merge_config.sh 4.4 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: $0 [OPTIONS] [CONFIG [...]]"
  29. echo " -h display this help text"
  30. echo " -m only merge the fragments, do not execute the make command"
  31. echo " -n use allnoconfig instead of alldefconfig"
  32. echo " -r list redundant entries when merging fragments"
  33. echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
  34. echo
  35. echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
  36. }
  37. RUNMAKE=true
  38. ALLTARGET=alldefconfig
  39. WARNREDUN=false
  40. OUTPUT=.
  41. CONFIG_PREFIX=${CONFIG_-CONFIG_}
  42. while true; do
  43. case $1 in
  44. "-n")
  45. ALLTARGET=allnoconfig
  46. shift
  47. continue
  48. ;;
  49. "-m")
  50. RUNMAKE=false
  51. shift
  52. continue
  53. ;;
  54. "-h")
  55. usage
  56. exit
  57. ;;
  58. "-r")
  59. WARNREDUN=true
  60. shift
  61. continue
  62. ;;
  63. "-O")
  64. if [ -d $2 ];then
  65. OUTPUT=$(echo $2 | sed 's/\/*$//')
  66. else
  67. echo "output directory $2 does not exist" 1>&2
  68. exit 1
  69. fi
  70. shift 2
  71. continue
  72. ;;
  73. *)
  74. break
  75. ;;
  76. esac
  77. done
  78. if [ "$#" -lt 1 ] ; then
  79. usage
  80. exit
  81. fi
  82. if [ -z "$KCONFIG_CONFIG" ]; then
  83. if [ "$OUTPUT" != . ]; then
  84. KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
  85. else
  86. KCONFIG_CONFIG=.config
  87. fi
  88. fi
  89. INITFILE=$1
  90. shift;
  91. if [ ! -r "$INITFILE" ]; then
  92. echo "The base file '$INITFILE' does not exist. Exit." >&2
  93. exit 1
  94. fi
  95. MERGE_LIST=$*
  96. SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p"
  97. SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p"
  98. TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
  99. echo "Using $INITFILE as base"
  100. cat $INITFILE > $TMP_FILE
  101. # Merge files, printing warnings on overridden values
  102. for MERGE_FILE in $MERGE_LIST ; do
  103. echo "Merging $MERGE_FILE"
  104. if [ ! -r "$MERGE_FILE" ]; then
  105. echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2
  106. exit 1
  107. fi
  108. CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)
  109. for CFG in $CFG_LIST ; do
  110. grep -q -w $CFG $TMP_FILE || continue
  111. PREV_VAL=$(grep -w $CFG $TMP_FILE)
  112. NEW_VAL=$(grep -w $CFG $MERGE_FILE)
  113. if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
  114. echo Value of $CFG is redefined by fragment $MERGE_FILE:
  115. echo Previous value: $PREV_VAL
  116. echo New value: $NEW_VAL
  117. echo
  118. elif [ "$WARNREDUN" = "true" ]; then
  119. echo Value of $CFG is redundant by fragment $MERGE_FILE:
  120. fi
  121. sed -i "/$CFG[ =]/d" $TMP_FILE
  122. done
  123. cat $MERGE_FILE >> $TMP_FILE
  124. done
  125. if [ "$RUNMAKE" = "false" ]; then
  126. cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
  127. echo "#"
  128. echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
  129. echo "#"
  130. clean_up
  131. exit
  132. fi
  133. # If we have an output dir, setup the O= argument, otherwise leave
  134. # it blank, since O=. will create an unnecessary ./source softlink
  135. OUTPUT_ARG=""
  136. if [ "$OUTPUT" != "." ] ; then
  137. OUTPUT_ARG="O=$OUTPUT"
  138. fi
  139. # Use the merged file as the starting point for:
  140. # alldefconfig: Fills in any missing symbols with Kconfig default
  141. # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
  142. make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
  143. # Check all specified config values took (might have missed-dependency issues)
  144. for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do
  145. REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
  146. ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG")
  147. if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
  148. echo "Value requested for $CFG not in final .config"
  149. echo "Requested value: $REQUESTED_VAL"
  150. echo "Actual value: $ACTUAL_VAL"
  151. echo ""
  152. fi
  153. done
  154. clean_up