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Merge pull request #63 from augmentable-dev/git_stats_libgit2
Git stats libgit2
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| package gitqlite | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
|
|
||
| git "github.com/libgit2/git2go/v30" | ||
| "github.com/mattn/go-sqlite3" | ||
| ) | ||
|
|
||
| type gitStatsModule struct{} | ||
|
|
||
| type gitStatsTable struct { | ||
| repoPath string | ||
| repo *git.Repository | ||
| } | ||
|
|
||
| func (m *gitStatsModule) Create(c *sqlite3.SQLiteConn, args []string) (sqlite3.VTab, error) { | ||
| err := c.DeclareVTab(fmt.Sprintf(` | ||
| CREATE TABLE %q ( | ||
| commit_id TEXT, | ||
| file TEXT, | ||
| additions INT, | ||
| deletions INT | ||
| )`, args[0])) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // the repoPath will be enclosed in double quotes "..." since ensureTables uses %q when setting up the table | ||
| // we need to pop those off when referring to the actual directory in the fs | ||
| repoPath := args[3][1 : len(args[3])-1] | ||
| return &gitStatsTable{repoPath: repoPath}, nil | ||
| } | ||
|
|
||
| func (m *gitStatsModule) Connect(c *sqlite3.SQLiteConn, args []string) (sqlite3.VTab, error) { | ||
| return m.Create(c, args) | ||
| } | ||
|
|
||
| func (m *gitStatsModule) DestroyModule() {} | ||
|
|
||
| func (v *gitStatsTable) Open() (sqlite3.VTabCursor, error) { | ||
| repo, err := git.OpenRepository(v.repoPath) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| v.repo = repo | ||
|
|
||
| return &StatsCursor{repo: v.repo}, nil | ||
| } | ||
|
|
||
| func (v *gitStatsTable) BestIndex(cst []sqlite3.InfoConstraint, ob []sqlite3.InfoOrderBy) (*sqlite3.IndexResult, error) { | ||
| used := make([]bool, len(cst)) | ||
| // TODO implement an index for file name glob patterns? | ||
| // TODO this loop construct won't work well for multiple constraints... | ||
| for c, constraint := range cst { | ||
| switch { | ||
| case constraint.Usable && constraint.Column == 0 && constraint.Op == sqlite3.OpEQ: | ||
| used[c] = true | ||
| return &sqlite3.IndexResult{Used: used, IdxNum: 1, IdxStr: "stats-by-commit-id", EstimatedCost: 1.0, EstimatedRows: 1}, nil | ||
| } | ||
| } | ||
|
|
||
| return &sqlite3.IndexResult{Used: used, EstimatedCost: 100}, nil | ||
| } | ||
|
|
||
| func (v *gitStatsTable) Disconnect() error { | ||
| v.repo = nil | ||
| return nil | ||
| } | ||
| func (v *gitStatsTable) Destroy() error { return nil } | ||
|
|
||
| type StatsCursor struct { | ||
| repo *git.Repository | ||
| iterator *commitStatsIter | ||
| current *commitStat | ||
| } | ||
|
|
||
| func (vc *StatsCursor) Column(c *sqlite3.SQLiteContext, col int) error { | ||
| stat := vc.current | ||
| switch col { | ||
| case 0: | ||
| //commit id | ||
| c.ResultText(stat.commitID) | ||
| case 1: | ||
| c.ResultText(stat.file) | ||
| case 2: | ||
| c.ResultInt(stat.additions) | ||
| case 3: | ||
| c.ResultInt(stat.deletions) | ||
|
|
||
| } | ||
|
|
||
| return nil | ||
| } | ||
| func (vc *StatsCursor) Filter(idxNum int, idxStr string, vals []interface{}) error { | ||
| var opt *commitStatsIterOptions | ||
|
|
||
| switch idxNum { | ||
| case 0: | ||
| opt = &commitStatsIterOptions{} | ||
| case 1: | ||
| opt = &commitStatsIterOptions{commitID: vals[0].(string)} | ||
| } | ||
|
|
||
| iter, err := NewCommitStatsIter(vc.repo, opt) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| vc.iterator = iter | ||
|
|
||
| file, err := vc.iterator.Next() | ||
| if err != nil { | ||
| if err == io.EOF { | ||
| vc.current = nil | ||
| return nil | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| vc.current = file | ||
| return nil | ||
| } | ||
|
|
||
| func (vc *StatsCursor) Next() error { | ||
| file, err := vc.iterator.Next() | ||
| if err != nil { | ||
| if err == io.EOF { | ||
| vc.current = nil | ||
| return nil | ||
| } | ||
| return err | ||
| } | ||
| vc.current = file | ||
| return nil | ||
| } | ||
|
|
||
| func (vc *StatsCursor) EOF() bool { | ||
| return vc.current == nil | ||
| } | ||
|
|
||
| func (vc *StatsCursor) Rowid() (int64, error) { | ||
| return int64(0), nil | ||
| } | ||
|
|
||
| func (vc *StatsCursor) Close() error { | ||
| vc.iterator.Close() | ||
| return nil | ||
| } |
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