payloads/external/tint/generate_core.sh

   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 #