git-bfetch

#!/bin/bash -e
## Check for updates, does a fetch (dry-run)
## but only for the current branch

## read input, display help if necessary
if [[ "$@" == *--help* ]]; then
    cat<<EOF
 Fetch and display output for the current branch

 This command fetches changes from origin just like "git fetch",
 but swallows all output that does not belong to the currently
 checked out branch. 

 Usage:
    git bfetch [--dry-run]

    --dry-run: show what would be done without making
       any changes. 
EOF
    exit 0;
fi

if [[ "$1" ]]; then
    if [[ "$1" == "--dry-run" ]]; then
	dryrun="--dry-run"
    else 
	cat >&2 <<EOF 
Error: bfetch does only accept the argument --dry-run, nothing else.
EOF
	exit 1
    fi
fi

## from the git mailinglist:
function git
{
    LC_MESSAGES=C command git "$@"
} 
export git


## get current branch 
branch=`git name-rev --name-only HEAD`

## do the fetch and filter the result
git fetch $dryrun 2>&1 | grep " $branch " | cat