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gitflow-common
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gitflow-common
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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/archives/323
#
# Feel free to contribute to this project at:
# http://github.com/nvie/gitflow
#
# Copyright (c) 2010 by Vincent Driessen
# Copyright (c) 2010 by Benedikt Böhm
#
# shell output
warn() { echo "$@" >&2; }
die() { warn "$@"; exit 1; }
# set logic
has() {
local item=$1; shift
echo " $@ " | grep -q " $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 $FLAGS_TRUE ]; }
#
# Git specific common functionality
#
# get all available branches
gitflow_local_branches() { git branch | sed 's/^[* ] //'; }
gitflow_remote_branches() { git branch -r | sed 's/^[* ] //'; }
gitflow_all_branches() { gitflow_local_branches; gitflow_remote_branches; }
gitflow_all_tags() { git tag; }
# loading settings that can be overridden using git config
gitflow_load_settings() {
export GIT_DIR=$(git rev-parse --git-dir >/dev/null 2>&1)
export MASTER_BRANCH=$(git config --get gitflow.branch.master || echo master)
export DEVELOP_BRANCH=$(git config --get gitflow.branch.develop || echo develop)
export ORIGIN=$(git config --get gitflow.origin || echo origin)
export README=$(git config --get gitflow.readme || echo README)
}
#
# resolve_nameprefix
#
# Inputs:
# $1 = name prefix to resolve
# $2 = branch prefix to use
#
# Searches branch names from gitflow_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
#
resolve_nameprefix() {
local name=$1
local prefix=$2
local matches
local num_matches
# first, check if there is a perfect match
if has "$(gitflow_local_branches)" "$prefix$name"; then
echo "$name"
return 0
fi
matches=$(echo "$(gitflow_local_branches)" | grep "^$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 "- $match"
done
return 2
fi
fi
}
gitflow_current_branch() {
git branch | grep '^\* ' | grep -v 'no branch' | sed 's/^* //g'
}
gitflow_test_clean_working_tree() {
if ! git diff --no-ext-diff --ignore-submodules --quiet --exit-code; then
return 1
elif ! git diff-index --cached --quiet --ignore-submodules HEAD --; then
return 2
else
return 0
fi
}
gitflow_require_git_repo() {
if ! git rev-parse --git-dir >/dev/null 2>&1; then
die "Not a git repository"
fi
}
gitflow_require_clean_working_tree() {
gitflow_test_clean_working_tree
local result=$?
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
}
gitflow_require_local_branch() {
if ! has $1 $(gitflow_local_branches); then
die "fatal: Local branch '$1' does not exist and is required."
fi
}
gitflow_require_remote_branch() {
if ! has $1 $(gitflow_remote_branches); then
die "Remote branch '$1' does not exist and is required."
fi
}
gitflow_require_branch() {
if ! has $1 $(gitflow_all_branches); then
die "Branch '$1' does not exist and is required."
fi
}
gitflow_require_branch_absent() {
if has $1 $(gitflow_all_branches); then
die "Branch '$1' already exists. Pick another name."
fi
}
gitflow_require_tag_absent() {
if has $1 $(gitflow_all_tags); then
die "Tag '$1' already exists. Pick another name."
fi
}
gitflow_tag_exists() {
has $1 $(gitflow_all_tags)
}
#
# gitflow_test_branches_equal()
#
# Tests whether branches and their "origin" counterparts have diverged and need
# merging first. It returns error codes to provide more detail, like so:
#
# 0 Branch heads point to the same commit
# 1 First given branch needs fast-forwarding
# 2 Second given branch needs fast-forwarding
# 3 Branch needs a real merge
#
gitflow_test_branches_equal() {
local commit1=$(git rev-parse "$1")
local commit2=$(git rev-parse "$2")
if [ "$commit1" != "$commit2" ]; then
local base=$(git merge-base "$commit1" "$commit2")
if [ "$commit1" = "$base" ]; then
return 1
elif [ "$commit2" = "$base" ]; then
return 2
else
return 3
fi
else
return 0
fi
}
gitflow_require_branches_equal() {
gitflow_require_local_branch "$1"
gitflow_require_remote_branch "$2"
gitflow_test_branches_equal "$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
}
#
# gitflow_is_branch_merged_into()
#
# Checks whether branch $1 is succesfully merged into $2
#
gitflow_is_branch_merged_into() {
local subject=$1
local base=$2
local all_merges=$(git branch --contains $subject | sed 's/^[* ] //')
has $base $all_merges
}