contrib/coverage-diff.sh

   1 #!/bin/sh
   2
   3 # Usage: Run 'contrib/coverage-diff.sh <version1> <version2>' from source-root
   4 # after running
   5 #
   6 #     make coverage-test
   7 #     make coverage-report
   8 #
   9 # while checked out at <version2>. This script combines the *.gcov files
  10 # generated by the 'make' commands above with 'git diff <version1> <version2>'
  11 # to report new lines that are not covered by the test suite.
  12
  13 V1=$1
  14 V2=$2
  15
  16 diff_lines () {
  17         perl -e '
  18                 my $line_num;
  19                 while (<>) {
  20                         # Hunk header?  Grab the beginning in postimage.
  21                         if (/^@@ -\d+(?:,\d+)? \+(\d+)(?:,\d+)? @@/) {
  22                                 $line_num = $1;
  23                                 next;
  24                         }
  25
  26                         # Have we seen a hunk?  Ignore "diff --git" etc.
  27                         next unless defined $line_num;
  28
  29                         # Deleted line? Ignore.
  30                         if (/^-/) {
  31                                 next;
  32                         }
  33
  34                         # Show only the line number of added lines.
  35                         if (/^\+/) {
  36                                 print "$line_num\n";
  37                         }
  38                         # Either common context or added line appear in
  39                         # the postimage.  Count it.
  40                         $line_num++;
  41                 }
  42         '
  43 }
  44
  45 files=$(git diff --name-only "$V1" "$V2" -- \*.c)
  46
  47 # create empty file
  48 >coverage-data.txt
  49
  50 for file in $files
  51 do
  52         git diff "$V1" "$V2" -- "$file" |
  53         diff_lines |
  54         sort >new_lines.txt
  55
  56         if ! test -s new_lines.txt
  57         then
  58                 continue
  59         fi
  60
  61         hash_file=$(echo $file | sed "s/\//\#/")
  62
  63         if ! test -s "$hash_file.gcov"
  64         then
  65                 continue
  66         fi
  67
  68         sed -ne '/#####:/{
  69                         s/    #####://
  70                         s/:.*//
  71                         s/ //g
  72                         p
  73                 }' "$hash_file.gcov" |
  74         sort >uncovered_lines.txt
  75
  76         comm -12 uncovered_lines.txt new_lines.txt |
  77         sed -e 's/$/\)/' -e 's/^/ /' >uncovered_new_lines.txt
  78
  79         grep -q '[^[:space:]]' <uncovered_new_lines.txt &&
  80         echo $file >>coverage-data.txt &&
  81         git blame -s "$V2" -- "$file" |
  82         sed 's/\t//g' |
  83         grep -f uncovered_new_lines.txt >>coverage-data.txt &&
  84         echo >>coverage-data.txt
  85
  86         rm -f new_lines.txt uncovered_lines.txt uncovered_new_lines.txt
  87 done
  88
  89 cat coverage-data.txt
  90
  91 echo "Commits introducing uncovered code:"
  92
  93 commit_list=$(awk '/^[0-9a-f]{7,}/ { print $1 }' coverage-data.txt | sort -u)
  94
  95 (
  96         for commit in $commit_list
  97         do
  98                 git log --no-decorate --pretty=format:'%an      %h: %s' -1 $commit
  99                 echo
 100         done
 101 ) | sort
 102
 103 rm coverage-data.txt