From cc405bc2ab872cb2b7690d5a9d8c5ff35691a062 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.dev>
Date: Tue, 21 May 2024 08:00:00 +0100
Subject: [PATCH] Initial commit

---
 .gitignore                   |  1 +
 git-commit-length-counter.sh | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 .gitignore
 create mode 100755 git-commit-length-counter.sh

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c4a847d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/result
diff --git a/git-commit-length-counter.sh b/git-commit-length-counter.sh
new file mode 100755
index 0000000..721a127
--- /dev/null
+++ b/git-commit-length-counter.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# Default to running in the current directory, but allow for overriding the
+# repo path using an environment variable.
+# e.g. `REPO=../somewhere-else ./git-commit-length-counter`
+REPO="${REPO:-$(pwd)}"
+
+# Return early if the repository directory doesn't exist.
+[[ ! -d "${REPO}" ]] && exit 2
+
+result_file="./result"
+
+for commit_id in $(git -C "${REPO}" rev-list --all --no-merges); do
+    echo "Processing commit ${commit_id}..."
+    # Calculate the legnth of the commit message.
+    commit_message=$(GIT_PAGER=cat git -C "${REPO}" show "${commit_id}" -s --format=%B)
+    commit_message_length=$(echo "${commit_message}" | wc -l)
+
+    # Store the commit IDs and the message length.
+    echo "${commit_message_length} ${commit_id}" >> "${result_file}"
+done
+
+# Sort the result file so all files are sorted by the length of the message.
+sort "${result_file}" --reverse --numeric-sort --output "${result_file}"
+
+head "${result_file}" --lines 5
+
+# Show the commit with the longest message.
+commit_with_the_longest_message=$(head "${result_file}" --lines 1 | cut -d " " -f2)
+git -C "${REPO}" show "${commit_with_the_longest_message}"