Update vendored tools/.

tools/vendor/github.com/alecthomas/gometalinter/partition.go

@@ -0,0 +1,131 @@
+package main
+
+import (
+	"fmt"
+	"path/filepath"
+)
+
+// MaxCommandBytes is the maximum number of bytes used when executing a command
+const MaxCommandBytes = 32000
+
+type partitionStrategy func([]string, []string) ([][]string, error)
+
+func pathsToFileGlobs(paths []string) ([]string, error) {
+	filePaths := []string{}
+	for _, dir := range paths {
+		paths, err := filepath.Glob(filepath.Join(dir, "*.go"))
+		if err != nil {
+			return nil, err
+		}
+		filePaths = append(filePaths, paths...)
+	}
+	return filePaths, nil
+}
+
+func partitionToMaxArgSize(cmdArgs []string, paths []string) ([][]string, error) {
+	return partitionToMaxSize(cmdArgs, paths, MaxCommandBytes), nil
+}
+
+func partitionToMaxSize(cmdArgs []string, paths []string, maxSize int) [][]string {
+	partitions := newSizePartitioner(cmdArgs, maxSize)
+	for _, path := range paths {
+		partitions.add(path)
+	}
+	return partitions.end()
+}
+
+type sizePartitioner struct {
+	base    []string
+	parts   [][]string
+	current []string
+	size    int
+	max     int
+}
+
+func newSizePartitioner(base []string, max int) *sizePartitioner {
+	p := &sizePartitioner{base: base, max: max}
+	p.new()
+	return p
+}
+
+func (p *sizePartitioner) add(arg string) {
+	if p.size+len(arg)+1 > p.max {
+		p.new()
+	}
+	p.current = append(p.current, arg)
+	p.size += len(arg) + 1
+}
+
+func (p *sizePartitioner) new() {
+	p.end()
+	p.size = 0
+	p.current = []string{}
+	for _, arg := range p.base {
+		p.add(arg)
+	}
+}
+
+func (p *sizePartitioner) end() [][]string {
+	if len(p.current) > 0 {
+		p.parts = append(p.parts, p.current)
+	}
+	return p.parts
+}
+
+func partitionToMaxArgSizeWithFileGlobs(cmdArgs []string, paths []string) ([][]string, error) {
+	filePaths, err := pathsToFileGlobs(paths)
+	if err != nil || len(filePaths) == 0 {
+		return nil, err
+	}
+	return partitionToMaxArgSize(cmdArgs, filePaths)
+}
+
+func partitionToPackageFileGlobs(cmdArgs []string, paths []string) ([][]string, error) {
+	parts := [][]string{}
+	for _, path := range paths {
+		filePaths, err := pathsToFileGlobs([]string{path})
+		if err != nil {
+			return nil, err
+		}
+		if len(filePaths) == 0 {
+			continue
+		}
+		parts = append(parts, append(cmdArgs, filePaths...))
+	}
+	return parts, nil
+}
+
+func partitionToMaxArgSizeWithPackagePaths(cmdArgs []string, paths []string) ([][]string, error) {
+	packagePaths, err := pathsToPackagePaths(paths)
+	if err != nil || len(packagePaths) == 0 {
+		return nil, err
+	}
+	return partitionToMaxArgSize(cmdArgs, packagePaths)
+}
+
+func pathsToPackagePaths(paths []string) ([]string, error) {
+	packages := []string{}
+
+	for _, path := range paths {
+		pkg, err := packageNameFromPath(path)
+		if err != nil {
+			return nil, err
+		}
+		packages = append(packages, pkg)
+	}
+	return packages, nil
+}
+
+func packageNameFromPath(path string) (string, error) {
+	if !filepath.IsAbs(path) {
+		return path, nil
+	}
+	for _, gopath := range getGoPathList() {
+		rel, err := filepath.Rel(filepath.Join(gopath, "src"), path)
+		if err != nil {
+			continue
+		}
+		return rel, nil
+	}
+	return "", fmt.Errorf("%s not in GOPATH", path)
+}