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nixpkgs/pkgs/stdenv/cygwin/wrap-exes-to-find-dlls.sh
Florian Friesdorf 88e58a4fa2 cygwin: stdenv
2015-05-28 10:53:34 +02:00

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postFixupHooks+=(_cygwinWrapExesToFindDlls)
_cygwinWrapExesToFindDlls() {
find $out -type l | while read LINK; do
TARGET="$(readlink "${LINK}")"
# fix all non .exe links that link explicitly to a .exe
if [[ ${TARGET} == *.exe ]] && [[ ${LINK} != *.exe ]]; then
mv "${LINK}" "${LINK}.exe"
LINK="${LINK}.exe"
fi
# generate complementary filenames
if [[ ${LINK} == *.exe ]]; then
_LINK="${LINK%.exe}"
_TARGET="${TARGET%.exe}"
else
_LINK="${LINK}.exe"
_TARGET="${TARGET}.exe"
fi
# check if sould create complementary link
DOLINK=1
if [[ ${_TARGET} == *.exe ]]; then
# the canonical target has to be a .exe
CTARGET="$(readlink -f "${LINK}")"
if [[ ${CTARGET} != *.exe ]]; then
CTARGET="${CTARGET}.exe"
fi
if [ ! -e "${CTARGET}" ]; then
unset DOLINK
fi
fi
if [ -e "${_LINK}" ]; then
# complementary link seems to exist
# but could be cygwin smoke and mirrors
INO=$(stat -c%i "${LINK}")
_INO=$(stat -c%i "${_LINK}")
if [ "${INO}" -ne "${_INO}" ]; then
unset DOLINK
fi
fi
# create complementary link
if [ -n "${DOLINK}" ]; then
ln -s "${_TARGET}" "${_LINK}.tmp"
mv "${_LINK}.tmp" "${_LINK}"
fi
done
find $out -type f -name "*.exe" | while read EXE; do
WRAPPER="${EXE%.exe}"
if [ -e "${WRAPPER}" ]; then
# check if really exists or cygwin smoke and mirrors
INO=$(stat -c%i "${EXE}")
_INO=$(stat -c%i "${WRAPPER}")
if [ "${INO}" -ne "${_INO}" ]; then
continue
fi
fi
mv "${EXE}" "${EXE}.tmp"
cat >"${WRAPPER}" <<EOF
#!/bin/sh
export PATH=$_PATH${_PATH:+:}\${PATH}
exec "\$0.exe" "\$@"
EOF
chmod +x "${WRAPPER}"
mv "${EXE}.tmp" "${EXE}"
done
}