/
runtime.go
347 lines (289 loc) · 6.6 KB
/
runtime.go
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package runtime
import (
"fmt"
"log"
"os"
"encoding/json"
"github.com/cloudson/git2go"
"github.com/cloudson/gitql/parser"
"github.com/cloudson/gitql/semantical"
"github.com/olekukonko/tablewriter"
)
const (
WALK_COMMITS = 1
WALK_REFERENCES = 2
WALK_REMOTES = 3
)
const (
REFERENCE_TYPE_BRANCH = "branch"
REFERENCE_TYPE_REMOTE = "remote"
REFERENCE_TYPE_TAG = "tag"
)
const (
COUNT_FIELD_NAME = "count"
)
var repo *git.Repository
var builder *GitBuilder
var boolRegister bool
type tableRow map[string]interface{}
type proxyTable struct {
table string
fields map[string]string
}
type GitBuilder struct {
tables map[string]string
possibleTables map[string][]string
proxyTables map[string]*proxyTable
repo *git.Repository
currentWalkType uint8
currentCommit *git.Commit
currentReference *git.Reference
currentRemote *git.Remote
walk *git.RevWalk
}
type RuntimeError struct {
code uint8
message string
}
type RuntimeVisitor struct {
semantical.Visitor
}
type TableData struct {
rows []tableRow
fields []string
}
// =========================== Error
func (e *RuntimeError) Error() string {
return e.message
}
func throwRuntimeError(message string, code uint8) *RuntimeError {
e := new(RuntimeError)
e.message = message
e.code = code
return e
}
// =========================== Runtime
func Run(n *parser.NodeProgram, typeFormat *string) error {
builder = GetGitBuilder(n.Path)
visitor := new(RuntimeVisitor)
err := visitor.Visit(n)
if err != nil {
return err
}
var tableData *TableData
switch findWalkType(n) {
case WALK_COMMITS:
tableData, err = walkCommits(n, visitor)
break
case WALK_REFERENCES:
tableData, err = walkReferences(n, visitor)
break
case WALK_REMOTES:
tableData, err = walkRemotes(n, visitor)
break
}
if err != nil {
return err
}
if *typeFormat == "json" {
printJson(tableData)
} else {
printTable(tableData)
}
return nil
}
func findWalkType(n *parser.NodeProgram) uint8 {
s := n.Child.(*parser.NodeSelect)
switch s.Tables[0] {
case "commits":
builder.currentWalkType = WALK_COMMITS
case "remotes":
builder.currentWalkType = WALK_REMOTES
case "refs", "tags", "branches":
builder.currentWalkType = WALK_REFERENCES
}
return builder.currentWalkType
}
func printTable(tableData *TableData) {
table := tablewriter.NewWriter(os.Stdout)
table.SetAutoFormatHeaders(false)
table.SetHeader(tableData.fields)
table.SetRowLine(true)
for _, row := range tableData.rows {
rowData := make([]string, len(tableData.fields))
for i, field := range tableData.fields {
rowData[i] = fmt.Sprintf("%v", row[field])
}
table.Append(rowData)
}
table.Render()
}
func printJson(tableData *TableData) error {
res, err := json.Marshal(tableData.rows)
if err != nil {
return throwRuntimeError(fmt.Sprintf("Json error:'%s'", err), 0)
} else {
fmt.Println(string(res))
}
return nil
}
func orderTable(rows []tableRow, order *parser.NodeOrder) ([]tableRow, error) {
if order == nil {
return rows, nil
}
// We will use parser.NodeGreater.Assertion(A, B) to know if
// A > B and then switch their positions.
// Unfortunaly, we will use bubble sort, that is O(n²)
// @todo change to quick or other better sort.
var orderer parser.NodeExpr
if order.Asc {
orderer = new(parser.NodeGreater)
} else {
orderer = new(parser.NodeSmaller)
}
field := order.Field
key := ""
for key, _ = range builder.tables {
break
}
table := key
err := builder.UseFieldFromTable(field, table)
if err != nil {
return nil, err
}
for i, row := range rows {
for j, rowWalk := range rows {
if orderer.Assertion(fmt.Sprintf("%v", rowWalk[field]), fmt.Sprintf("%v", row[field])) {
aux := rows[j]
rows[j] = rows[i]
rows[i] = aux
}
}
}
return rows, nil
}
func metadata(identifier string) string {
switch builder.currentWalkType {
case WALK_COMMITS:
return metadataCommit(identifier, builder.currentCommit)
case WALK_REFERENCES:
return metadataReference(identifier, builder.currentReference)
case WALK_REMOTES:
return metadataRemote(identifier, builder.currentRemote)
}
log.Fatalln("GOD!")
return ""
}
// =================== GitBuilder
func GetGitBuilder(path *string) *GitBuilder {
gb := new(GitBuilder)
gb.tables = make(map[string]string)
possibleTables := PossibleTables()
gb.possibleTables = possibleTables
proxyTables := map[string]*proxyTable{
"tags": proxyTableEntry("refs", map[string]string{"type": "tag"}),
"branches": proxyTableEntry("refs", map[string]string{"type": "branch"}),
}
gb.proxyTables = proxyTables
openRepository(path)
gb.repo = repo
return gb
}
func proxyTableEntry(t string, f map[string]string) *proxyTable {
p := new(proxyTable)
p.table = t
p.fields = f
return p
}
func openRepository(path *string) {
_repo, err := git.OpenRepositoryExtended(*path)
if err != nil {
log.Fatalln(err)
}
repo = _repo
}
func (g *GitBuilder) setCommit(object *git.Commit) {
g.currentCommit = object
}
func (g *GitBuilder) setReference(object *git.Reference) {
g.currentReference = object
}
func (g *GitBuilder) setRemote(object *git.Remote) {
g.currentRemote = object
}
func (g *GitBuilder) WithTable(tableName string, alias string) error {
err := g.isValidTable(tableName)
if err != nil {
return err
}
if g.possibleTables[tableName] == nil {
return throwRuntimeError(fmt.Sprintf("Table '%s' not found", tableName), 0)
}
if alias == "" {
alias = tableName
}
g.tables[alias] = tableName
return nil
}
func (g *GitBuilder) isProxyTable(tableName string) bool {
_, isIn := g.proxyTables[tableName]
return isIn
}
func PossibleTables() map[string][]string {
return map[string][]string{
"commits": {
"hash",
"date",
"author",
"author_email",
"committer",
"committer_email",
"message",
"full_message",
},
"refs": {
"name",
"full_name",
"type",
"hash",
},
"remotes": {
"name",
"url",
"push_url",
"owner",
},
"tags": {
"name",
"full_name",
"hash",
},
"branches": {
"name",
"full_name",
"hash",
},
}
}
func (g *GitBuilder) isValidTable(tableName string) error {
if _, isOk := g.possibleTables[tableName]; !isOk {
return throwRuntimeError(fmt.Sprintf("Table '%s' not found", tableName), 0)
}
return nil
}
func (g *GitBuilder) UseFieldFromTable(field string, tableName string) error {
err := g.isValidTable(tableName)
if err != nil {
return err
}
if field == "*" {
return nil
}
table := g.possibleTables[tableName]
for _, t := range table {
if t == field {
return nil
}
}
return throwRuntimeError(fmt.Sprintf("Table '%s' has not field '%s'", tableName, field), 0)
}