diff --git a/Gopkg.lock b/Gopkg.lock
index f407cb5..6cd7188 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -11,7 +11,7 @@
   branch = "master"
   name = "github.com/Xe/eclier"
   packages = ["."]
-  revision = "b586327df9d5a5e5023fa1338f44941745136d68"
+  revision = "0348e605dd81108be0380a581f237d6c77e088fa"
 
 [[projects]]
   branch = "master"
@@ -358,7 +358,7 @@
     "hcldec",
     "hclparse"
   ]
-  revision = "83451bb547db5e521b21cdf02fc0018c5790f6d5"
+  revision = "613331e829930a2321c1de7227c9483d9c76c3f4"
 
 [[projects]]
   branch = "master"
@@ -956,6 +956,12 @@
   packages = ["."]
   revision = "d670f9405373e636a5a2765eea47fac0c9bc91a4"
 
+[[projects]]
+  branch = "master"
+  name = "layeh.com/asar"
+  packages = ["."]
+  revision = "0ec214a4ae0d21fa761591e8cb8f0bbf162ef3e5"
+
 [[projects]]
   branch = "master"
   name = "layeh.com/gopher-json"
@@ -971,6 +977,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "04d2f396a00556d6fd4651d3af551eb832ea69ff3c2ba78a5e345a494d5c2bf0"
+  inputs-digest = "5a2781494dfd7bbba13e0088752aa52bd2b2e0a9e384f44ee165e5e4aacb7dfd"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 8c5cdc6..a4ebaa7 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -19,6 +19,9 @@
 #  name = "github.com/x/y"
 #  version = "2.4.0"
 
+[[constraint]]
+  branch = "master"
+  name = "github.com/Xe/eclier"
 
 [[constraint]]
   branch = "master"
diff --git a/vendor/github.com/Xe/eclier/builtin.go b/vendor/github.com/Xe/eclier/builtin.go
index 3e63ca7..7b8fd4d 100644
--- a/vendor/github.com/Xe/eclier/builtin.go
+++ b/vendor/github.com/Xe/eclier/builtin.go
@@ -3,7 +3,6 @@ package eclier
 import (
 	"context"
 	"flag"
-	"fmt"
 )
 
 // Constants for built-in commands.
@@ -54,14 +53,17 @@ func (p *pluginCommand) Version() string { return BuiltinVersion }
 func (p *pluginCommand) Run(ctx context.Context, arg []string) error {
 	p.fs.Parse(arg)
 
+	table.SetHeader([]String{"Verb", "Path"})
+
 	for _, c := range p.r.cmds {
 		if c.ScriptPath() == BuiltinScriptPath && *p.dontShowBuiltin {
 			continue
 		}
 
-		fmt.Printf("%s\t%s\n", c.Verb(), c.ScriptPath())
+		table.Append([]string{c.Verb(), c.ScriptPath()})
 	}
 
+	table.Render()
 	return nil
 }
 
diff --git a/vendor/github.com/Xe/eclier/router.go b/vendor/github.com/Xe/eclier/router.go
index 0669dcd..7f9417a 100644
--- a/vendor/github.com/Xe/eclier/router.go
+++ b/vendor/github.com/Xe/eclier/router.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/olekukonko/tablewriter"
 	lua "github.com/yuin/gopher-lua"
+	"layeh.com/asar"
 )
 
 // Router is the main subcommand router for eclier. At a high level what this is
@@ -55,7 +56,6 @@ func NewRouter(opts ...RouterOption) (*Router, error) {
 				defer fin.Close()
 
 				c := newGluaCommand(r.gluaCreationHook, fname, fin)
-
 				r.cmds[c.Verb()] = c
 			}
 
