1  #!/bin/sh
  2  #
  3  # generate_core.sh extracts the core part from buildgcc script,
  4  # most importantly the checksum calculation/verification functions.
  5  #
  6  # Copyright (C) 2019 Mike Banon <mikebdp2@gmail.com>
  7  #
  8  ##############################################################################
  9  #
 10  # USAGE:
 11  # 	./generate_core.sh <buildgcc> <corescript> prepare_before_patch
 12  # where
 13  # 	buildgcc   - path to input buildgcc script
 14  # 	corescript - path to output core part script
 15  # 	prepare_before_patch - optional argument to insert prepare_${package}
 16  # 				call into the unpack_and_patch function, e.g.
 17  # 				for removing some files with rm command
 18  # 				in order to reduce the size of patch file
 19  #
 20  ##############################################################################
 21  
 22  buildgcc="$1"
 23  corescript="$2"
 24  prepare_before_patch="$3"
 25  
 26  #
 27  # Imports the source file fragment between start and end into the
 28  # destination file, optionally excluding the last line if not needed
 29  #
 30  
 31  import_from_file() {
 32          source="$1"
 33          destination="$2"
 34  	start="$3"
 35  	end="$4"
 36  	last_line_disabled="$5"
 37  	if [ -z "${last_line_disabled}" ] ; then
 38  		sed -n "/^${start}/,/^${end}/{/^${start}/{p;n};{p}}" "$source" >> "$destination"
 39  	else
 40  		sed -n "/^${start}/,/^${end}/{/^${start}/{p;n};/^${end}/{q};{p}}" "$source" >> "$destination"
 41  	fi
 42  }
 43  
 44  #
 45  # Import the color defines together with UNAME/HALT_FOR_TOOLS variables
 46  #
 47  
 48  import_from_file "$buildgcc" "$corescript" "red=" "HALT_FOR_TOOLS=0" || exit "$?"
 49  
 50  #
 51  # Import the core functions
 52  #
 53  
 54  FUNCTIONS="please_install searchtool download compute_hash error_hash_mismatch verify_hash unpack_and_patch"
 55  
 56  for F in $FUNCTIONS ; do
 57  	import_from_file "$buildgcc" "$corescript" "$F()" "}" || exit "$?"
 58  done
 59  
 60  #
 61  # Import a fragment where we find tar/patch/make and other essential tools
 62  #
 63  
 64  import_from_file "$buildgcc" "$corescript" "# Find all the required tools" "# Allow" "last_line_disabled" || exit "$?"
 65  
 66  #
 67  # Import a fragment with conditional exit if some required tools were not found
 68  #
 69  
 70  import_from_file "$buildgcc" "$corescript" "if \[ \"\$HALT_FOR_TOOLS" "fi" || exit "$?"
 71  
 72  #
 73  # Avoid the unnecessary subdirectories holding a single file each
 74  #
 75  
 76  sed -i -e "s/patches\///g" "$corescript"
 77  sed -i -e "s/sum\///g" "$corescript"
 78  sed -i -e "s/tarballs\///g" "$corescript"
 79  sed -i -e "s/cd tarballs || exit 1//g" "$corescript"
 80  sed -i -e "s/cd \.\.//g" "$corescript"
 81  
 82  #
 83  # Get the known checksum without using a dedicated single-line file
 84  #
 85  
 86  sed -i -e "s/\tknown_hash=\"\$(get_known_hash.*/\tknown_hash=\"\$2\"/g" "$corescript"
 87  
 88  #
 89  # Update the paths printed at the error messages
 90  #
 91  
 92  sed -i -e "s/util\/crossgcc\///g" "$corescript"
 93  
 94  #
 95  # Insert prepare_${package} function call between the unpack and patch operations
 96  #
 97  
 98  if [ ! -z "${prepare_before_patch}" ] ; then
 99  	sed -i -e "/\$TAR \$FLAGS \"\$(basename \"\$archive\")\"/a prepare_\${package} || exit \"\$?\"" "$corescript"
100  	sed -i -e "/\$TAR \$FLAGS \"\$archive\"/a prepare_\${package} || exit \"\$?\"" "$corescript"
101  fi
102  
103  #