git-branch.sh

   1 #!/bin/sh
   2
   3 . git-sh-setup || die "Not a git archive"
   4
   5 usage () {
   6     echo >&2 "usage: $(basename $0)"' [<branchname> [start-point]]
   7
   8 If no arguments, show available branches and mark current branch with a star.
   9 If one argument, create a new branch <branchname> based off of current HEAD.
  10 If two arguments, create a new branch <branchname> based off of <start-point>.
  11 '
  12     exit 1
  13 }
  14
  15 case "$#" in
  16 0)
  17         headref=$(readlink "$GIT_DIR/HEAD" | sed -e 's|^refs/heads/||')
  18         git-rev-parse --symbolic --all |
  19         sed -ne 's|^refs/heads/||p' |
  20         sort |
  21         while read ref
  22         do
  23                 if test "$headref" = "$ref"
  24                 then
  25                         pfx='*'
  26                 else
  27                         pfx=' '
  28                 fi
  29                 echo "$pfx $ref"
  30         done
  31         exit 0 ;;
  32 1)
  33         head=HEAD ;;
  34 2)
  35         head="$2^0" ;;
  36 esac
  37 branchname="$1"
  38
  39 case "$branchname" in
  40 -*)
  41         usage;;
  42 esac
  43
  44 rev=$(git-rev-parse --verify "$head") || exit
  45
  46 [ -e "$GIT_DIR/refs/heads/$branchname" ] && die "$branchname already exists"
  47
  48 echo $rev > "$GIT_DIR/refs/heads/$branchname"