<h2>Editing File: /lib/rpm/redhat/brp-mangle-shebangs</h2><form method='post'><textarea name='content' class='file-edit'>#!/bin/bash

# If using normal root, avoid changing anything.
if [ -z &quot;$RPM_BUILD_ROOT&quot; -o &quot;$RPM_BUILD_ROOT&quot; = &quot;/&quot; ]; then
  exit 0
fi

exclude_files=&quot;&quot;
exclude_files_from=&quot;&quot;
exclude_shebangs=&quot;&quot;
exclude_shebangs_from=&quot;&quot;

usage() {
  local verbose=$1 &amp;&amp; shift
  local outfile=$1 &amp;&amp; shift
  local status=$1 &amp;&amp; shift

  (
    echo 'usage: brp-mangle-shebangs [--files &lt;regexp&gt;] [--files-from &lt;file&gt;] [--shebangs &lt;regexp&gt;] [--shebangs-from &lt;file&gt;]'
    if [ &quot;${verbose}&quot; == &quot;yes&quot; ]; then
      echo '  --files: extended regexp of files to ignore'
      echo '  --files-from: file containing a list of extended regexps of files to ignore'
      echo '  --shebangs: extended regexp of shebangs to ignore'
      echo '  --shebangs-from: file containing a list of extended regexps of shebangs to ignore'
    fi
  ) &gt;&gt;${outfile}
  exit ${status}
}

while [ $# -gt 0 ] ; do
  case &quot;$1&quot; in
    --files)
      exclude_files=&quot;${2}&quot;
      shift
      ;;
    --files=*)
      exclude_files=&quot;${1##--files=}&quot;
      ;;
    --files-from)
      exclude_files_from=&quot;${2}&quot;
      shift
      ;;
    --files-from=*)
      exclude_files_from=&quot;${1##--files-from=}&quot;
      ;;
    --shebangs)
      exclude_shebangs=&quot;${2}&quot;
      shift
      ;;
    --shebangs=*)
      exclude_shebangs=&quot;${1##--shebangs=}&quot;
      ;;
    --shebangs-from)
      exclude_shebangs_from=&quot;${2}&quot;
      shift
      ;;
    --shebangs-from=*)
      exclude_shebangs_from=&quot;${1##--shebangs-from=}&quot;
      ;;
    --help|--usage|&quot;-?&quot;|-h)
      usage yes /dev/stdout 0
      ;;
    *)
      echo &quot;Unknown option \&quot;${1}\&quot;&quot; 1&gt;&amp;2
      usage no /dev/stderr 1
      ;;
  esac
  shift
done

cd &quot;$RPM_BUILD_ROOT&quot;

# Large packages such as kernel can have thousands of executable files.
# We take care to not fork/exec thousands of &quot;file&quot;s and &quot;grep&quot;s,
# but run just two of them.
# (Take care to exclude filenames which would mangle &quot;file&quot; output).
find -executable -type f ! -path '*:*' ! -path $'*\n*' \
| file -N --mime-type -f - \
| grep -P &quot;.+(?=: text/)&quot; \
| {
fail=0
while IFS= read -r line; do
  f=${line%%:*}

  # Remove the dot
  path=&quot;${f#.}&quot;

  if [ -n &quot;$exclude_files&quot; ]; then
    echo &quot;$path&quot; | grep -q -E &quot;$exclude_files&quot; &amp;&amp; continue
  fi
  if [ -n &quot;$exclude_files_from&quot; ]; then
    echo &quot;$path&quot; | grep -q -E -f &quot;$exclude_files_from&quot; &amp;&amp; continue
  fi


  if ! read shebang_line &lt; &quot;$f&quot;; then
    echo &gt;&amp;2 &quot;*** WARNING: Cannot read the first line from $f, removing executable bit&quot;
    ts=$(stat -c %y &quot;$f&quot;)
    chmod -x &quot;$f&quot;
    touch -d &quot;$ts&quot; &quot;$f&quot;
    continue
  fi

  orig_shebang=&quot;${shebang_line#\#!}&quot;
  if [ &quot;$orig_shebang&quot; = &quot;$shebang_line&quot; ]; then
    echo &gt;&amp;2 &quot;*** WARNING: $f is executable but has no shebang, removing executable bit&quot;
    ts=$(stat -c %y &quot;$f&quot;)
    chmod -x &quot;$f&quot;
    touch -d &quot;$ts&quot; &quot;$f&quot;
    continue
  fi

  # Trim spaces
  while shebang=&quot;${orig_shebang//  / }&quot;; [ &quot;$shebang&quot; != &quot;$orig_shebang&quot; ]; do
    orig_shebang=&quot;$shebang&quot;
  done
  # Treat &quot;#! /path/to &quot; as &quot;#!/path/to&quot;
  orig_shebang=&quot;${orig_shebang# }&quot;

  shebang=&quot;$orig_shebang&quot;

  if [ -z &quot;$shebang&quot; ]; then
    echo &gt;&amp;2 &quot;*** WARNING: $f is executable but has empty shebang, removing executable bit&quot;
    ts=$(stat -c %y &quot;$f&quot;)
    chmod -x &quot;$f&quot;
    touch -d &quot;$ts&quot; &quot;$f&quot;
    continue
  fi
  if [ -n &quot;${shebang##/*}&quot; ]; then
    echo &gt;&amp;2 &quot;*** ERROR: $f has shebang which doesn't start with '/' ($shebang)&quot;
    fail=1
    continue
  fi

  if ! { echo &quot;$shebang&quot; | grep -q -P &quot;^/(?:usr/)?(?:bin|sbin)/&quot;; }; then
    continue
  fi

  # Replace &quot;special&quot; env shebang:
  # /whatsoever/env /whatever/foo → /whatever/foo
  shebang=$(echo &quot;$shebang&quot; | sed -r -e 's@^(.+)/env /(.+)$@/\2@')
  # /whatsoever/env foo → /whatsoever/foo
  shebang=$(echo &quot;$shebang&quot; | sed -r -e 's@^(.+/)env (.+)$@\1\2@')

  # Replace python3 with the desired Python 3 shebang,
  # if passed as an non-empty environment variable PYTHON3
  if [ -n &quot;${PYTHON3:+x}&quot; ]; then
    shebang=$(echo &quot;$shebang&quot; | sed -r -e &quot;s@/usr/bin/python3(\s|$)@${PYTHON3}\1@&quot;)
  fi

  # Replace ambiguous python with python2
  py_shebang=$(echo &quot;$shebang&quot; | sed -r -e 's@/usr/bin/python(\s|$)@/usr/bin/python2\1@')

  if [ &quot;$shebang&quot; != &quot;$py_shebang&quot; ]; then
    echo &gt;&amp;2 &quot;*** ERROR: ambiguous python shebang in $path: #!$orig_shebang. Change it to python3 (or python2) explicitly.&quot;
    fail=1
  elif [ &quot;#!$shebang&quot; != &quot;#!$orig_shebang&quot; ]; then
    echo &quot;mangling shebang in $path from $orig_shebang to #!$shebang&quot;
    ts=$(stat -c %y &quot;$f&quot;)
    sed -i -e &quot;1c #!$shebang&quot; &quot;$f&quot;
    touch -d &quot;$ts&quot; &quot;$f&quot;
  fi

done

exit $fail
}
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