh b/pcr/bash-dynamic-completion/dynamic_completion.sh
new file mode 100644
index 000000000..bde058af4
--- /dev/null
+++ b/pcr/bash-dynamic-completion/dynamic_completion.sh
@@ -0,0 +1,60 @@
+#! /bin/sh
+
+#	This script automatically moves the completion
+#	functions from /etc/bash_completion and /etc/bash_completion.d 
+#	to a separate directory and creates a drop-in replacement for 
+#	/etc/bash_completion - which will load any of those completion
+#	functions when it is requested for the first time. By this, we
+#	greatly reduce the loading time (the replacement script is ~30kb)
+#	and also the memory footprint (as we rarely need every completion 
+#	function in every bash session).
+#
+#	The generator script is intended to be run once the base script
+#	/etc/bash_completion is installed and then, every time something 
+#	is added to /etc/bash_completion.d. I'd like to propose it for
+#	the bash package -- maybe as an optional part of installation.
+#
+#	Taken from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=467231
+#	Author: Andrei Paskevich
+#		andrei@capet.iut-fbleau.fr
+
+BASH_COMPLETION=/etc/bash_completion
+BASH_DYNCOMPLETION=/etc/bash_dyncompletion
+BASH_DYNCOMPLETION_DIR=/etc/bash_dyncompletion.d
+
+echo "Read static completions from $BASH_COMPLETION"
+. "$BASH_COMPLETION" || exit 1
+
+echo "Create dynamic completion file $BASH_DYNCOMPLETION"
+touch "$BASH_DYNCOMPLETION" || exit 1
+
+echo "Create dynamic completion directory $BASH_DYNCOMPLETION_DIR"
+mkdir -p "$BASH_DYNCOMPLETION_DIR" || exit 1
+
+echo -n "Populate dynamic completion directory:"
+FUNCS=$(declare -f | grep '^[a-zA-Z_][a-zA-Z0-9_]* () $' | cut -f 1 -d ' ')
+for FN in $FUNCS ; do
+    echo -n " $FN"
+    declare -f $FN > "$BASH_DYNCOMPLETION_DIR/$FN"
+    eval "$FN () { . '$BASH_DYNCOMPLETION_DIR/$FN' ; $FN \"\$@\" ; }"
+done
+echo
+
+echo "Write dynamic completion file $BASH_DYNCOMPLETION"
+exec > "$BASH_DYNCOMPLETION"
+cat <<EOF
+# $(basename $BASH_DYNCOMPLETION) - load-by-need bash completions
+# actual completion functions are stored in $BASH_DYNCOMPLETION_DIR
+# this file and directory are generated from $BASH_COMPLETION
+
+shopt -s extglob progcomp
+EOF
+
+declare -p BASH_COMPLETION 2>/dev/null
+declare -p bash205 2>/dev/null
+declare -p bash205b 2>/dev/null
+declare -p bash3 2>/dev/null
+declare -f
+complete -p
+
+exit 0