Mercurial > hg
annotate hgmerge @ 5757:c5793dada959
Clarify some messages during commit:
- use "branch 'foo'" to distinguish from "branch merge".
- commit messags can be empty (to abort commits)
- Added value for editor message: Tell about HG: lines like CVS does.
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Dec 2007 17:10:25 +0100 |
parents | 3c80ecdc1bcd |
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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. | |
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6 # The result ought to end up in $1. Script is run in root directory of |
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7 # repository. |
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8 # |
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9 # Environment variables set by Mercurial: |
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10 # HG_FILE name of file within repo |
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11 # HG_MY_NODE revision being merged |
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12 # HG_OTHER_NODE revision being merged |
240 | 13 |
14 set -e # bail out quickly on failure | |
15 | |
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16 LOCAL="$1" |
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17 BASE="$2" |
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18 OTHER="$3" |
240 | 19 |
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20 if [ -n "$VISUAL" ]; then |
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21 EDIT_PROG="$VISUAL" |
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22 elif [ -n "$EDITOR" ]; then |
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23 EDIT_PROG="$EDITOR" |
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24 else |
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25 EDIT_PROG="vi" |
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26 fi |
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27 |
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28 # find decent versions of our utilities, insisting on the GNU versions where we |
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29 # need to |
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30 MERGE="merge" |
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31 DIFF3="gdiff3" |
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32 DIFF="gdiff" |
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33 PATCH="gpatch" |
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34 |
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35 type "$MERGE" >/dev/null 2>&1 || MERGE= |
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36 type "$DIFF3" >/dev/null 2>&1 || DIFF3="diff3" |
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37 $DIFF3 --version >/dev/null 2>&1 || DIFF3= |
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38 type "$DIFF" >/dev/null 2>&1 || DIFF="diff" |
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39 type "$DIFF" >/dev/null 2>&1 || DIFF= |
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40 type "$PATCH" >/dev/null 2>&1 || PATCH="patch" |
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41 type "$PATCH" >/dev/null 2>&1 || PATCH= |
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42 |
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43 # find optional visual utilities |
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44 FILEMERGE="/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge" |
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45 KDIFF3="kdiff3" |
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46 TKDIFF="tkdiff" |
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47 MELD="meld" |
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48 |
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49 type "$FILEMERGE" >/dev/null 2>&1 || FILEMERGE= |
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50 type "$KDIFF3" >/dev/null 2>&1 || KDIFF3= |
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51 type "$TKDIFF" >/dev/null 2>&1 || TKDIFF= |
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52 type "$MELD" >/dev/null 2>&1 || MELD= |
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53 |
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54 # Hack for Solaris |
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55 TEST="/usr/bin/test" |
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56 type "$TEST" >/dev/null 2>&1 || TEST="/bin/test" |
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57 type "$TEST" >/dev/null 2>&1 || TEST="test" |
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58 |
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59 # random part of names |
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60 RAND="$RANDOM$RANDOM" |
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61 |
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62 # temporary directory for diff+patch merge |
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63 HGTMP="${TMPDIR-/tmp}/hgmerge.$RAND" |
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64 |
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65 # backup file |
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66 BACKUP="$LOCAL.orig.$RAND" |
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67 |
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68 # file used to test for file change |
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69 CHGTEST="$LOCAL.chg.$RAND" |
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70 |
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71 # put all your required cleanup here |
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72 cleanup() { |
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73 rm -f "$BACKUP" "$CHGTEST" |
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74 rm -rf "$HGTMP" |
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75 } |
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76 |
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77 # functions concerning program exit |
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78 success() { |
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79 cleanup |
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80 exit 0 |
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81 } |
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82 |
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83 failure() { |
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84 echo "merge failed" 1>&2 |
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85 mv "$BACKUP" "$LOCAL" |
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86 cleanup |
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87 exit 1 |
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88 } |
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89 |
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90 # Ask if the merge was successful |
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91 ask_if_merged() { |
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92 while true; do |
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93 echo "$LOCAL seems unchanged." |
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94 echo "Was the merge successful? [y/n]" |
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95 read answer |
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96 case "$answer" in |
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97 y*|Y*) success;; |
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98 n*|N*) failure;; |
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99 esac |
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100 done |
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101 } |
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102 |
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103 # Check if conflict markers are present and ask if the merge was successful |
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104 conflicts_or_success() { |
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105 while egrep '^(<<<<<<< .*|=======|>>>>>>> .*)$' "$LOCAL" >/dev/null; do |
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106 echo "$LOCAL contains conflict markers." |
