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patch-shebangs: use isScript to safely check for shebang start

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Fixes commonly encountered errors about broken pipes or null-bytes in
command-substitution.
This commit is contained in:
Will Dietz 2018-09-27 17:40:16 -05:00
parent f66ae2c8b2
commit 830f9fabd4
1 changed files with 2 additions and 3 deletions
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5
pkgs/build-support/setup-hooks/patch-shebangs.sh
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@ -19,9 +19,8 @@ patchShebangs() {
local newInterpreterLine local newInterpreterLine
find "$dir" -type f -perm -0100 | while read f; do find "$dir" -type f -perm -0100 | while read f; do
if [ "$(head -1 "$f" | head -c+2)" != '#!' ]; then if ! isScript "$f"; then
# missing shebang => not a script continue
continue
fi fi
oldInterpreterLine=$(head -1 "$f" | tail -c+3) oldInterpreterLine=$(head -1 "$f" | tail -c+3)