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selectcmd.go
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selectcmd.go
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// Copyright (C) 2017, 2018 Damon Revoe. All rights reserved.
// Use of this source code is governed by the MIT
// license, which can be found in the LICENSE file.
package main
import (
"log"
"os"
"path"
"strings"
"github.com/spf13/cobra"
)
func getRequired(pd *packageDefinition) packageDefinitionList {
return pd.required
}
func getDependent(pd *packageDefinition) packageDefinitionList {
return pd.dependent
}
func applyToSubtree(action func(*packageDefinition),
root *packageDefinition,
direction func(*packageDefinition) packageDefinitionList) {
queue := packageDefinitionList{root}
for {
pd := queue[0]
queue = queue[1:]
action(pd)
queue = append(queue, direction(pd)...)
if len(queue) == 0 {
break
}
}
}
func packageRangesToFlatSelection(pi *packageIndex, args []string) (
packageDefinitionList, error) {
selected := make(map[string]bool)
marked := make(map[string]int)
inclusion := true
selectPackage := func(pd *packageDefinition) {
selected[pd.PackageName] = inclusion
}
mark := 0
markPackage := func(pd *packageDefinition) {
marked[pd.PackageName] = mark
}
selectIfMarked := func(pd *packageDefinition) {
if marked[pd.PackageName] == mark {
selected[pd.PackageName] = inclusion
}
}
for _, arg := range args {
if arg == "+" {
inclusion = true
continue
}
if arg == "-" {
inclusion = false
continue
}
var pkgRange packageDefinitionList
emptyRange := true
for _, pkgName := range strings.SplitN(arg, ":", 2) {
var pd *packageDefinition
if pkgName != "" {
var err error
pd, err = pi.getPackageByName(pkgName)
if err != nil {
return nil, err
}
emptyRange = false
}
pkgRange = append(pkgRange, pd)
}
if emptyRange {
continue
}
if len(pkgRange) == 1 {
selected[arg] = inclusion
continue
}
from, to := pkgRange[0], pkgRange[1]
if from == nil {
applyToSubtree(selectPackage, to, getRequired)
} else if to == nil {
applyToSubtree(selectPackage, from, getDependent)
} else {
mark++
applyToSubtree(markPackage, to, getRequired)
applyToSubtree(selectIfMarked, from, getDependent)
}
}
var selection packageDefinitionList
for _, pd := range pi.orderedPackages {
if selected[pd.PackageName] {
selection = append(selection, pd)
}
}
return selection, nil
}
func selectPackages(args []string) error {
ws, err := loadWorkspace()
if err != nil {
return err
}
pi, err := readPackageDefinitions(ws.wp)
if err != nil {
return err
}
selection, err := packageRangesToFlatSelection(pi, args)
if err != nil {
return err
}
conftab, err := readConftab(path.Join(ws.absPrivateDir,
conftabFilename))
if err != nil {
if !os.IsNotExist(err) {
return err
}
conftab = newConftab()
}
return generateAndBootstrapPackages(ws, pi, selection, conftab)
}
// selectCmd represents the select command
var selectCmd = &cobra.Command{
Use: "select package_range...",
Short: "Choose one or more packages to work on",
Args: cobra.MinimumNArgs(1),
Run: func(_ *cobra.Command, args []string) {
if err := selectPackages(args); err != nil {
log.Fatal(err)
}
},
}
func init() {
rootCmd.AddCommand(selectCmd)
selectCmd.Flags().SortFlags = false
addQuietFlag(selectCmd)
addPkgPathFlag(selectCmd)
addWorkspaceDirFlag(selectCmd)
addNoBootstrapFlag(selectCmd)
}