pkgs/stdenv/cygwin/wrap-exes-to-find-dlls.sh

   1 postFixupHooks+=(_cygwinWrapExesToFindDlls)
   2
   3 _cygwinWrapExesToFindDlls() {
   4     find $out -type l | while read LINK; do
   5         TARGET="$(readlink "${LINK}")"
   6
   7         # fix all non .exe links that link explicitly to a .exe
   8         if [[ ${TARGET} == *.exe ]] && [[ ${LINK} != *.exe ]]; then
   9             mv "${LINK}" "${LINK}.exe"
  10             LINK="${LINK}.exe"
  11         fi
  12
  13         # generate complementary filenames
  14         if [[ ${LINK} == *.exe ]]; then
  15             _LINK="${LINK%.exe}"
  16             _TARGET="${TARGET%.exe}"
  17         else
  18             _LINK="${LINK}.exe"
  19             _TARGET="${TARGET}.exe"
  20         fi
  21
  22         # check if sould create complementary link
  23         DOLINK=1
  24         if [[ ${_TARGET} == *.exe ]]; then
  25             # the canonical target has to be a .exe
  26             CTARGET="$(readlink -f "${LINK}")"
  27             if [[ ${CTARGET} != *.exe ]]; then
  28                 CTARGET="${CTARGET}.exe"
  29             fi
  30
  31             if [ ! -e "${CTARGET}" ]; then
  32                 unset DOLINK
  33             fi
  34         fi
  35
  36         if [ -e "${_LINK}" ]; then
  37             # complementary link seems to exist
  38             # but could be cygwin smoke and mirrors
  39             INO=$(stat -c%i "${LINK}")
  40             _INO=$(stat -c%i "${_LINK}")
  41             if [ "${INO}" -ne "${_INO}" ]; then
  42                 unset DOLINK
  43             fi
  44         fi
  45
  46         # create complementary link
  47         if [ -n "${DOLINK}" ]; then
  48             ln -s "${_TARGET}" "${_LINK}.tmp"
  49             mv "${_LINK}.tmp" "${_LINK}"
  50         fi
  51     done
  52
  53     find $out -type f -name "*.exe" | while read EXE; do
  54         WRAPPER="${EXE%.exe}"
  55         if [ -e "${WRAPPER}" ]; then
  56             # check if really exists or cygwin smoke and mirrors
  57             INO=$(stat -c%i "${EXE}")
  58             _INO=$(stat -c%i "${WRAPPER}")
  59             if [ "${INO}" -ne "${_INO}" ]; then
  60                 continue
  61             fi
  62         fi
  63
  64         mv "${EXE}" "${EXE}.tmp"
  65
  66         cat >"${WRAPPER}" <<EOF
  67 #!/bin/sh
  68 export PATH=$_PATH${_PATH:+:}\${PATH}
  69 exec "\$0.exe" "\$@"
  70 EOF
  71         chmod +x "${WRAPPER}"
  72         mv "${EXE}.tmp" "${EXE}"
  73     done
  74 }