Mercurial > hg > mercurial-crew-with-dirclash

annotate hgmerge @ 1822:64df4220b349

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copy/rename to a removed destination file When the destination of a copy or rename operation has been marked for removal, we need to restore it before we overwrite it with the new content. This also handles the case of idempotent renames, i.e. hg rename "a" "b" hg rename "b" "a"
author Robin Farine <robin.farine@terminus.org>
date Tue, 28 Feb 2006 23:47:40 -0800
parents d610fe0e6893
children 05c7d75be925
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 $DIFF3 --version >/dev/null 2>&1 || DIFF3=
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28 type "$DIFF" >/dev/null 2>&1 || DIFF="diff"
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29 type "$DIFF" >/dev/null 2>&1 || DIFF=
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30 type "$PATCH" >/dev/null 2>&1 || PATCH="patch"
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31 type "$PATCH" >/dev/null 2>&1 || PATCH=
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32
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33 # find optional visual utilities
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34 FILEMERGE="/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge"
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35 KDIFF3="kdiff3"
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36 TKDIFF="tkdiff"
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37 MELD="meld"
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38
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39 type "$FILEMERGE" >/dev/null 2>&1 || FILEMERGE=
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40 type "$KDIFF3" >/dev/null 2>&1 || KDIFF3=
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41 type "$TKDIFF" >/dev/null 2>&1 || TKDIFF=
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42 type "$MELD" >/dev/null 2>&1 || MELD=
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43
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44 # random part of names
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45 RAND="$RANDOM$RANDOM"
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46
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47 # temporary directory for diff+patch merge
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48 HGTMP="${TMPDIR-/tmp}/hgmerge.$RAND"
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49
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50 # backup file
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51 BACKUP="$LOCAL.orig.$RAND"
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52
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53 # file used to test for file change
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54 CHGTEST="$LOCAL.chg.$RAND"
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55
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56 # put all your required cleanup here
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57 cleanup() {
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58 rm -f "$BACKUP" "$CHGTEST"
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59 rm -rf "$HGTMP"
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60 }
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61
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62 # functions concerning program exit
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63 success() {
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64 cleanup
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65 exit 0
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66 }
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67
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68 failure() {
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69 echo "merge failed" 1>&2
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70 mv "$BACKUP" "$LOCAL"
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71 cleanup
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72 exit 1
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73 }
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74
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75 # Ask if the merge was successful
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76 ask_if_merged() {
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77 while true; do
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78 echo "$LOCAL seems unchanged."
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79 echo "Was the merge successful? [y/n]"
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80 read answer
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81 case "$answer" in
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82 y*|Y*) success;;
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83 n*|N*) failure;;
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84 esac
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85 done
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86 }
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87
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88 # Clean up when interrupted
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89 trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM
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90
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91 # Back up our file (and try hard to keep the mtime unchanged)
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92 mv "$LOCAL" "$BACKUP"
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93 cp "$BACKUP" "$LOCAL"
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94
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95 # Attempt to do a non-interactive merge
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96 if [ -n "$MERGE" -o -n "$DIFF3" ]; then
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97 if [ -n "$MERGE" ]; then
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98 $MERGE "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && success
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99 elif [ -n "$DIFF3" ]; then
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100 $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" && success
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101 fi
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102 if [ $? -gt 1 ]; then
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103 echo "automatic merge failed! Exiting." 1>&2
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104 failure
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105 fi
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106 fi
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107
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108 # on MacOS X try FileMerge.app, shipped with Apple's developer tools
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109 if [ -n "$FILEMERGE" ]; then
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110 cp "$BACKUP" "$LOCAL"
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111 cp "$BACKUP" "$CHGTEST"
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112 # filemerge prefers the right by default
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113 $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL"
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114 [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure
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115 test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged
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116 fi
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117
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118 if [ -n "$DISPLAY" ]; then
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119 # try using kdiff3, which is fairly nice
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120 if [ -n "$KDIFF3" ]; then
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121 $KDIFF3 --auto "$BASE" "$BACKUP" "$OTHER" -o "$LOCAL" || failure
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122 success
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123 fi
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124
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125 # try using tkdiff, which is a bit less sophisticated
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126 if [ -n "$TKDIFF" ]; then
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127 $TKDIFF "$BACKUP" "$OTHER" -a "$BASE" -o "$LOCAL" || failure
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128 success
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129 fi
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130
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131 if [ -n "$MELD" ]; then
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132 cp "$BACKUP" "$CHGTEST"
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133 # protect our feet - meld allows us to save to the left file
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134 cp "$BACKUP" "$LOCAL.tmp.$RAND"
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135 # Meld doesn't have automatic merging, so to reduce intervention
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136 # use the file with conflicts
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137 $MELD "$LOCAL.tmp.$RAND" "$LOCAL" "$OTHER" || failure
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138 # Also it doesn't return good error code
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139 test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged
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140 fi
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141 fi
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142
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143 # Attempt to do a merge with $EDITOR
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144 if [ -n "$MERGE" -o -n "$DIFF3" ]; then
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145 echo "conflicts detected in $LOCAL"
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146 cp "$BACKUP" "$CHGTEST"
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147 $EDITOR "$LOCAL" || failure
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148 # Some editors do not return meaningful error codes
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149 # Do not take any chances
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150 test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged
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151 fi
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152
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153 # attempt to manually merge with diff and patch
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154 if [ -n "$DIFF" -a -n "$PATCH" ]; then
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155
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156 (umask 077 && mkdir "$HGTMP") || {
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157 echo "Could not create temporary directory $HGTMP" 1>&2
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158 failure
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159 }
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160
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161 $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || :
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162 if $PATCH "$LOCAL" < "$HGTMP/diff"; then
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163 success
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164 else
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165 # If rejects are empty after using the editor, merge was ok
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166 $EDITOR "$LOCAL" "$LOCAL.rej" || failure
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167 test -s "$LOCAL.rej" || success
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168 fi
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169 failure
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170 fi
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171
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172 echo
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173 echo "hgmerge: unable to find any merge utility!"
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174 echo "supported programs:"
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175 echo "merge, FileMerge, tkdiff, kdiff3, meld, diff+patch"
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176 echo
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177 failure