bin/git-rel

   1 #!/bin/sh
   2 # Usage: git-rel [<ref>]
   3 # Shows the relationship between the current branch and <ref>. With no <ref>,
   4 # the current branch's remote tracking branch is used.
   5 #
   6 # Examples:
   7 #
   8 #   $ git-rel
   9 #     15 ahead
  10 #     11 behind
  11 #
  12 #   $ git-rel v1.1
  13 #     230 ahead
  14
  15 strip_prefix () {
  16     echo "$@" |
  17     sed 's@refs/heads/@@'
  18 }
  19
  20 current_branch () {
  21     git symbolic-ref -q HEAD |
  22     sed 's@refs/heads/@@'
  23 }
  24
  25 tracking_branch () {
  26     remote=$(git config --get branch.$(current_branch).remote)
  27     merge=$(git config --get branch.$(current_branch).merge)
  28     echo "$remote/$(strip_prefix $merge)"
  29 }
  30
  31 ref="${1:-$(tracking_branch)}"
  32
  33 git rev-list --left-right --abbrev-commit --abbrev $ref...HEAD |
  34 cut -c1         |
  35 sed '
  36   s/>/ahead/
  37   s/</behind/
  38 '               |
  39 sort            |
  40 uniq -c