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patchShebangs: strip trailing whitespace

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Prior to this commit, trailing whitespace would be introduced when
modifying '#!' lines with no arguments.  For example (whitespace added):

    /nix/store/.../foo: interpreter directive changed
        from "/bin/bash"
          to "/nix/store/...-bash-4.3-p42/bin/bash  "

    /nix/store/.../bar: interpreter directive changed
        from "/bin/baz wef"
          to "/nix/store/...-baz wef "

We add a sed command to strip trailing whitespace, so the above commands
would drop the two spaces after "bash", or the one space after "baz wef".

abbradar: fixed commit title

Closes #16785.
This commit is contained in:
Cireo 2016-07-07 13:35:08 -07:00 committed by Nikolay Amiantov
parent 8b92103ae8
commit ff3e7d2b4b
1 changed files with 2 additions and 1 deletions
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3
pkgs/build-support/setup-hooks/patch-shebangs.sh
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@ -46,7 +46,8 @@ patchShebangs() {
args="$arg0 $args"
fi
newInterpreterLine="$newPath $args"
# Strip trailing whitespace introduced when no arguments are present
newInterpreterLine=$(echo "$newPath $args" | sed 's/[[:space:]]*$//')
if [ -n "$oldPath" -a "${oldPath:0:${#NIX_STORE}}" != "$NIX_STORE" ]; then
if [ -n "$newPath" -a "$newPath" != "$oldPath" ]; then