Apply runtime shebanging to POSIX shell

1 files changed, 31 insertions, 0 deletions

diff --git a/bin/dub.sh b/bin/dub.sh
new file mode 100644
index 00000000..f42c5ac9
--- /dev/null
+++ b/bin/dub.sh
@@ -0,0 +1,31 @@
+# List the biggest files in a directory
+
+# First optional argument is the directory, defaulting to the
+# current dir; second optional argument is the number of files to
+# show, defaulting to 20
+dir=${1:-.} lines=${2:-10}
+
+# Enter the target dir or bail
+cd -- "$dir" || exit
+
+# Add files matching glob, shift them off if unexpanded (first and
+# only entry doesn't exist)
+set -- *
+[ -e "$1" ] || shift
+
+# Add dot files, shift off the "." and ".." entries (sh(1)
+# implementations seem to vary on whether they include these)
+set -- .* "$@"
+[ -e "$1" ] || shift
+[ "$1" = . ] && shift
+[ "$1" = .. ] && shift
+
+# Run du(1) with POSIX compatible flags -k for kilobyte unit and
+# -s for total over the arguments
+du -ks -- "$@" |
+
+# Sort the first field (the sizes) numerically, in reverse
+sort -k1,1nr |
+
+# Limit the output to the given number of lines
+sed "$lines"q