-
Notifications
You must be signed in to change notification settings - Fork 342
/
lua.go
225 lines (210 loc) · 6.11 KB
/
lua.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
package actions
import (
"bytes"
"context"
"errors"
"fmt"
"net/http"
"net/http/httptest"
"time"
"github.com/Shopify/go-lua"
lualibs "github.com/treeverse/lakefs/pkg/actions/lua"
"github.com/treeverse/lakefs/pkg/actions/lua/lakefs"
luautil "github.com/treeverse/lakefs/pkg/actions/lua/util"
"github.com/treeverse/lakefs/pkg/auth"
"github.com/treeverse/lakefs/pkg/auth/model"
"github.com/treeverse/lakefs/pkg/graveler"
"github.com/treeverse/lakefs/pkg/logging"
)
type LuaHook struct {
HookBase
Script string
ScriptPath string
Args map[string]interface{}
}
func applyRecord(l *lua.State, actionName, hookID string, record graveler.HookRecord) {
parents := make([]string, len(record.Commit.Parents))
for i := 0; i < len(record.Commit.Parents); i++ {
parents[i] = string(record.Commit.Parents[i])
}
metadata := make(map[string]string, len(record.Commit.Metadata))
for k, v := range record.Commit.Metadata {
metadata[k] = v
}
luautil.DeepPush(l, map[string]interface{}{
"action_name": actionName,
"hook_id": hookID,
"run_id": record.RunID,
"pre_run_id": record.PreRunID,
"event_type": string(record.EventType),
"commit_id": record.CommitID.String(),
"branch_id": record.BranchID.String(),
"source_ref": record.SourceRef.String(),
"tag_id": record.TagID.String(),
"repository_id": record.RepositoryID.String(),
"storage_namespace": record.StorageNamespace.String(),
"commit": map[string]interface{}{
"message": record.Commit.Message,
"meta_range_id": record.Commit.MetaRangeID.String(),
"creation_date": record.Commit.CreationDate.Format(time.RFC3339),
"version": int(record.Commit.Version),
"metadata": metadata,
"parents": parents,
},
})
l.SetGlobal("action")
}
func injectHookContext(l *lua.State, ctx context.Context, user *model.User, endpoint *http.Server, args map[string]interface{}) {
l.PushString(user.Username)
l.SetGlobal("username")
luautil.DeepPush(l, args)
l.SetGlobal("args")
lakefs.OpenClient(l, ctx, user, endpoint)
}
type loggingBuffer struct {
buf *bytes.Buffer
ctx context.Context
}
func (l *loggingBuffer) WriteString(s string) (n int, err error) {
logging.FromContext(l.ctx).WithField("hook_driver", "lua").WithField("hook_output", s).Trace("lua output captured")
return l.buf.WriteString(s)
}
func (h *LuaHook) Run(ctx context.Context, record graveler.HookRecord, buf *bytes.Buffer) error {
user, err := auth.GetUser(ctx)
if err != nil {
return err
}
l := lua.NewState()
lualibs.OpenSafe(l, ctx, &loggingBuffer{buf: buf, ctx: ctx})
injectHookContext(l, ctx, user, h.Endpoint, h.Args)
applyRecord(l, h.ActionName, h.ID, record)
// determine if this is an object to load
code := h.Script
if h.ScriptPath != "" {
// load file
if h.Endpoint == nil {
return fmt.Errorf("no endpoint configured, cannot request object: %s: %w", h.ScriptPath, ErrInvalidAction)
}
url := fmt.Sprintf("/api/v1/repositories/%s/refs/%s/objects", record.RepositoryID, record.SourceRef)
req, err := http.NewRequest(http.MethodGet, url, nil)
if err != nil {
return err
}
req = req.WithContext(auth.WithUser(req.Context(), user))
q := req.URL.Query()
q.Add("path", h.ScriptPath)
req.URL.RawQuery = q.Encode()
rr := httptest.NewRecorder()
h.Endpoint.Handler.ServeHTTP(rr, req)
if rr.Code != http.StatusOK {
return fmt.Errorf("could not load script_path %s: HTTP %d: %w", h.ScriptPath, rr.Code, ErrInvalidAction)
}
code = rr.Body.String()
}
err = LuaRun(l, code, "lua")
return err
}
func LuaRun(l *lua.State, code, name string) error {
var mode string
if err := lua.LoadBuffer(l, code, name, mode); err != nil {
return err
}
return l.ProtectedCall(0, lua.MultipleReturns, 0)
}
func DescendArgs(args interface{}) (descended interface{}, err error) {
switch t := args.(type) {
case Properties:
for k, v := range t {
t[k], err = DescendArgs(v)
if err != nil {
return
}
}
return t, nil
case map[string]interface{}:
for k, v := range t {
t[k], err = DescendArgs(v)
if err != nil {
return
}
}
return t, nil
case string:
secure, secureErr := NewSecureString(t)
if secureErr != nil {
return t, secureErr
}
return secure.val, nil
case []string:
stuff := make([]interface{}, len(t))
for i, e := range t {
stuff[i], err = DescendArgs(e)
}
return stuff, err
case []interface{}:
stuff := make([]interface{}, len(t))
for i, e := range t {
stuff[i], err = DescendArgs(e)
}
return stuff, err
default:
return args, nil
}
}
func NewLuaHook(h ActionHook, action *Action, e *http.Server) (Hook, error) {
// optional args
args := make(map[string]interface{})
argsVal, hasArgs := h.Properties["args"]
if hasArgs {
switch typedArgs := argsVal.(type) {
case Properties:
for k, v := range typedArgs {
args[k] = v
}
case map[string]interface{}:
args = typedArgs
default:
return nil, fmt.Errorf("'args' should be a map: %w", errWrongValueType)
}
}
parsedArgs, err := DescendArgs(args)
if err != nil {
return &LuaHook{}, fmt.Errorf("error parsing args: %w", err)
}
args, ok := parsedArgs.(map[string]interface{})
if !ok {
return &LuaHook{}, fmt.Errorf("error parsing args, got wrong type: %T: %w", parsedArgs, ErrInvalidAction)
}
// script or script_ath
script, err := h.Properties.getRequiredProperty("script")
if err == nil {
return &LuaHook{
HookBase: HookBase{
ID: h.ID,
ActionName: action.Name,
Endpoint: e,
},
Script: script,
Args: args,
}, nil
} else if !errors.Is(err, errMissingKey) {
// 'script' was provided but is empty or of the wrong type..
return nil, err
}
// no script provided, let's see if we have a script path
scriptFile, err := h.Properties.getRequiredProperty("script_path")
if err != nil && errors.Is(err, errMissingKey) {
return nil, fmt.Errorf("'script' or 'script_path' must be supplied: %w", errWrongValueType)
} else if err != nil {
return nil, err
}
return &LuaHook{
HookBase: HookBase{
ID: h.ID,
ActionName: action.Name,
Endpoint: e,
},
ScriptPath: scriptFile,
Args: args,
}, nil
}