#!/usr/bin/env tclsh
#
# NGLFAR2CCOV, translate Nagelfar coverage result for Codecov report
# Copyright (C) 2017-2023 Xavier Delaruelle
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

##########################################################################

set usage "Usage: $argv0 source_file
Translate Nagelfar coverage result for Codecov report"

# parse command-line arguments
set srcfile [lindex $argv 0]
if {![llength $argv] || $srcfile eq "-h" || $srcfile eq "--help"} {
   puts stderr $usage
   exit 0
} elseif {[llength $argv] > 1} {
   puts stderr $usage
   exit 1
}

# read nagelfar coverage result
set covres "${srcfile}_log"
if {[catch {
   set fid [open $covres r]
   set fdata [split [read $fid] "\n"]
   close $fid
} errMsg ]} {
   puts stderr "Nagelfar coverage log '$covres' cannot be read.\n$errMsg"
   exit 1
}

# determine source file name to report coverage against
if {[file exists "${srcfile}.in"]} {
   set targetfile "${srcfile}.in"
} else {
   set targetfile $srcfile
}

# parse coverage result
array set line_hits {}
set covered_lines 0
foreach fline $fdata {
   if {[regexp {^incr ::_instrument_::log\((.*),(\d+)\) (\d+)$} \
      $fline match fname num hit] == 1} {
      if {[file tail $fname] eq [file tail $srcfile]} {
         set line_hits($num) $hit
         if {$hit > 0} {
            incr covered_lines
         }
      }
   }
}
set total_lines [array size line_hits]
set ratio_covered [format "%.4f" \
   [expr {double($covered_lines) / $total_lines}]]
set percent_covered [format "%.2f" [expr {100 * $ratio_covered}]]

puts "Found $covered_lines lines covered over $total_lines ($percent_covered\
   %)"

# catch additional information to build reports
set fmtime [file mtime $covres]
set fmtime_date [clock format $fmtime -format "%Y-%m-%d %H:%M:%S"]
regsub -all "\\." $targetfile "_" srcname

# build json report content
array set content {}
set content(json) "{
   \"files\": \[
      {\"file\": \"$targetfile\", \"percent_covered\": \"$percent_covered\",\
      \"covered_lines\": \"$covered_lines\", \"total_lines\":\
      \"$total_lines\"}
   \],
   \"percent_covered\": \"$percent_covered\",
   \"covered_lines\": $covered_lines,
   \"total_lines\": $total_lines,
   \"percent_low\": 25,
   \"percent_high\": 75,
   \"command\": \"$targetfile\",
   \"date\": \"$fmtime_date\"
}"

# build xml report content
set content(xml) "<?xml version=\"1.0\" ?>
<!DOCTYPE coverage SYSTEM\
   'http://cobertura.sourceforge.net/xml/coverage-03.dtd'>
<coverage line-rate=\"0.000\" version=\"1.9\" timestamp=\"$fmtime\">
   <sources>
      <source>$targetfile</source>
   </sources>
   <packages>
      <package name=\"$srcname\" line-rate=\"0.000\" branch-rate=\"1.0\"\
         complexity=\"1.0\">
         <classes>
            <class name=\"$srcname\" filename=\"$targetfile\"\
               line-rate=\"$ratio_covered\">
               <lines>
"
foreach n [lsort -integer [array names line_hits]] {
   append content(xml) "                  <line number=\"$n\"\
      hits=\"$line_hits($n)\"/>\n"
}
append content(xml) "               </lines>
            </class>
         </classes>
      </package>
   </packages>
</coverage>"

# write reports
set reportdir "coverage/$targetfile"
if {[catch {file mkdir $reportdir} errMsg ]} {
   puts stderr "Report directory '$reportdir' cannot be created.\n$errMsg"
   exit 1
}

array set report {}
set report(json) "$reportdir/coverage.json"
set report(xml) "$reportdir/cobertura.xml"

foreach t [list "json" "xml"] {
   puts "Writing coverage report '$report($t)'"
   if {[catch {
      set fid [open $report($t) w]
      puts $fid $content($t)
      close $fid
   } errMsg ]} {
      puts stderr "Report '$report($t)' cannot be written.\n$errMsg"
      exit 1
   }
}

exit 0

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