package arvados
import (
+ "log"
"os"
- "sync"
- "time"
+ "strings"
)
-type staleChecker struct {
- mtx sync.Mutex
- last time.Time
+func (fs *customFileSystem) defaultUUID(uuid string) (string, error) {
+ if uuid != "" {
+ return uuid, nil
+ }
+ var resp User
+ err := fs.RequestAndDecode(&resp, "GET", "arvados/v1/users/current", nil, nil)
+ if err != nil {
+ return "", err
+ }
+ return resp.UUID, nil
}
-func (sc *staleChecker) DoIfStale(fn func(), staleFunc func(time.Time) bool) {
- sc.mtx.Lock()
- defer sc.mtx.Unlock()
- if !staleFunc(sc.last) {
- return
+// loadOneChild loads only the named child, if it exists.
+func (fs *customFileSystem) projectsLoadOne(parent inode, uuid, name string) (inode, error) {
+ uuid, err := fs.defaultUUID(uuid)
+ if err != nil {
+ return nil, err
}
- sc.last = time.Now()
- fn()
-}
-// projectnode exposes an Arvados project as a filesystem directory.
-type projectnode struct {
- inode
- staleChecker
- uuid string
- err error
-}
+ var contents CollectionList
+ err = fs.RequestAndDecode(&contents, "GET", "arvados/v1/groups/"+uuid+"/contents", nil, ResourceListParams{
+ Count: "none",
+ Filters: []Filter{
+ {"name", "=", name},
+ {"uuid", "is_a", []string{"arvados#collection", "arvados#group"}},
+ {"groups.group_class", "=", "project"},
+ },
+ })
+ if err != nil {
+ return nil, err
+ }
+ if len(contents.Items) == 0 {
+ return nil, os.ErrNotExist
+ }
+ coll := contents.Items[0]
-func (pn *projectnode) load() {
- fs := pn.FS().(*customFileSystem)
+ if strings.Contains(coll.UUID, "-j7d0g-") {
+ // Group item was loaded into a Collection var -- but
+ // we only need the Name and UUID anyway, so it's OK.
+ return fs.newProjectNode(parent, coll.Name, coll.UUID), nil
+ } else if strings.Contains(coll.UUID, "-4zz18-") {
+ return deferredCollectionFS(fs, parent, coll), nil
+ } else {
+ log.Printf("projectnode: unrecognized UUID in response: %q", coll.UUID)
+ return nil, ErrInvalidArgument
+ }
+}
- if pn.uuid == "" {
- var resp User
- pn.err = fs.RequestAndDecode(&resp, "GET", "arvados/v1/users/current", nil, nil)
- if pn.err != nil {
- return
- }
- pn.uuid = resp.UUID
+func (fs *customFileSystem) projectsLoadAll(parent inode, uuid string) ([]inode, error) {
+ uuid, err := fs.defaultUUID(uuid)
+ if err != nil {
+ return nil, err
}
- filters := []Filter{{"owner_uuid", "=", pn.uuid}}
+
+ var inodes []inode
+
+ // Note: the "filters" slice's backing array might be reused
+ // by append(filters,...) below. This isn't goroutine safe,
+ // but all accesses are in the same goroutine, so it's OK.
+ filters := []Filter{{"owner_uuid", "=", uuid}}
params := ResourceListParams{
+ Count: "none",
Filters: filters,
Order: "uuid",
}
for {
var resp CollectionList
- pn.err = fs.RequestAndDecode(&resp, "GET", "arvados/v1/collections", nil, params)
- if pn.err != nil {
- return
+ err = fs.RequestAndDecode(&resp, "GET", "arvados/v1/collections", nil, params)
+ if err != nil {
+ return nil, err
}
if len(resp.Items) == 0 {
break
}
for _, i := range resp.Items {
coll := i
- if coll.Name == "" || coll.Name == "." || coll.Name == ".." {
+ if !permittedName(coll.Name) {
continue
}
- pn.inode.Child(coll.Name, func(inode) (inode, error) {
- return deferredCollectionFS(fs, pn, coll), nil
- })
+ inodes = append(inodes, deferredCollectionFS(fs, parent, coll))
}
params.Filters = append(filters, Filter{"uuid", ">", resp.Items[len(resp.Items)-1].UUID})
}
params.Filters = filters
for {
var resp GroupList
- pn.err = fs.RequestAndDecode(&resp, "GET", "arvados/v1/groups", nil, params)
- if pn.err != nil {
- return
+ err = fs.RequestAndDecode(&resp, "GET", "arvados/v1/groups", nil, params)
+ if err != nil {
+ return nil, err
}
if len(resp.Items) == 0 {
break
}
for _, group := range resp.Items {
- if group.Name == "" || group.Name == "." || group.Name == ".." {
+ if !permittedName(group.Name) {
continue
}
- pn.inode.Child(group.Name, func(inode) (inode, error) {
- return fs.newProjectNode(pn, group.Name, group.UUID), nil
- })
+ inodes = append(inodes, fs.newProjectNode(parent, group.Name, group.UUID))
}
params.Filters = append(filters, Filter{"uuid", ">", resp.Items[len(resp.Items)-1].UUID})
}
- pn.err = nil
-}
-
-func (pn *projectnode) Readdir() ([]os.FileInfo, error) {
- pn.staleChecker.DoIfStale(pn.load, pn.FS().(*customFileSystem).Stale)
- if pn.err != nil {
- return nil, pn.err
- }
- return pn.inode.Readdir()
-}
-
-func (pn *projectnode) Child(name string, replace func(inode) (inode, error)) (inode, error) {
- pn.staleChecker.DoIfStale(pn.load, pn.FS().(*customFileSystem).Stale)
- if pn.err != nil {
- return nil, pn.err
- }
- if replace == nil {
- // lookup
- return pn.inode.Child(name, nil)
- }
- return pn.inode.Child(name, func(existing inode) (inode, error) {
- if repl, err := replace(existing); err != nil {
- return existing, err
- } else if repl == nil {
- if existing == nil {
- return nil, nil
- }
- // rmdir
- // (TODO)
- return existing, ErrInvalidArgument
- } else if existing != nil {
- // clobber
- return existing, ErrInvalidArgument
- } else if repl.FileInfo().IsDir() {
- // mkdir
- // TODO: repl.SetParent(pn, name), etc.
- return existing, ErrInvalidArgument
- } else {
- // create file
- return existing, ErrInvalidArgument
- }
- })
+ return inodes, nil
}