gather_windows_local_dll_dependencies.sh

#! /bin/bash

#
# Script to collect Windows dependent dynamic libraries.
# Run under a Cygwin or Windows Subsystem for Linux bash shell.
#
# Author(s): Philip Lamb
#

# Get our location.
OURDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

function usage {
    echo "Usage: $(basename $0) [-v|--verbose] [--debug] path_to_dll [path_to_dll2 ...]"
    exit 1
}

# -e = exit on errors
set -e
# -x = debug
#set -x

# Parse parameters
while test $# -gt 0
do
    case "$1" in
        --help) usage
            ;;
        -h) usage
            ;;
        --debug) DEBUG=
            ;;
        --verbose) VERBOSE=1
            ;;
        -v) VERBOSE=1
            ;;
        --*) echo "bad option $1"
            usage
            ;;
        *) TARGETS="$TARGETS $1"
            ;;
    esac
    shift
done
if [ -z "$TARGETS" ]; then
    echo "No target dll(s) specified."
    exit 1;
fi

IGNORE_LIBS='\
KERNEL32.dll \
USER32.dll \
SHELL32.dll \
ADVAPI32.dll \
WINMM.dll \
WS2_32.dll \
DNSAPI.dll \
IPHLPAPI.DLL \
ole32.dll \
d3d11.dll \
D3DCOMPILER_47.dll \
dbghelp.dll \
d3d9.dll \
bcrypt.dll \
api-ms-win-crt-string-l1-1-0.dll \
api-ms-win-crt-heap-l1-1-0.dll \
api-ms-win-crt-stdio-l1-1-0.dll \
api-ms-win-crt-time-l1-1-0.dll \
api-ms-win-crt-math-l1-1-0.dll \
api-ms-win-crt-convert-l1-1-0.dll \
api-ms-win-crt-utility-l1-1-0.dll \
api-ms-win-crt-environment-l1-1-0.dll \
api-ms-win-crt-locale-l1-1-0.dll \
api-ms-win-crt-filesystem-l1-1-0.dll \
api-ms-win-crt-process-l1-1-0.dll \
api-ms-win-crt-conio-l1-1-0.dll \
api-ms-win-crt-runtime-l1-1-0.dll \
'
for ((i = 1; i <= $(echo -n $TARGETS | wc -w) ; i++)); do
    target=$(echo -n $TARGETS | cut -d' ' -f$i)
    deps_raw=$(objdump -p $target | grep "DLL Name: " | cut -d' ' -f3)
    while IFS= read -r line; do
        dep=$(echo -n $line)

        # Don't bother if it's an ignored lib.
        for ignore_lib in $IGNORE_LIBS
        do
            if [[ $dep == $ignore_lib ]]; then
                continue 2;
            fi
        done
        
        # We didn't match any of the system prefixes, so it's a user lib
        # but is it already in the list of processed deps?
        if ! [[ " $TARGETS " =~ " $dep " ]]; then
            # Append to deps list if unique.
            TARGETS="$TARGETS $dep"
        fi
    done <<< "$deps_raw"
done

echo $TARGETS