Mercurial > hg
annotate hgmerge @ 5471:5b81c1cc6ebe
tests: make test-mq-guards work with ksh
author | Jim Hague <jim.hague@acm.org> |
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date | Fri, 19 Oct 2007 19:20:33 +0000 |
parents | f53d97d651f4 |
children | 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="$3" |
240 | 19 |
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20 if [ -z "$EDITOR" ]; then |
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21 EDITOR="vi" |
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22 fi |
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23 |
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24 # find decent versions of our utilities, insisting on the GNU versions where we |
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25 # need to |
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26 MERGE="merge" |
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27 DIFF3="gdiff3" |
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28 DIFF="gdiff" |
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29 PATCH="gpatch" |
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30 |
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31 type "$MERGE" >/dev/null 2>&1 || MERGE= |
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32 type "$DIFF3" >/dev/null 2>&1 || DIFF3="diff3" |
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33 $DIFF3 --version >/dev/null 2>&1 || DIFF3= |
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34 type "$DIFF" >/dev/null 2>&1 || DIFF="diff" |
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35 type "$DIFF" >/dev/null 2>&1 || DIFF= |
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36 type "$PATCH" >/dev/null 2>&1 || PATCH="patch" |
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37 type "$PATCH" >/dev/null 2>&1 || PATCH= |
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38 |
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39 # find optional visual utilities |
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40 FILEMERGE="/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge" |
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41 KDIFF3="kdiff3" |
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42 TKDIFF="tkdiff" |
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43 MELD="meld" |
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44 |
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45 type "$FILEMERGE" >/dev/null 2>&1 || FILEMERGE= |
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46 type "$KDIFF3" >/dev/null 2>&1 || KDIFF3= |
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47 type "$TKDIFF" >/dev/null 2>&1 || TKDIFF= |
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48 type "$MELD" >/dev/null 2>&1 || MELD= |
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49 |
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50 # Hack for Solaris |
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51 TEST="/usr/bin/test" |
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52 type "$TEST" >/dev/null 2>&1 || TEST="/bin/test" |
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53 type "$TEST" >/dev/null 2>&1 || TEST="test" |
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54 |
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55 # random part of names |
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56 RAND="$RANDOM$RANDOM" |
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57 |
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58 # temporary directory for diff+patch merge |
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59 HGTMP="${TMPDIR-/tmp}/hgmerge.$RAND" |
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60 |
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61 # backup file |
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62 BACKUP="$LOCAL.orig.$RAND" |
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63 |
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64 # file used to test for file change |
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65 CHGTEST="$LOCAL.chg.$RAND" |
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66 |
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67 # put all your required cleanup here |
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68 cleanup() { |
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69 rm -f "$BACKUP" "$CHGTEST" |
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70 rm -rf "$HGTMP" |
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71 } |
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72 |
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73 # functions concerning program exit |
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74 success() { |
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75 cleanup |
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76 exit 0 |
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77 } |
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78 |
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79 failure() { |
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80 echo "merge failed" 1>&2 |
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81 mv "$BACKUP" "$LOCAL" |
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82 cleanup |
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83 exit 1 |
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84 } |
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85 |
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86 # Ask if the merge was successful |
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87 ask_if_merged() { |
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88 while true; do |
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89 echo "$LOCAL seems unchanged." |
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90 echo "Was the merge successful? [y/n]" |
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91 read answer |
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92 case "$answer" in |
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93 y*|Y*) success;; |
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94 n*|N*) failure;; |
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95 esac |
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96 done |
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97 } |
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98 |
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99 # Check if conflict markers are present and ask if the merge was successful |
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100 conflicts_or_success() { |
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101 while egrep '^(<<<<<<< .*|=======|>>>>>>> .*)$' "$LOCAL" >/dev/null; do |
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102 echo "$LOCAL contains conflict markers." |
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103 echo "Keep this version? [y/n]" |
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104 read answer |
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105 case "$answer" in |
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106 y*|Y*) success;; |
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107 n*|N*) failure;; |
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108 esac |
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109 done |
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110 success |
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111 } |