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107 echo "Keep this version? [y/n]" |
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108 read answer |
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109 case "$answer" in |
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110 y*|Y*) success;; |
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111 n*|N*) failure;; |
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112 esac |
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113 done |
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114 success |
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115 } |
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116 |
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117 # Clean up when interrupted |
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118 trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM |
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119 |
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120 # Back up our file (and try hard to keep the mtime unchanged) |
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121 mv "$LOCAL" "$BACKUP" |
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122 cp "$BACKUP" "$LOCAL" |
240 | 123 |
124 # Attempt to do a non-interactive merge | |
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125 if [ -n "$MERGE" -o -n "$DIFF3" ]; then |
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126 if [ -n "$MERGE" ]; then |
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127 $MERGE "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && success |
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128 elif [ -n "$DIFF3" ]; then |
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129 $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" && success |
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130 fi |
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131 if [ $? -gt 1 ]; then |
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132 echo "automatic merge failed! Exiting." 1>&2 |
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133 failure |
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134 fi |
240 | 135 fi |
136 | |
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137 # on MacOS X try FileMerge.app, shipped with Apple's developer tools |
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138 if [ -n "$FILEMERGE" ]; then |
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139 cp "$BACKUP" "$LOCAL" |
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140 cp "$BACKUP" "$CHGTEST" |
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141 # filemerge prefers the right by default |
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142 $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL" |
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143 [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure |
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144 $TEST "$LOCAL" -nt "$CHGTEST" && conflicts_or_success || ask_if_merged |
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145 fi |
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146 |
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147 if [ -n "$DISPLAY" ]; then |
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148 # try using kdiff3, which is fairly nice |
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149 if [ -n "$KDIFF3" ]; then |
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150 $KDIFF3 --auto "$BASE" "$BACKUP" "$OTHER" -o "$LOCAL" || failure |
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151 conflicts_or_success |
240 | 152 fi |
153 | |
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154 # try using tkdiff, which is a bit less sophisticated |
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155 if [ -n "$TKDIFF" ]; then |
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156 $TKDIFF "$BACKUP" "$OTHER" -a "$BASE" -o "$LOCAL" || failure |
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157 conflicts_or_success |
240 | 158 fi |
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159 |
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160 if [ -n "$MELD" ]; then |
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161 cp "$BACKUP" "$CHGTEST" |
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162 # protect our feet - meld allows us to save to the left file |
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163 cp "$BACKUP" "$LOCAL.tmp.$RAND" |
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164 # Meld doesn't have automatic merging, so to reduce intervention |
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165 # use the file with conflicts |
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166 $MELD "$LOCAL.tmp.$RAND" "$LOCAL" "$OTHER" || failure |
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167 # Also it doesn't return good error code |
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168 $TEST "$LOCAL" -nt "$CHGTEST" && conflicts_or_success || ask_if_merged |
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169 fi |
240 | 170 fi |
171 | |
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172 # Attempt to do a merge with $EDIT_PROG |
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173 if [ -n "$MERGE" -o -n "$DIFF3" ]; then |
242 | 174 echo "conflicts detected in $LOCAL" |
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175 cp "$BACKUP" "$CHGTEST" |
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176 case "$EDIT_PROG" in |
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177 "emacs") |
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178 $EDIT_PROG "$LOCAL" --eval '(condition-case nil (smerge-mode 1) (error nil))' || failure |
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179 ;; |
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180 *) |
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181 $EDIT_PROG "$LOCAL" || failure |
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182 ;; |
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183 esac |
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184 # Some editors do not return meaningful error codes |
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185 # Do not take any chances |
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186 $TEST "$LOCAL" -nt "$CHGTEST" && conflicts_or_success || ask_if_merged |
240 | 187 fi |
188 | |
189 # attempt to manually merge with diff and patch | |
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190 if [ -n "$DIFF" -a -n "$PATCH" ]; then |
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191 |
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192 (umask 077 && mkdir "$HGTMP") || { |
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193 echo "Could not create temporary directory $HGTMP" 1>&2 |
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194 failure |
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195 } |
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196 |
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197 $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || : |
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198 if $PATCH "$LOCAL" < "$HGTMP/diff"; then |
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199 success |
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200 else |
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201 # If rejects are empty after using the editor, merge was ok |
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202 $EDIT_PROG "$LOCAL" "$LOCAL.rej" || failure |
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203 $TEST -s "$LOCAL.rej" || success |
240 | 204 fi |
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205 failure |
240 | 206 fi |
207 | |
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208 echo |
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209 echo "hgmerge: unable to find any merge utility!" |
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210 echo "supported programs:" |
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211 echo "merge, FileMerge, tkdiff, kdiff3, meld, diff+patch" |
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212 echo |
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213 failure |