Bash completion support for SLV2 utilities from Lars Luthman.

git-svn-id: http://svn.drobilla.net/lad/trunk/slv2@2191 a436a847-0d15-0410-975c-d299462d15a1

2 files changed, 67 insertions, 0 deletions

diff --git a/utils/slv2.bash_completion b/utils/slv2.bash_completion
new file mode 100644
index 0000000..921087a
--- /dev/null
+++ b/utils/slv2.bash_completion
@@ -0,0 +1,59 @@
+# Bash auto-completion script written for lv2_inspect, lv2_jack_host
+# and lv2_simple_jack_host. Could be adapted to any other program
+# that takes an LV2 plugin URI as parameter.
+
+# Written by Lars Luthman <lars.luthman@gmail.com> on 2009-10-12. 
+# No copyright claimed for this script. Do what you want with it.
+
+# For some reason Bash splits the command line not only at whitespace
+# but also at ':' signs before putting the parts into COMP_WORDS.
+# Since ':' is used in all URIs, which are what we want to complete,
+# we have to put the URI back together before we can complete it
+# and then cut off the parts we prepended from the completions.
+# It probably breaks in some special cases but for most common uses
+# it should work fine.
+
+function _lv2_inspect() {
+    local uri cur opts w wn raw_reply len type
+    opts=`lv2_list | xargs -n1 echo -n " "`
+    
+    # This is the last "word", as split by Bash.
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    w="$cur"
+    
+    # Add the previous word while it or this one is a word break character
+    for i in `seq $(( $COMP_CWORD - 1 )) -1 1`; do
+	wn="${COMP_WORDS[i]}"
+	if expr "$COMP_WORDBREAKS" : ".*$wn" > /dev/null; then
+	    if expr "$COMP_WORDBREAKS" : ".*$w" > /dev/null; then
+		break
+	    fi
+	fi
+	w="$wn"
+	uri="$w$uri"
+    done
+    
+    # Check the length of the words we prepend
+    len=${#uri}
+    uri="$uri$cur"
+    raw_reply="$(compgen -W "${opts}" -- ${uri})"
+    
+    # If we are listing alternatives, just print the full URIs.
+    type=`echo $COMP_TYPE | awk '{ printf "%c", $1 }'`
+    if expr "?!@%" : ".*$type" > /dev/null; then
+	COMPREPLY=( $raw_reply )
+	return 0
+    fi
+    
+    # Otherwise, strip the prepended words from all completion suggestions.
+    COMPREPLY=()
+    for i in $raw_reply; do
+	COMPREPLY=( ${COMPREPLY[@]} ${i:len} )
+    done
+}
+
+complete -F _lv2_inspect lv2_inspect
+
+# And the same for lv2_jack_host and lv2_simple_jack_host.
+complete -F _lv2_inspect lv2_jack_host
+complete -F _lv2_inspect lv2_simple_jack_host
diff --git a/wscript b/wscript
index 4e45735..1c9eb71 100644
--- a/wscript
+++ b/wscript
@@ -46,6 +46,8 @@ def set_options(opt):
 			help="Build support for dynamic manifest extension [false]")
 	opt.add_option('--test', action='store_true', default=False, dest='build_tests',
 			help="Build unit tests")
+	opt.add_option('--bash-completion', action='store_true', default=False, dest='bash_completion',
+			help="Install bash completion script in /etc/bash_completion.d")
 
 def configure(conf):
 	autowaf.configure(conf)
@@ -61,6 +63,7 @@ def configure(conf):
 
 	conf.env['USE_JACK'] = conf.env['HAVE_JACK'] and not Options.options.no_jack
 	conf.env['BUILD_TESTS'] = Options.options.build_tests
+	conf.env['BASH_COMPLETION'] = Options.options.bash_completion
 
 	autowaf.print_summary(conf)
 	autowaf.display_header('SLV2 Configuration')
@@ -149,6 +152,11 @@ def build(bld):
 	bld.install_files('${MANDIR}/man3', blddir + '/default/doc/man/man3/*')
 	bld.install_files('${MANDIR}/man1', 'doc/*.1')
 
+	# Bash completion
+	if bld.env['BASH_COMPLETION']:
+		bld.install_as(
+			'/etc/bash_completion.d/slv2', 'utils/slv2.bash_completion')
+
 def shutdown():
 	autowaf.shutdown()