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authorJunio C Hamano <gitster@pobox.com>2018-10-26 05:22:10 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-10-26 05:22:10 (GMT)
commit3c4a8214a07d3903c1563ee0bd98a886874146b6 (patch)
tree71be2ad218ea7b4c4d11fcf4b4a45abc82b8985a
parent778bb5eaaac8f12406e6c56751886114c6a4ef4d (diff)
parent783faedd651356663678529109c726bc94d854c0 (diff)
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Merge branch 'ds/coverage-diff'
The result of coverage test can be combined with "git blame" to check the test coverage of code introduced recently with a new 'coverage-diff' tool (in contrib/). * ds/coverage-diff: contrib: add coverage-diff script
-rwxr-xr-xcontrib/coverage-diff.sh108
1 files changed, 108 insertions, 0 deletions
diff --git a/contrib/coverage-diff.sh b/contrib/coverage-diff.sh
new file mode 100755
index 0000000..4ec419f
--- /dev/null
+++ b/contrib/coverage-diff.sh
@@ -0,0 +1,108 @@
+#!/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
+ }' "$hash_file.gcov" |
+ sort >uncovered_lines.txt
+
+ comm -12 uncovered_lines.txt new_lines.txt |
+ sed -e 's/$/\)/' |
+ sed -e 's/^/ /' >uncovered_new_lines.txt
+
+ grep -q '[^[:space:]]' <uncovered_new_lines.txt &&
+ echo $file >>coverage-data.txt &&
+ git blame -s "$V2" -- "$file" |
+ sed 's/\t//g' |
+ grep -f uncovered_new_lines.txt >>coverage-data.txt &&
+ echo >>coverage-data.txt
+
+ rm -f new_lines.txt uncovered_lines.txt uncovered_new_lines.txt
+done
+
+cat coverage-data.txt
+
+echo "Commits introducing uncovered code:"
+
+commit_list=$(cat coverage-data.txt |
+ grep -E '^[0-9a-f]{7,} ' |
+ awk '{print $1;}' |
+ sort |
+ uniq)
+
+(
+ for commit in $commit_list
+ do
+ git log --no-decorate --pretty=format:'%an %h: %s' -1 $commit
+ echo
+ done
+) | sort
+
+rm coverage-data.txt