#!/usr/bin/env bash

#

# @license Apache-2.0

#

# Copyright (c) 2017 The Stdlib Authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# Prints filename changes.

#

# <weekday> <month> <day> <time> <year> <author_first_name> <author_last_name> <original_filename> <new_filename> <%>

# * `git log --reverse`

# - Show commit logs in reverse order.

# * `--find-renames`

# - Find file renames.

# * `--name-status`

# - Show only names.

# * `--diff-filter R`

# - Only select files which are renamed (R).

# * `--format=format:""`

# - Format the log.

# * `--date=format:""`

# - Format the date.

# * `awk '{}'

# - Process each commit.

git log \

--reverse \

--find-renames \

--name-status \

--diff-filter R \

--format=format:"%ad %aN" \

--date=format:"%a %b %d %T %Y" \

| awk '

# Skip empty lines:

NF == 0 {

next

}

# Date lines:

! /^R/ {

date = $0

next

}

# Filename changes:

{

pct = substr($1, 2)

# Remove leading zeros...

if (match(pct, /^0[1-9]/)) {

pct = substr(pct, 2)

} else if (match(pct, /^00[1-9]/)) {

pct = substr(pct, 2)

} else if (match(pct, /^000/)) {

pct = 0

}

print date OFS $2 OFS $3 OFS pct

}

'