git-pull.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Junio C Hamano
   4 #
   5 # Fetch one or more remote refs and merge it/them into the current HEAD.
   6
   7 USAGE='[-n | --no-summary] [--no-commit] [-s strategy]... [<fetch-options>] <repo> <head>...'
   8 LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
   9 . git-sh-setup
  10
  11 strategy_args= no_summary= no_commit=
  12 while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac
  13 do
  14         case "$1" in
  15         -n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
  16                 --no-summa|--no-summar|--no-summary)
  17                 no_summary=-n ;;
  18         --no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
  19                 no_commit=--no-commit ;;
  20         -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
  21                 --strateg=*|--strategy=*|\
  22         -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
  23                 case "$#,$1" in
  24                 *,*=*)
  25                         strategy=`expr "$1" : '-[^=]*=\(.*\)'` ;;
  26                 1,*)
  27                         usage ;;
  28                 *)
  29                         strategy="$2"
  30                         shift ;;
  31                 esac
  32                 strategy_args="${strategy_args}-s $strategy "
  33                 ;;
  34         -h|--h|--he|--hel|--help)
  35                 usage
  36                 ;;
  37         -*)
  38                 # Pass thru anything that is meant for fetch.
  39                 break
  40                 ;;
  41         esac
  42         shift
  43 done
  44
  45 orig_head=$(git-rev-parse --verify HEAD) || die "Pulling into a black hole?"
  46 git-fetch --update-head-ok "$@" || exit 1
  47
  48 curr_head=$(git-rev-parse --verify HEAD)
  49 if test "$curr_head" != "$orig_head"
  50 then
  51         # The fetch involved updating the current branch.
  52
  53         # The working tree and the index file is still based on the
  54         # $orig_head commit, but we are merging into $curr_head.
  55         # First update the working tree to match $curr_head.
  56
  57         echo >&2 "Warning: fetch updated the current branch head."
  58         echo >&2 "Warning: fast forwarding your working tree."
  59         git-read-tree -u -m "$orig_head" "$curr_head" ||
  60                 die "You need to first update your working tree."
  61 fi
  62
  63 merge_head=$(sed -e '/  not-for-merge   /d' \
  64         -e 's/  .*//' "$GIT_DIR"/FETCH_HEAD | \
  65         tr '\012' ' ')
  66
  67 case "$merge_head" in
  68 '')
  69         echo >&2 "No changes."
  70         exit 0
  71         ;;
  72 ?*' '?*)
  73         var=`git repo-config --get pull.octopus`
  74         if test '' = "$var"
  75         then
  76                 strategy_default_args='-s octopus'
  77         else
  78                 strategy_default_args="-s $var"
  79         fi
  80         ;;
  81 *)
  82         var=`git repo-config --get pull.twohead`
  83         if test '' = "$var"
  84         then
  85                 strategy_default_args='-s recursive'
  86         else
  87                 strategy_default_args="-s $var"
  88         fi
  89         ;;
  90 esac
  91
  92 case "$strategy_args" in
  93 '')
  94         strategy_args=$strategy_default_args
  95         ;;
  96 esac
  97
  98 merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD")
  99 git-merge $no_summary $no_commit $strategy_args "$merge_name" HEAD $merge_head