func init() {
var err error
defaultDiffOptions, err = git2go.DefaultDiffOptions()
if err != nil {
log.Fatalf("Failed to load default git (libgit2/git2go) diff options: %s.", err)
}
defaultDiffOptions.IdAbbrev = 40
}
// FindFiles returns a list of paths to files that have been changed
// in this branch with respect to `master`.
func (r *Reviewer) FindFiles() ([]string, error) {
var (
rg runGuard
lines []string
mBranch *gg.Branch
hRef *gg.Reference
hCom *gg.Commit
mCom *gg.Commit
mTree *gg.Tree
hTree *gg.Tree
opts gg.DiffOptions
diff *gg.Diff
)
if r.Repo == nil {
return lines, errors.New("repo not initialized")
}
defer func() {
objs := [...]freeable{
mBranch,
hRef,
hCom,
mCom,
mTree,
hTree,
}
for _, obj := range objs {
if obj != nil {
obj.Free()
}
}
if err := diff.Free(); err != nil && r.Verbose {
fmt.Printf("Issue cleaning up diff: '%s'\n", err)
}
}()
rg.maybeRun(func() {
var err error
if mBranch, err = r.Repo.LookupBranch("master", gg.BranchLocal); err != nil {
rg.err = err
rg.msg = "issue opening master branch"
}
})
rg.maybeRun(func() {
var err error
if mCom, err = r.Repo.LookupCommit(mBranch.Reference.Target()); err != nil {
rg.err = err
rg.msg = "issue opening commit at master"
}
})
rg.maybeRun(func() {
var err error
if hRef, err = r.Repo.Head(); err != nil {
rg.err = err
rg.msg = "issue opening repo at HEAD"
}
})
rg.maybeRun(func() {
var err error
if hCom, err = r.Repo.LookupCommit(hRef.Target()); err != nil {
rg.err = err
rg.msg = "issue opening commit at HEAD"
}
})
rg.maybeRun(func() {
var err error
if mTree, err = mCom.Tree(); err != nil {
rg.err = err
rg.msg = "issue opening tree at master"
}
})
rg.maybeRun(func() {
var err error
if hTree, err = hCom.Tree(); err != nil {
rg.err = err
rg.msg = "issue opening tree at HEAD"
}
})
rg.maybeRun(func() {
var err error
if opts, err = gg.DefaultDiffOptions(); err != nil {
rg.err = err
rg.msg = "issue creating diff options"
}
})
rg.maybeRun(func() {
var err error
if diff, err = r.Repo.DiffTreeToTree(mTree, hTree, &opts); err != nil {
rg.err = err
rg.msg = "issue finding diff"
}
})
rg.maybeRun(func() {
diff.ForEach(func(file gg.DiffDelta, progress float64) (
gg.DiffForEachHunkCallback, error) {
lines = append(lines, file.OldFile.Path)
return nil, nil
}, gg.DiffDetailFiles)
})
if rg.err != nil && rg.msg != "" && r.Verbose {
fmt.Printf("Error finding diff files: '%s'\n", rg.msg)
}
return lines, rg.err
}