fish function that prepares a git commit command with message containing the jira ticket number

commit.bash

# commit with juira-ticket-id shortcut
#
# install via `cat commit.bash >> ~/.bashrc`
# Use:
#   Assuming you are in a git repository of a bitbucket / jira branch using the atlassian jira git flow conventions
#   example "feature/EXP-1337-cool-new-feature
#
#   > commit -a
#     will call
#   > git commit -em "EXP-1337: " -a
#     opening your configured editor with the Ticket-ID prefixed
#   

function commit() {
  if [ "$(uname)" == 'Darwin' ];
  then
    sedr="sed -E"
  else
    sedr="sed -r"
  fi

  _ticket=$(git branch | grep \* | $sedr 's#^\*[[:space:]]+(feature|hotfix|bugfix)/?([[:alpha:]]+-[[:digit:]]+).*$#\2#')

  git commit -em "$_ticket: " $*
}

commit.fish

# save as ~/.config/fish/functions/commit.fish
# Use:
#   Assuming you are in a git repository of a bitbucket / jira branch using the atlassian jira git flow conventions
#   example "feature/EXP-1337-cool-new-feature
#
#   > commit
#     will expand to
#   > git commit -m 'EXP-1337: '
#     resting the cursor just before the last quote
#   

function commit
  function sedr
    switch (uname)
    case 'Darwin'
      sed -E $argv
    case '*'
      sed -r $argv
    end
  end

  set _ticket (git branch ^/dev/null | \
                grep \* | \
                sedr 's#^\*[[:space:]]+(feature|hotfix|bugfix)/?([[:alpha:]]+-[[:digit:]]+).*$#\2#')

  commandline -r "git commit -m '$_ticket: '"
  commandline -C (expr (commandline -C) - 1)
end

I added a function to omit the prefix if no ticket identifier was found, maybe you want to port that. https://gist.github.com/dedeibel/a07cde2f2c8de7a722092f7b54039026