nixpkgs/pkgs/development/python-modules/generic/wrap.sh

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wrapPythonPrograms() {
wrapPythonProgramsIn $out "$out $pythonPath"
}
wrapPythonProgramsIn() {
local dir="$1"
local pythonPath="$2"
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local python="@executable@"
local i
declare -A pythonPathsSeen=()
program_PYTHONPATH=
program_PATH=
for i in $pythonPath; do
_addToPythonPath $i
done
for i in $(find "$dir" -type f -perm +0100); do
# Rewrite "#! .../env python" to "#! /nix/store/.../python".
if head -n1 "$i" | grep -q '#!.*/env.*\(python\|pypy\)'; then
sed -i "$i" -e "1 s^.*/env[ ]*\(python\|pypy\)^#! $python^"
fi
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# catch /python and /.python-wrapped
if head -n1 "$i" | grep -q '/\.\?\(python\|pypy\)'; then
# dont wrap EGG-INFO scripts since they are called from python
if echo "$i" | grep -v EGG-INFO/scripts; then
echo "wrapping \`$i'..."
sed -i "$i" -re '1 {
/^#!/!b; :r
/\\$/{N;b r}
/__future__|^ *(#.*)?$/{n;b r}
/^ *[^# ]/i import sys; sys.argv[0] = '"'$(basename "$i")'"'
}'
wrapProgram "$i" \
--prefix PYTHONPATH ":" $program_PYTHONPATH \
--prefix PATH ":" $program_PATH
fi
fi
done
}
_addToPythonPath() {
local dir="$1"
if [ -n "${pythonPathsSeen[$dir]}" ]; then return; fi
pythonPathsSeen[$dir]=1
addToSearchPath program_PYTHONPATH $dir/lib/@libPrefix@/site-packages
addToSearchPath program_PATH $dir/bin
local prop="$dir/nix-support/propagated-native-build-inputs"
if [ -e $prop ]; then
local i
for i in $(cat $prop); do
_addToPythonPath $i
done
fi
}
createBuildInputsPth() {
local category="$1"
local inputs="$2"
if [ foo"$inputs" != foo ]; then
for x in $inputs; do
if $(echo -n $x |grep -q python-recursive-pth-loader); then
continue
fi
if test -d "$x"/lib/@libPrefix@/site-packages; then
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echo $x/lib/@libPrefix@/site-packages \
>> "$out"/lib/@libPrefix@/site-packages/${name}-nix-python-$category.pth
fi
done
fi
}