codeclimate/test-reporter

package xccov

import (
    "encoding/json"
    "os"
    "strings"

    "github.com/Sirupsen/logrus"
    "github.com/codeclimate/test-reporter/env"
    "github.com/codeclimate/test-reporter/formatters"
    "github.com/pkg/errors"
)

var searchPaths = []string{"coverage.json"}

type Formatter struct {
    Path string
}

func (f *Formatter) Search(paths ...string) (string, error) {
    paths = append(paths, searchPaths...)
    for _, p := range paths {
        logrus.Debugf("checking search path %s for xccov formatter", p)
        if _, err := os.Stat(p); err == nil {
            f.Path = p
            return p, nil
        }
    }

    return "", errors.WithStack(errors.Errorf("could not find any files in search paths for xccov. search paths were: %s", strings.Join(paths, ", ")))
}

func (r Formatter) Format() (formatters.Report, error) {
    report, err := formatters.NewReport()
    if err != nil {
        return report, err
    }

    inputXccovFile, err := os.Open(r.Path)
    if err != nil {
        return report, errors.WithStack(errors.Errorf("could not open coverage file %s", r.Path))
    }

    covFile := &xccovFile{}
    err = json.NewDecoder(inputXccovFile).Decode(&covFile)
    if err != nil {
        return report, errors.WithStack(err)
    }

    gitHead, _ := env.GetHead()
    for _, target := range covFile.Targets {
        for _, jsonFile := range target.Files {
            num := 1
            sourceFile, err := formatters.NewSourceFile(jsonFile.Path, gitHead)
            if err != nil {
                logrus.Warnf("Couldn't find file for path \"%s\" from %s coverage data. Ignore if the path doesn't correspond to an existent file in your repo.", jsonFile.Path, r.Path)
                continue
            }

            for _, function := range jsonFile.Functions {
                // fill non executable lines will null
                for num < function.LineNumber {
                    sourceFile.Coverage = append(sourceFile.Coverage, formatters.NullInt{})
                    num++
                }
                // fill covered lines with 1
                for i := 0; i < function.CoveredLines; i++ {
                    sourceFile.Coverage = append(sourceFile.Coverage, formatters.NewNullInt(1))
                    num++
                }
                // fill non-covered but executable lines with 0
                nonExecutableLines := function.ExecutableLines - function.CoveredLines
                for i := 0; i < nonExecutableLines; i++ {
                    sourceFile.Coverage = append(sourceFile.Coverage, formatters.NewNullInt(0))
                    num++
                }
            }

            err = report.AddSourceFile(sourceFile)
            if err != nil {
                return report, errors.WithStack(err)
            }
        }
    }


    return report, nil
}