52 lines
2.0 KiB
Bash
52 lines
2.0 KiB
Bash
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# This is a slightly modified version of nix's default patchShebangs
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dir="$1"
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echo "patching sage internal script interpreter paths in $( readlink -f "$dir")"
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find "$dir" -type f -perm -0100 | while read f; do
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if [ "$(head -1 "$f" | head -c+2)" != '#!' ]; then
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# missing shebang => not a script
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continue
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fi
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oldInterpreterLine=$(head -1 "$f" | tail -c+3)
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read -r oldPath arg0 args <<< "$oldInterpreterLine"
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if $(echo "$oldPath" | grep -q "/bin/env$"); then
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# Check for unsupported 'env' functionality:
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# - options: something starting with a '-'
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# - environment variables: foo=bar
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if $(echo "$arg0" | grep -q -- "^-.*\|.*=.*"); then
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echo "unsupported interpreter directive \"$oldInterpreterLine\" (set dontPatchShebangs=1 and handle shebang patching yourself)"
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exit 1
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fi
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executable="$arg0"
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else
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if [ "$oldPath" = "" ]; then
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# If no interpreter is specified linux will use /bin/sh. Set
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# oldpath="/bin/sh" so that we get /nix/store/.../sh.
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oldPath="/bin/sh"
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fi
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executable="$(basename "$oldPath")"
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args="$arg0 $args"
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fi
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newPath="$(echo "$out/bin/$executable $args" | sed 's/[[:space:]]*$//')"
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if [[ ! -x "$newPath" ]] ; then
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newPath="$(command -v "$executable" || true)"
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fi
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# Strip trailing whitespace introduced when no arguments are present
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newInterpreterLine="$(echo "$newPath $args" | sed 's/[[:space:]]*$//')"
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if [ -n "$oldPath" -a "${oldPath:0:${#NIX_STORE}}" != "$NIX_STORE" ]; then
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if [ -n "$newPath" -a "$newPath" != "$oldPath" ]; then
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echo "$f: sage interpreter directive changed from \"$oldInterpreterLine\" to \"$newInterpreterLine\""
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# escape the escape chars so that sed doesn't interpret them
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escapedInterpreterLine=$(echo "$newInterpreterLine" | sed 's|\\|\\\\|g')
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sed -i -e "1 s|.*|#\!$escapedInterpreterLine|" "$f"
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fi
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fi
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done
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