109 lines
2.7 KiB
Plaintext
109 lines
2.7 KiB
Plaintext
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#!/usr/bin/env bash
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# Summarize commit history and diff of Markdown files in the current Git repo
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# Usage:
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# markdown-git-changes [COMMIT [MARKDOWN_FILE]...]
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#
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# You can specify COMMIT as `--' to automatically see changes of given files
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# against the upstream branch, HEAD^, or HEAD.
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#
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# Author: Jaeho Shin <netj@cs.stanford.edu>
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# Created: 2013-11-18
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set -eu
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Here=$(dirname "$0")
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PATH="$Here:$PATH" # add this directory to PATH for markdown-format-wdiff
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# TODO passthru any diff options
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# how to find markdown files in the current git repo
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files=()
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find_markdown_files() {
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local IFS=$'\n'
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set -- $(git ls-files | grep '\.\(md\|mkd\|markdn\|markdown\)$')
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files=("$@")
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}
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# diff against given commit, or upstream branch, or HEAD^ if no local changes, or HEAD
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since=--; [ $# -eq 0 ] || { since=$1; shift; }
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if [ x"$since" = x"--" ]; then
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find_markdown_files
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since=`
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git rev-parse --abbrev-ref HEAD@{upstream} 2>/dev/null ||
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case $(git status --porcelain --untracked-files=no "${files[@]}" | wc -l) in
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0) echo 'HEAD^' ;;
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*) echo 'HEAD'
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esac
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`
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fi
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# unless list of files are given, find Markdown documents in the Git repo
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if [ $# -gt 0 ]; then
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files=("$@")
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elif [ ${#files[@]} -eq 0 ]; then
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find_markdown_files
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fi
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# make sure ${files[@]} isn't empty
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[ ${#files[@]} -gt 0 ] || files+=(.)
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# summarize commit history
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{
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echo "\$ git log --oneline "$since"..HEAD $*"
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git log --oneline "$since"..HEAD "${files[@]}"
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} |
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sed 's/^/ /'
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echo
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# and embed the overall word diff
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git diff ${GIT_DIFF_OPTS:-} --word-diff --patch-with-stat \
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--minimal --patience \
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"$since" -- "${files[@]}" |
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sed '
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# format prologue
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1,/^diff /{
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/^diff/! s/^/ /
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}
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# format file headers
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/^diff /,/^+++ /{
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/^diff /{
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s|^diff .* \([^/]/\)\(.*\)|<div class="file-start"><code>\2</code></div>|
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a\
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\
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}
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/^<div class="file-start">/! s/^/ /
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}
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# format hunks
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/^@@ -.* +.* @@/{
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s| @@.*| @@|
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s|^|<div class="hunk-start"><code>|
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s|$|</code></div>|
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}
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' |
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markdown-format-wdiff
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echo '
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<style>
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pre:first-of-type { width: 78%; margin-left: auto; margin-right: auto; }
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.file-start + p + pre,
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.file-start + pre { margin-left: 61.8%; }
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.file-start,
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.hunk-start{ text-align: right; }
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.file-start code{ font-size: inherit; }
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.file-start/*:not(:first-of-type)*/{
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font-size: 150%;
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margin-top: 23.6%;
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border-bottom: 1ex solid #ccc;
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padding-bottom: 1ex;
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}
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.hunk-start{
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margin-top: 2ex;
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border-bottom: 1ex dashed #ccc;
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padding-bottom: 1ex;
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}
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</style>
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'
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