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#
# git-flow -- A collection of Git extensions to provide high-level
# repository operations for Vincent Driessen's branching model.
#
# Original blog post presenting this model is found at:
# http://nvie.com/git-model
#
# Feel free to contribute to this project at:
# http://github.com/nvie/gitflow
#
# Copyright 2010 Vincent Driessen. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY VINCENT DRIESSEN ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL VINCENT DRIESSEN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are
# those of the authors and should not be interpreted as representing official
# policies, either expressed or implied, of Vincent Driessen.
#
#
# Common functionality
#
# shell output
warn() { echo "$@" >&2; }
die() { warn "$@"; exit 1; }
escape() {
echo "$1" | sed 's/\([\.\$\*]\)/\\\1/g'
}
# set logic
has() {
local item=$1; shift
echo " $@ " | grep -q " $(escape $item) "
}
# basic math
min() { [ "$1" -le "$2" ] && echo "$1" || echo "$2"; }
max() { [ "$1" -ge "$2" ] && echo "$1" || echo "$2"; }
# basic string matching
startswith() { [ "$1" != "${1#$2}" ]; }
endswith() { [ "$1" != "${1%$2}" ]; }
# convenience functions for checking shFlags flags
flag() { local FLAG; eval FLAG='$FLAGS_'$1; [ $FLAG -eq $FLAGS_TRUE ]; }
noflag() { local FLAG; eval FLAG='$FLAGS_'$1; [ $FLAG -ne $FLAGS_TRUE ]; }
#
# Git specific common functionality
#
git_do() {
# equivalent to git, used to indicate actions that make modifications
if flag show_commands; then
echo "git $@" >&2
fi
git "$@"
}
git_local_branches() { git branch --no-color | sed 's/^[* ] //'; }
git_remote_branches() { git branch -r --no-color | sed 's/^[* ] //'; }
git_all_branches() { ( git branch --no-color; git branch -r --no-color) | sed 's/^[* ] //'; }
git_all_tags() { git tag; }
git_current_branch() {
git branch --no-color | grep '^\* ' | grep -v 'no branch' | sed 's/^* //g'
}
git_is_clean_working_tree() {
if ! git diff --no-ext-diff --ignore-submodules --quiet --exit-code; then
return 1
elif ! git diff-index --cached --quiet --ignore-submodules HEAD --; then
return 2
else
return 0
fi
}
git_repo_is_headless() {
! git rev-parse --quiet --verify HEAD >/dev/null 2>&1
}
git_local_branch_exists() {
has $1 $(git_local_branches)
}
git_remote_branch_exists() {
has $1 $(git_remote_branches)
}
git_branch_exists() {
has $1 $(git_all_branches)
}
git_tag_exists() {
has $1 $(git_all_tags)
}
#
# git_compare_branches()
#
# Tests whether branches and their "origin" counterparts have diverged and need
# merging first. It returns error codes to provide more detail, like so:
#
# 0 Branch heads point to the same commit
# 1 First given branch needs fast-forwarding
# 2 Second given branch needs fast-forwarding
# 3 Branch needs a real merge
# 4 There is no merge base, i.e. the branches have no common ancestors
#
git_compare_branches() {
local commit1=$(git rev-parse "$1")
local commit2=$(git rev-parse "$2")
if [ "$commit1" != "$commit2" ]; then
local base=$(git merge-base "$commit1" "$commit2")
if [ $? -ne 0 ]; then
return 4
elif [ "$commit1" = "$base" ]; then
return 1
elif [ "$commit2" = "$base" ]; then
return 2
else
return 3
fi
else
return 0
fi
}
#
# git_is_branch_merged_into()
#
# Checks whether branch $1 is succesfully merged into $2
#
git_is_branch_merged_into() {
local subject=$1
local base=$2
local all_merges="$(git branch --no-color --contains $subject | sed 's/^[* ] //')"
has $base $all_merges
}
#
# gitflow specific common functionality
#
# check if this repo has been inited for gitflow
gitflow_has_master_configured() {
local master=$(git config --get gitflow.branch.master)
[ "$master" != "" ] && git_local_branch_exists "$master"
}
gitflow_has_develop_configured() {
local develop=$(git config --get gitflow.branch.develop)
