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# This hook ensures that we do the following in post-fixup:
# * wrap any installed executables with a wrapper that configures TCLLIBPATH
# * write a setup hook that extends the TCLLIBPATH of any anti-dependencies
# Add a directory to TCLLIBPATH, provided that it exists
_addToTclLibPath() {
local tclPkg="$1"
if [[ -z "$tclPkg" ]]; then
return
fi
if [[ ! -d "$tclPkg" ]]; then
>&2 echo "can't add $tclPkg to TCLLIBPATH; that directory doesn't exist"
exit 1
fi
if [[ "$tclPkg" == *" "* ]]; then
tclPkg="{$tclPkg}"
fi
if [[ -z "${TCLLIBPATH-}" ]]; then
export TCLLIBPATH="$tclPkg"
else
if [[ "$TCLLIBPATH" != *"$tclPkg "* && "$TCLLIBPATH" != *"$tclPkg" ]]; then
export TCLLIBPATH="${TCLLIBPATH} $tclPkg"
fi
fi
}
# Locate any directory containing an installed pkgIndex file
findInstalledTclPkgs() {
local -r newLibDir="${!outputLib}/lib"
if [[ ! -d "$newLibDir" ]]; then
>&2 echo "Assuming no loadable tcl packages installed ($newLibDir does not exist)"
return
fi
echo "$(find "$newLibDir" -name pkgIndex.tcl -exec dirname {} \;)"
}
# Wrap any freshly-installed binaries and set up their TCLLIBPATH
wrapTclBins() {
if [[ -z "${TCLLIBPATH-}" ]]; then
echo "skipping automatic Tcl binary wrapping (nothing to do)"
return
fi
local -r tclBinsDir="${!outputBin}/bin"
if [[ ! -d "$tclBinsDir" ]]; then
echo "No outputBin found, not using any TCLLIBPATH wrapper"
return
fi
find "$tclBinsDir" -type f -executable -print |
while read -r someBin; do
echo "Adding TCLLIBPATH wrapper for $someBin"
wrapProgram "$someBin" --prefix TCLLIBPATH ' ' "$TCLLIBPATH"
done
}
# Generate hook to adjust TCLLIBPATH in anti-dependencies
writeTclLibPathHook() {
local -r hookPath="${!outputLib}/nix-support/setup-hook"
mkdir -p "$(dirname "$hookPath")"
typeset -f _addToTclLibPath >> "$hookPath"
local -r tclPkgs=$(findInstalledTclPkgs)
while IFS= read -r tclPkg; do
echo "_addToTclLibPath \"$tclPkg\"" >> "$hookPath"
_addToTclLibPath "$tclPkg" true
done <<< "$tclPkgs"
}
postFixupHooks+=(writeTclLibPathHook)
postFixupHooks+=(wrapTclBins)
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