add pacdep.sh

diff --git a/pacdep.sh b/pacdep.sh
new file mode 100755 (executable)
index 0000000..df6466e
--- /dev/null
+++ b/pacdep.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+# Pacman Dependency Tree
+# does NOT handle group names -> unexpected results.
+# Package names using aliases, like x-server, should work.
+# Breaks on circular dependencies -> you better hit ctrl-c.
+
+progname=`basename $0`
+pacexec=`which pacman`
+leafnull='None'
+branch=""
+vbranch="|   "
+vprune="    "
+hbranch="+---"
+
+_showdep () {
+
+    # Try to use specific pkg req
+    if $pacexec -Qi $1 &> /dev/null ; then
+         # Grab deps list|from "Depends"|Remove Tag | specific version req's.
+        deplist=`$pacexec -Qi $1|grep Depends|sed 's/^.*: |>[^ ]*//g;s/ $//'`
+    else # Oops! Failed on alias, try this...
+        deplist=`$pacexec -Qs $1 | sed '1!d;s/(^.*/)(.*)( .*$)/2/'`
+    fi
+
+    [ "x$deplist" = "x$leafnull" ] && return
+
+    while [ -n "$deplist" ]
+    do
+        set -- $deplist && echo "$branch$hbranch$1"
+        if [ $# -gt 1 ] ; then
+            branch=${branch}$vbranch
+        else
+            branch=${branch}$vprune
+        fi
+
+        _showdep $1
+
+        deplist=${*:2}
+        branch=${branch:0:${#branch}-${#vprune}}
+    done
+}
+
+branch=$vprune
+
+for pkg in `$pacexec -Q $1 | sed 's/ .*//'`
+do
+    echo $pkg
+    _showdep $pkg
+done
+
+unset _showdep && set --
+exit 0