merge_config.sh 4.6 KB

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  1. #!/bin/sh
  2. # merge_config.sh - Takes a list of config fragment values, and merges
  3. # them one by one. Provides warnings on overridden values, and specified
  4. # values that did not make it to the resulting .config file (due to missed
  5. # dependencies or config symbol removal).
  6. #
  7. # Portions reused from kconf_check and generate_cfg:
  8. # http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
  9. # http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
  10. #
  11. # Copyright (c) 2009-2010 Wind River Systems, Inc.
  12. # Copyright 2011 Linaro
  13. #
  14. # This program is free software; you can redistribute it and/or modify
  15. # it under the terms of the GNU General Public License version 2 as
  16. # published by the Free Software Foundation.
  17. #
  18. # This program is distributed in the hope that it will be useful,
  19. # but WITHOUT ANY WARRANTY; without even the implied warranty of
  20. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  21. # See the GNU General Public License for more details.
  22. clean_up() {
  23. rm -f $TMP_FILE
  24. exit
  25. }
  26. trap clean_up HUP INT TERM
  27. usage() {
  28. echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
  29. echo " -h display this help text"
  30. echo " -m only merge the fragments, do not execute the make command"
  31. echo " -n use allnoconfig instead of alldefconfig"
  32. echo " -r list redundant entries when merging fragments"
  33. echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
  34. echo " -e colon-separated list of br2-external trees to use (optional)"
  35. echo
  36. echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_
  37. environment variable."
  38. }
  39. RUNMAKE=true
  40. ALLTARGET=alldefconfig
  41. WARNREDUN=false
  42. OUTPUT=.
  43. CONFIG_PREFIX=${CONFIG_-CONFIG_}
  44. while true; do
  45. case $1 in
  46. "-n")
  47. ALLTARGET=allnoconfig
  48. shift
  49. continue
  50. ;;
  51. "-m")
  52. RUNMAKE=false
  53. shift
  54. continue
  55. ;;
  56. "-h")
  57. usage
  58. exit
  59. ;;
  60. "-r")
  61. WARNREDUN=true
  62. shift
  63. continue
  64. ;;
  65. "-O")
  66. if [ -d $2 ];then
  67. OUTPUT=$(echo $2 | sed 's/\/*$//')
  68. else
  69. echo "output directory $2 does not exist" 1>&2
  70. exit 1
  71. fi
  72. shift 2
  73. continue
  74. ;;
  75. "-e")
  76. EXTERNAL_ARG="BR2_EXTERNAL=$2"
  77. shift 2
  78. continue
  79. ;;
  80. *)
  81. break
  82. ;;
  83. esac
  84. done
  85. if [ "$#" -lt 1 ] ; then
  86. usage
  87. exit
  88. fi
  89. if [ -z "$KCONFIG_CONFIG" ]; then
  90. if [ "$OUTPUT" != . ]; then
  91. KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
  92. else
  93. KCONFIG_CONFIG=.config
  94. fi
  95. fi
  96. INITFILE=$1
  97. shift;
  98. if [ ! -r "$INITFILE" ]; then
  99. echo "The base file '$INITFILE' does not exist. Exit." >&2
  100. exit 1
  101. fi
  102. MERGE_LIST=$*
  103. SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p"
  104. SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p"
  105. TMP_FILE=$(mktemp -t .tmp.config.XXXXXXXXXX)
  106. echo "Using $INITFILE as base"
  107. cat $INITFILE > $TMP_FILE
  108. # Merge files, printing warnings on overridden values
  109. for MERGE_FILE in $MERGE_LIST ; do
  110. echo "Merging $MERGE_FILE"
  111. if [ ! -r "$MERGE_FILE" ]; then
  112. echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2
  113. exit 1
  114. fi
  115. CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)
  116. for CFG in $CFG_LIST ; do
  117. grep -q -w $CFG $TMP_FILE || continue
  118. PREV_VAL=$(grep -w $CFG $TMP_FILE)
  119. NEW_VAL=$(grep -w $CFG $MERGE_FILE)
  120. if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
  121. echo Value of $CFG is redefined by fragment $MERGE_FILE:
  122. echo Previous value: $PREV_VAL
  123. echo New value: $NEW_VAL
  124. echo
  125. elif [ "$WARNREDUN" = "true" ]; then
  126. echo Value of $CFG is redundant by fragment $MERGE_FILE:
  127. fi
  128. sed -i "/$CFG[ =]/d" $TMP_FILE
  129. done
  130. cat $MERGE_FILE >> $TMP_FILE
  131. done
  132. if [ "$RUNMAKE" = "false" ]; then
  133. cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
  134. echo "#"
  135. echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
  136. echo "#"
  137. clean_up
  138. exit
  139. fi
  140. # If we have an output dir, setup the O= argument, otherwise leave
  141. # it blank, since O=. will create an unnecessary ./source softlink
  142. OUTPUT_ARG=""
  143. if [ "$OUTPUT" != "." ] ; then
  144. OUTPUT_ARG="O=$OUTPUT"
  145. fi
  146. # Use the merged file as the starting point for:
  147. # alldefconfig: Fills in any missing symbols with Kconfig default
  148. # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
  149. make KCONFIG_ALLCONFIG=$TMP_FILE $EXTERNAL_ARG $OUTPUT_ARG $ALLTARGET
  150. # Check all specified config values took (might have missed-dependency issues)
  151. for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do
  152. REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
  153. ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG")
  154. if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
  155. echo "Value requested for $CFG not in final .config"
  156. echo "Requested value: $REQUESTED_VAL"
  157. echo "Actual value: $ACTUAL_VAL"
  158. echo ""
  159. fi
  160. done
  161. clean_up