From fe309664ea804d17812bab22927756dc35e5e955 Mon Sep 17 00:00:00 2001
From: Patrick Steinhardt <ps@pks.im>
Date: Thu, 19 Mar 2026 06:33:22 +0100
Subject: contrib: move "coverage-diff.sh" script into "tools/"

The "coverage-diff.sh" script can be used to get information about test
coverage fro the Git codebase. It is thus rather specific to our build
and test infrastructure and part of the developer-facing tooling. The
fact that this script is part of "contrib/" is thus rather misleading
and a historic wart.

Promote the tool into the new "tools/" directory.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 contrib/coverage-diff.sh | 103 -----------------------------------------------
 1 file changed, 103 deletions(-)
 delete mode 100755 contrib/coverage-diff.sh

(limited to 'contrib/coverage-diff.sh')

diff --git a/contrib/coverage-diff.sh b/contrib/coverage-diff.sh
deleted file mode 100755
index 6ce9603568..0000000000
--- a/contrib/coverage-diff.sh
+++ /dev/null
@@ -1,103 +0,0 @@
-#!/bin/sh
-
-# Usage: Run 'contrib/coverage-diff.sh <version1> <version2>' from source-root
-# after running
-#
-#     make coverage-test
-#     make coverage-report
-#
-# while checked out at <version2>. This script combines the *.gcov files
-# generated by the 'make' commands above with 'git diff <version1> <version2>'
-# to report new lines that are not covered by the test suite.
-
-V1=$1
-V2=$2
-
-diff_lines () {
-	perl -e '
-		my $line_num;
-		while (<>) {
-			# Hunk header?  Grab the beginning in postimage.
-			if (/^@@ -\d+(?:,\d+)? \+(\d+)(?:,\d+)? @@/) {
-				$line_num = $1;
-				next;
-			}
-
-			# Have we seen a hunk?  Ignore "diff --git" etc.
-			next unless defined $line_num;
-
-			# Deleted line? Ignore.
-			if (/^-/) {
-				next;
-			}
-
-			# Show only the line number of added lines.
-			if (/^\+/) {
-				print "$line_num\n";
-			}
-			# Either common context or added line appear in
-			# the postimage.  Count it.
-			$line_num++;
-		}
-	'
-}
-
-files=$(git diff --name-only "$V1" "$V2" -- \*.c)
-
-# create empty file
->coverage-data.txt
-
-for file in $files
-do
-	git diff "$V1" "$V2" -- "$file" |
-	diff_lines |
-	sort >new_lines.txt
-
-	if ! test -s new_lines.txt
-	then
-		continue
-	fi
-
-	hash_file=$(echo $file | sed "s/\//\#/")
-
-	if ! test -s "$hash_file.gcov"
-	then
-		continue
-	fi
-
-	sed -ne '/#####:/{
-			s/    #####://
-			s/:.*//
-			s/ //g
-			p
-		}' "$hash_file.gcov" |
-	sort >uncovered_lines.txt
-
-	comm -12 uncovered_lines.txt new_lines.txt |
-	sed -e 's/$/\)/' -e 's/^/ /' >uncovered_new_lines.txt
-
-	grep -q '[^[:space:]]' <uncovered_new_lines.txt &&
-	echo $file >>coverage-data.txt &&
-	git blame -s "$V2" -- "$file" |
-	sed 's/\t//g' |
-	grep -f uncovered_new_lines.txt >>coverage-data.txt &&
-	echo >>coverage-data.txt
-
-	rm -f new_lines.txt uncovered_lines.txt uncovered_new_lines.txt
-done
-
-cat coverage-data.txt
-
-echo "Commits introducing uncovered code:"
-
-commit_list=$(awk '/^[0-9a-f]{7,}/ { print $1 }' coverage-data.txt | sort -u)
-
-(
-	for commit in $commit_list
-	do
-		git log --no-decorate --pretty=format:'%an      %h: %s' -1 $commit
-		echo
-	done
-) | sort
-
-rm coverage-data.txt
-- 
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