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https://github.com/scratchfoundation/gh-pages.git
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57 lines
1.3 KiB
Bash
57 lines
1.3 KiB
Bash
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#!/bin/bash
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#
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# Generate a Markdown-formatted changelog from merge commits.
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#
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set -o errexit
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#
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# Regex to match the standard pull request commit message. Creates capture
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# groups for pull request number, GitHub username, and commit message body.
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#
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MERGE_RE=Merge\ pull\ request\ #\([0-9]+\)\ from\ \([^/]+\)\/[^\ ]+\ \(.*\)
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GITHUB_URL=https://github.com
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PULLS_URL=${GITHUB_URL}/tschaub/gh-pages/pull
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display_usage() {
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cat <<-EOF
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Usage: ${1} <revision range>
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Creates a Markdown-formatted changelog given a revision range.
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E.g.
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${1} v3.0.0.. > changelog/v3.1.0.md
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See git-log(1) for details on the revision range syntax.
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EOF
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}
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#
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# Scan the git log for merge commit messages and output Markdown. This only
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# follows the first parent of merge commits to avoid merges within a topic
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# branch (instead only showing merges to master).
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#
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main() {
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git log --first-parent --format='%s %b' ${1} |
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{
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while read l; do
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if [[ ${l} =~ ${MERGE_RE} ]] ; then
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number="${BASH_REMATCH[1]}"
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author="${BASH_REMATCH[2]}"
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summary="${BASH_REMATCH[3]}"
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echo " * [#${number}](${PULLS_URL}/${number}) - ${summary} ([@${author}](${GITHUB_URL}/${author}))"
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fi
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done
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}
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}
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if test ${#} -ne 1; then
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display_usage ${0}
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exit 1
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else
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main ${1}
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fi
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