140 lines
5.4 KiB
Bash
140 lines
5.4 KiB
Bash
# Wrapper around wrapPythonProgramsIn, below. The $pythonPath
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# variable is passed in from the buildPythonPackage function.
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wrapPythonPrograms() {
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wrapPythonProgramsIn "$out/bin" "$out $pythonPath"
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}
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# Builds environment variables like PYTHONPATH and PATH walking through closure
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# of dependencies.
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buildPythonPath() {
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local pythonPath="$1"
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local path
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# Create an empty table of python paths (see doc on _addToPythonPath
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# for how this is used). Build up the program_PATH and program_PYTHONPATH
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# variables.
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declare -A pythonPathsSeen=()
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program_PYTHONPATH=
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program_PATH=
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pythonPathsSeen["@pythonHost@"]=1
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addToSearchPath program_PATH @pythonHost@/bin
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for path in $pythonPath; do
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_addToPythonPath $path
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done
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}
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# Patches a Python script so that it has correct libraries path and executable
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# name.
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patchPythonScript() {
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local f="$1"
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# The magicalSedExpression will invoke a "$(basename "$f")", so
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# if you change $f to something else, be sure to also change it
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# in pkgs/top-level/python-packages.nix!
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# It also uses $program_PYTHONPATH.
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sed -i "$f" -re '@magicalSedExpression@'
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}
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# Transforms any binaries generated by the setup.py script, replacing them
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# with an executable shell script which will set some environment variables
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# and then call into the original binary (which has been given a .wrapped
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# suffix).
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wrapPythonProgramsIn() {
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local dir="$1"
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local pythonPath="$2"
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local f
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buildPythonPath "$pythonPath"
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# Find all regular files in the output directory that are executable.
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if [ -d "$dir" ]; then
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find "$dir" -type f -perm -0100 -print0 | while read -d "" f; do
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# Rewrite "#! .../env python" to "#! /nix/store/.../python".
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# Strip suffix, like "3" or "2.7m" -- we don't have any choice on which
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# Python to use besides one with this hook anyway.
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if head -n1 "$f" | grep -q '#!.*/env.*\(python\|pypy\)'; then
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sed -i "$f" -e "1 s^.*/env[ ]*\(python\|pypy\)[^ ]*^#!@executable@^"
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fi
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if head -n1 "$f" | grep -q '#!.*'; then
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# Cross-compilation hack: ensure shebangs are for the host
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echo "Rewriting $(head -n 1 $f) to #!@pythonHost@"
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sed -i "$f" -e "1 s^#!@python@^#!@pythonHost@^"
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fi
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# catch /python and /.python-wrapped
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if head -n1 "$f" | grep -q '/\.\?\(python\|pypy\)'; then
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# dont wrap EGG-INFO scripts since they are called from python
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if echo "$f" | grep -qv EGG-INFO/scripts; then
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echo "wrapping \`$f'..."
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patchPythonScript "$f"
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# wrapProgram creates the executable shell script described
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# above. The script will set PYTHONPATH and PATH variables.!
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# (see pkgs/build-support/setup-hooks/make-wrapper.sh)
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local -a wrap_args=("$f"
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--prefix PATH ':' "$program_PATH"
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)
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if [ -z "$permitUserSite" ]; then
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wrap_args+=(--set PYTHONNOUSERSITE "true")
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fi
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# Add any additional arguments provided by makeWrapperArgs
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# argument to buildPythonPackage.
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# We need to support both the case when makeWrapperArgs
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# is an array and a IFS-separated string.
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# TODO: remove the string branch when __structuredAttrs are used.
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if [[ "${makeWrapperArgs+defined}" == "defined" && "$(declare -p makeWrapperArgs)" =~ ^'declare -a makeWrapperArgs=' ]]; then
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local -a user_args=("${makeWrapperArgs[@]}")
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else
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local -a user_args="(${makeWrapperArgs:-})"
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fi
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local -a wrapProgramArgs=("${wrap_args[@]}" "${user_args[@]}")
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wrapProgram "${wrapProgramArgs[@]}"
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fi
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fi
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done
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fi
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}
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# Adds the lib and bin directories to the PYTHONPATH and PATH variables,
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# respectively. Recurses on any paths declared in
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# `propagated-build-inputs`, while avoiding duplicating paths by
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# flagging the directories it has visited in `pythonPathsSeen`.
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_addToPythonPath() {
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local dir="$1"
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# Stop if we've already visited here.
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if [ -n "${pythonPathsSeen[$dir]}" ]; then return; fi
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pythonPathsSeen[$dir]=1
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# addToSearchPath is defined in stdenv/generic/setup.sh. It will have
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# the effect of calling `export program_X=$dir/...:$program_X`.
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addToSearchPath program_PYTHONPATH $dir/@sitePackages@
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addToSearchPath program_PATH $dir/bin
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# Inspect the propagated inputs (if they exist) and recur on them.
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local prop="$dir/nix-support/propagated-build-inputs"
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if [ -e $prop ]; then
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local new_path
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for new_path in $(cat $prop); do
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_addToPythonPath $new_path
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done
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fi
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}
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createBuildInputsPth() {
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local category="$1"
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local inputs="$2"
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if [ foo"$inputs" != foo ]; then
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for x in $inputs; do
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if $(echo -n $x |grep -q python-recursive-pth-loader); then
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continue
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fi
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if test -d "$x"/@sitePackages@; then
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echo $x/@sitePackages@ \
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>> "$out"/@sitePackages@/${name}-nix-python-$category.pth
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fi
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done
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fi
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}
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