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112 |
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113 # Clean up when interrupted |
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114 trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM |
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115 |
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116 # Back up our file (and try hard to keep the mtime unchanged) |
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117 mv "$LOCAL" "$BACKUP" |
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118 cp "$BACKUP" "$LOCAL" |
240 | 119 |
120 # Attempt to do a non-interactive merge | |
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121 if [ -n "$MERGE" -o -n "$DIFF3" ]; then |
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122 if [ -n "$MERGE" ]; then |
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123 $MERGE "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && success |
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124 elif [ -n "$DIFF3" ]; then |
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125 $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" && success |
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126 fi |
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127 if [ $? -gt 1 ]; then |
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128 echo "automatic merge failed! Exiting." 1>&2 |
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129 failure |
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130 fi |
240 | 131 fi |
132 | |
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133 # on MacOS X try FileMerge.app, shipped with Apple's developer tools |
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134 if [ -n "$FILEMERGE" ]; then |
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135 cp "$BACKUP" "$LOCAL" |
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136 cp "$BACKUP" "$CHGTEST" |
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137 # filemerge prefers the right by default |
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138 $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL" |
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139 [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure |
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140 $TEST "$LOCAL" -nt "$CHGTEST" && conflicts_or_success || ask_if_merged |
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141 fi |
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142 |
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143 if [ -n "$DISPLAY" ]; then |
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144 # try using kdiff3, which is fairly nice |
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145 if [ -n "$KDIFF3" ]; then |
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146 $KDIFF3 --auto "$BASE" "$BACKUP" "$OTHER" -o "$LOCAL" || failure |
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147 conflicts_or_success |
240 | 148 fi |
149 | |
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150 # try using tkdiff, which is a bit less sophisticated |
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151 if [ -n "$TKDIFF" ]; then |
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152 $TKDIFF "$BACKUP" "$OTHER" -a "$BASE" -o "$LOCAL" || failure |
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153 conflicts_or_success |
240 | 154 fi |
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155 |
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156 if [ -n "$MELD" ]; then |
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157 cp "$BACKUP" "$CHGTEST" |
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158 # protect our feet - meld allows us to save to the left file |
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159 cp "$BACKUP" "$LOCAL.tmp.$RAND" |
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160 # Meld doesn't have automatic merging, so to reduce intervention |
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161 # use the file with conflicts |
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162 $MELD "$LOCAL.tmp.$RAND" "$LOCAL" "$OTHER" || failure |
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163 # Also it doesn't return good error code |
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164 $TEST "$LOCAL" -nt "$CHGTEST" && conflicts_or_success || ask_if_merged |
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165 fi |
240 | 166 fi |
167 | |
168 # Attempt to do a merge with $EDITOR | |
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169 if [ -n "$MERGE" -o -n "$DIFF3" ]; then |
242 | 170 echo "conflicts detected in $LOCAL" |
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171 cp "$BACKUP" "$CHGTEST" |
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172 case "$EDITOR" in |
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173 "emacs") |
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174 $EDITOR "$LOCAL" --eval '(condition-case nil (smerge-mode 1) (error nil))' || failure |
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175 ;; |
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176 *) |
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177 $EDITOR "$LOCAL" || failure |
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178 ;; |
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179 esac |
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180 # Some editors do not return meaningful error codes |
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181 # Do not take any chances |
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182 $TEST "$LOCAL" -nt "$CHGTEST" && conflicts_or_success || ask_if_merged |
240 | 183 fi |
184 | |
185 # attempt to manually merge with diff and patch | |
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186 if [ -n "$DIFF" -a -n "$PATCH" ]; then |
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187 |
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188 (umask 077 && mkdir "$HGTMP") || { |
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189 echo "Could not create temporary directory $HGTMP" 1>&2 |
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190 failure |
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191 } |
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192 |
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193 $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || : |
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194 if $PATCH "$LOCAL" < "$HGTMP/diff"; then |
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195 success |
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196 else |
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197 # If rejects are empty after using the editor, merge was ok |
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198 $EDITOR "$LOCAL" "$LOCAL.rej" || failure |
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199 $TEST -s "$LOCAL.rej" || success |
240 | 200 fi |
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201 failure |
240 | 202 fi |
203 | |
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204 echo |
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205 echo "hgmerge: unable to find any merge utility!" |
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206 echo "supported programs:" |
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207 echo "merge, FileMerge, tkdiff, kdiff3, meld, diff+patch" |
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208 echo |
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209 failure |