Mercurial > hg > mercurial-crew-with-dirclash
annotate hgmerge @ 1726:56fb048b102c
prefix hook env var names with HG_.
old names are still provided, but doc says they deprecated.
author | Vadim Gelfer <vadim.gelfer@gmail.com> |
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date | Thu, 16 Feb 2006 08:40:47 -0800 |
parents | 4ba8fe499df2 |
children | 4eea6a747c27 |
rev | line source |
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544
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1 #!/bin/sh |
240 | 2 # |
3 # hgmerge - default merge helper for Mercurial | |
4 # | |
5 # This tries to find a way to do three-way merge on the current system. | |
6 # The result ought to end up in $1. | |
7 | |
8 set -e # bail out quickly on failure | |
9 | |
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10 LOCAL="$1" |
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11 BASE="$2" |
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12 OTHER="$3" |
240 | 13 |
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14 if [ -z "$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" "$LOCAL" |
240 | 77 |
78 # Attempt to do a non-interactive merge | |
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79 if [ -n "$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" |
240 | 91 fi |
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 "$LOCAL" || failure |
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117 success |
240 | 118 fi |
119 | |
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120 # try using tkdiff, which is a bit less sophisticated |
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121 if [ -n "$TKDIFF" ]; then |
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122 $TKDIFF "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || failure |
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123 success |
240 | 124 fi |
125 fi | |
126 | |
127 # Attempt to do a merge with $EDITOR | |
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128 if [ -n "$MERGE" ]; then |
240 | 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 |
242 | 132 fi |
133 | |
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134 if [ -n "$DIFF3" ]; then |
242 | 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" "$LOCAL" |
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142 failure ;; |
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143 esac |
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144 success |
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145 } |
240 | 146 fi |
147 | |
148 # attempt to manually merge with diff and patch | |
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149 if [ -n "$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 |
240 | 162 fi |
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163 failure |
240 | 164 fi |
165 | |
166 echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!" | |
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167 failure |