Mercurial > hg > mercurial-crew-with-dirclash

annotate hgmerge @ 1705:4b5725a4a0a6

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add changenav at bottom of page if one reads through the changelog and wants to go to the previous or next page one needs the navigation links at the bottom, not at the top of the page
author Johannes Stezenbach <js@linuxtv.org>
date Tue, 07 Feb 2006 23:01:11 -0600
parents 4ba8fe499df2
children 4eea6a747c27
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/bin/sh
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2 #
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3 # hgmerge - default merge helper for Mercurial
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4 #
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5 # This tries to find a way to do three-way merge on the current system.
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6 # The result ought to end up in $1.
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7
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8 set -e # bail out quickly on failure
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9
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10 LOCAL="$1"
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11 BASE="$2"
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12 OTHER="$3"
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13
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14 if [ -z "$EDITOR" ]; then
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15 EDITOR="vi"
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16 fi
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17
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18 # find decent versions of our utilities, insisting on the GNU versions where we
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19 # need to
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20 MERGE=merge
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21 DIFF3=gdiff3
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22 DIFF=gdiff
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23 PATCH=gpatch
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24
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25 type $MERGE >/dev/null 2>&1 || MERGE=
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26 type $DIFF3 >/dev/null 2>&1 || DIFF3=diff3
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27 type $DIFF >/dev/null 2>&1 || DIFF=diff
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28 type $PATCH >/dev/null 2>&1 || PATCH=patch
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29 $DIFF3 --version >/dev/null 2>&1 || DIFF3=
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30
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31 # find optional visual utilities
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32 FILEMERGE='/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge'
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33 KDIFF3=kdiff3
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34 TKDIFF=tkdiff
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35
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36 type $FILEMERGE >/dev/null 2>&1 || FILEMERGE=
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37 type $KDIFF3 >/dev/null 2>&1 || KDIFF3=
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38 type $TKDIFF >/dev/null 2>&1 || TKDIFF=
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39
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40 # random part of names
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41 RAND="$RANDOM.$RANDOM.$RANDOM.$$"
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42
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43 # temporary directory for diff+patch merge
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44 HGTMP="${TMPDIR-/tmp}/hgmerge.$RAND"
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45
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46 # backup file
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47 BACKUP="$LOCAL.orig.$RAND"
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48
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49 # file used to test for file change
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50 CHGTEST="$LOCAL.chg.$RAND"
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51
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52 # put all your required cleanup here
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53 cleanup() {
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54 rm -f "$BACKUP" "$CHGTEST"
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55 rm -rf "$HGTMP"
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56 }
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57
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58 # functions concerning program exit
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59 success() {
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60 cleanup
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61 exit 0
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62 }
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63
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64 failure() {
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65 echo "merge failed" 1>&2
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66 mv "$BACKUP" "$LOCAL"
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67 cleanup
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68 exit 1
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69 }
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70
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71 # Clean up when interrupted
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72 trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM
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73
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74 # Back up our file (and try hard to keep the mtime unchanged)
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75 mv "$LOCAL" "$BACKUP"
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76 cp "$BACKUP" "$LOCAL"
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78 # Attempt to do a non-interactive merge
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79 if [ -n "$MERGE" ]; then
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80 $MERGE "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && success
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81 cp "$BACKUP" "$LOCAL"
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82 elif [ -n "$DIFF3" ]; then
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83 echo $DIFF3 -m "$BACKUP" "$BASE" "$OTHER"
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84 $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" && success
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85 if [ $? -eq 2 ]; then
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86 echo "$DIFF3 failed! Exiting." 1>&2
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87 cp "$BACKUP" "$LOCAL"
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88 failure
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89 fi
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90 cp "$BACKUP" "$LOCAL"
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91 fi
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92
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93 # on MacOS X try FileMerge.app, shipped with Apple's developer tools
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94 if [ -n "$FILEMERGE" ]; then
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95 cp "$BACKUP" "$LOCAL"
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96 cp "$BACKUP" "$CHGTEST"
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97 # filemerge prefers the right by default
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98 $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL"
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99 [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure
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100 if test "$LOCAL" -nt "$CHGTEST"
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101 then
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102 success
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103 else
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104 echo "$LOCAL seems unchanged. Was the merge successful?"
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105 select answer in yes no
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106 do
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107 test "$answer" == "yes" && success || failure
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108 done
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109 fi
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110 failure
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111 fi
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112
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113 if [ -n "$DISPLAY" ]; then
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114 # try using kdiff3, which is fairly nice
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115 if [ -n "$KDIFF3" ]; then
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116 $KDIFF3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || failure
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117 success
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118 fi
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119
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120 # try using tkdiff, which is a bit less sophisticated
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121 if [ -n "$TKDIFF" ]; then
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122 $TKDIFF "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || failure
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123 success
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124 fi
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125 fi
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126
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127 # Attempt to do a merge with $EDITOR
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128 if [ -n "$MERGE" ]; then
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129 echo "conflicts detected in $LOCAL"
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130 $MERGE "$LOCAL" "$BASE" "$OTHER" 2>/dev/null || $EDITOR "$LOCAL"
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131 success
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132 fi
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133
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134 if [ -n "$DIFF3" ]; then
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135 echo "conflicts detected in $LOCAL"
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136 $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" || {
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137 case $? in
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138 1)
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139 $EDITOR "$LOCAL" ;;
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140 2) echo "$DIFF3 failed! Exiting." 1>&2
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141 cp "$BACKUP" "$LOCAL"
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142 failure ;;
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143 esac
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144 success
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145 }
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146 fi
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147
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148 # attempt to manually merge with diff and patch
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149 if [ -n "$DIFF" -a -n "$PATCH" ]; then
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150
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151 (umask 077 && mkdir "$HGTMP") || {
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152 echo "Could not create temporary directory $HGTMP" 1>&2
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153 failure
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154 }
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155
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156 $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || :
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157 if $PATCH "$LOCAL" < "$HGTMP/diff"; then
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158 success
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159 else
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160 # If rejects are empty after using the editor, merge was ok
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161 $EDITOR "$LOCAL" "$LOCAL.rej" && test -s "$LOCAL.rej" || success
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162 fi
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163 failure
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164 fi
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165
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166 echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!"
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167 failure