[ "$develop" != "" ] && git_local_branch_exists "$develop"
}
gitflow_has_prefixes_configured() {
git config --get gitflow.prefix.feature >/dev/null 2>&1 && \
git config --get gitflow.prefix.release >/dev/null 2>&1 && \
git config --get gitflow.prefix.hotfix >/dev/null 2>&1 && \
git config --get gitflow.prefix.support >/dev/null 2>&1 && \
git config --get gitflow.prefix.versiontag >/dev/null 2>&1
}
gitflow_is_initialized() {
gitflow_has_master_configured && \
gitflow_has_develop_configured && \
[ "$(git config --get gitflow.branch.master)" != \
"$(git config --get gitflow.branch.develop)" ] && \
gitflow_has_prefixes_configured
}
# loading settings that can be overridden using git config
gitflow_load_settings() {
export DOT_GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
export MASTER_BRANCH=$(git config --get gitflow.branch.master)
export DEVELOP_BRANCH=$(git config --get gitflow.branch.develop)
export ORIGIN=$(git config --get gitflow.origin || echo origin)
}
#
# gitflow_resolve_nameprefix
#
# Inputs:
# $1 = name prefix to resolve
# $2 = branch prefix to use
#
# Searches branch names from git_local_branches() to look for a unique
# branch name whose name starts with the given name prefix.
#
# There are multiple exit codes possible:
# 0: The unambiguous full name of the branch is written to stdout
# (success)
# 1: No match is found.
# 2: Multiple matches found. These matches are written to stderr
#
gitflow_resolve_nameprefix() {
local name=$1
local prefix=$2
local matches
local num_matches
# first, check if there is a perfect match
if git_local_branch_exists "$prefix$name"; then
echo "$name"
return 0
fi
matches=$(echo "$(git_local_branches)" | grep "^$(escape "$prefix$name")")
num_matches=$(echo "$matches" | wc -l)
if [ -z "$matches" ]; then
# no prefix match, so take it literally
warn "No branch matches prefix '$name'"
return 1
else
if [ $num_matches -eq 1 ]; then
echo "${matches#$prefix}"
return 0
else
# multiple matches, cannot decide
warn "Multiple branches match prefix '$name':"
for match in $matches; do
warn "- $match"
done
return 2
fi
fi
}
#
# Assertions for use in git-flow subcommands
#
require_git_repo() {
if ! git rev-parse --git-dir >/dev/null 2>&1; then
die "fatal: Not a git repository"
fi
}
require_gitflow_initialized() {
if ! gitflow_is_initialized; then
die "fatal: Not a gitflow-enabled repo yet. Please run \"git flow init\" first."
fi
}
require_clean_working_tree() {
git_is_clean_working_tree
local result=$?
if [ $result -eq 1 ]; then
die "fatal: Working tree contains unstaged changes. Aborting."
fi
if [ $result -eq 2 ]; then
die "fatal: Index contains uncommited changes. Aborting."
fi
}
require_local_branch() {
if ! git_local_branch_exists $1; then
die "fatal: Local branch '$1' does not exist and is required."
fi
}
require_remote_branch() {
if ! has $1 $(git_remote_branches); then
die "Remote branch '$1' does not exist and is required."
fi
}
require_branch() {
if ! has $1 $(git_all_branches); then
die "Branch '$1' does not exist and is required."
fi
}
require_branch_absent() {
if has $1 $(git_all_branches); then
die "Branch '$1' already exists. Pick another name."
fi
}
require_tag_absent() {
for tag in $(git_all_tags); do
if [ "$1" = "$tag" ]; then
die "Tag '$1' already exists. Pick another name."
fi
done
}
require_branches_equal() {
require_local_branch "$1"
require_remote_branch "$2"
git_compare_branches "$1" "$2"
local status=$?
if [ $status -gt 0 ]; then
warn "Branches '$1' and '$2' have diverged."
if [ $status -eq 1 ]; then
die "And branch '$1' may be fast-forwarded."
elif [ $status -eq 2 ]; then
# Warn here, since there is no harm in being ahead
warn "And local branch '$1' is ahead of '$2'."
else
die "Branches need merging first."
fi
fi
}
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