@@ -138,3 +138,35 @@ func WithGluaCreationHook(hook func(*lua.LState)) RouterOption {
 		r.gluaCreationHook = hook
 	}
 }
+
+// WithAsarFile loads an asar file full of lua scripts into this eclier router.
+func WithAsarFile(shortName, fname string) RouterOption {
+	return func(r *Router) {
+		fin, err := os.Open(fname)
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer fin.Close()
+
+		e, err := asar.Decode(fin)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		err := e.Walk(func(path string, info os.FileInfo, err error) error {
+			if strings.HasSuffix(info.Name(), ".lua") {
+				fname := filepath.Join(shortName, "::", path)
+				fin := e.Find(path)
+				if fin == nil {
+					return nil
+				}
+
+				c = newGluaCommand(r.gluaCreationHook, fname, fin)
+				r.cmds[c.Verb()] = c
+			}
+		})
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+}
diff --git a/vendor/layeh.com/asar/.gitignore b/vendor/layeh.com/asar/.gitignore
new file mode 100644
index 0000000..85e7c1d
--- /dev/null
+++ b/vendor/layeh.com/asar/.gitignore
@@ -0,0 +1 @@
+/.idea/
diff --git a/vendor/layeh.com/asar/LICENSE b/vendor/layeh.com/asar/LICENSE
new file mode 100644
index 0000000..14e2f77
--- /dev/null
+++ b/vendor/layeh.com/asar/LICENSE
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in 
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
diff --git a/vendor/layeh.com/asar/README.md b/vendor/layeh.com/asar/README.md
new file mode 100644
index 0000000..289f5ec
--- /dev/null
+++ b/vendor/layeh.com/asar/README.md
@@ -0,0 +1,36 @@
+# asar [![GoDoc](https://godoc.org/layeh.com/asar?status.svg)](https://godoc.org/layeh.com/asar)
+
+Package asar reads and writes ASAR (Atom-Shell Archive) archives
+
+    import (
+        "os"
+
+        "layeh.com/asar"
+    )
+
+
+    f, err := os.Open("sample.asar")
+    if err != nil {
+        panic(err)
+    }
+    defer f.Close()
+
+    archive, err := asar.Decode(f)
+    if err != nil {
+        panic(err)
+    }
+
+    test := archive.Find("test", "file.txt")
+    if test == nil {
+        panic("file not found")
+    }
+    // print contents of test/file.txt in sample.asar
+    fmt.Println(test.String())
+
+## License
+
+MPL 2.0
+
+## Author
+
+Tim Cooper (tim.cooper@layeh.com)
diff --git a/vendor/layeh.com/asar/builder.go b/vendor/layeh.com/asar/builder.go
new file mode 100644
index 0000000..8f926af
--- /dev/null
+++ b/vendor/layeh.com/asar/builder.go
@@ -0,0 +1,80 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"io"
+	"strings"
+)
+
+// Builder helps construct an Entry.
+//
+// A builder keeps track of the root Entry and the active Entry. When entries
+// are added using the Add* methods, they are added as children to the active
+// Entry.
+type Builder struct {
+	root, current *Entry
+}
+
+// Root returns the root Entry.
+func (b *Builder) Root() *Entry {
+	return b.root
+}
+
+func (b *Builder) init() {
+	if b.root == nil {
+		b.root = &Entry{
+			Flags: FlagDir,
+		}
+		b.current = b.root
+	}
+}
+
+// Parent sets the active entry to the parent of the active Entry (i.e. moves up
+// a level).
+//
+// The function panics if called on the root Entry.
+func (b *Builder) Parent() *Builder {
+	if b.current == b.root {
+		panic("root has no parent")
+	}
+	b.current = b.current.Parent
+	return b
+}
+
+// AddString adds a new file Entry whose contents are the given string.
+func (b *Builder) AddString(name, contents string, flags Flag) *Builder {
+	return b.Add(name, strings.NewReader(contents), int64(len(contents)), flags)
+}
+
+// Add adds a new file Entry.
+func (b *Builder) Add(name string, ra io.ReaderAt, size int64, flags Flag) *Builder {
+	b.init()
+
+	child := &Entry{
+		Name:   name,
+		Size:   size,
+		Flags:  flags,
+		Parent: b.current,
+
+		r: ra,
+	}
+	b.current.Children = append(b.current.Children, child)
+
+	return b
+}
+
+// AddDir adds a new directory Entry. The active Entry is switched to this newly
+// added Entry.
+func (b *Builder) AddDir(name string, flags Flag) *Builder {
+	b.init()
+
+	child := &Entry{
+		Name:   name,
+		Flags:  flags | FlagDir,
+		Parent: b.current,
+	}
+
+	b.current.Children = append(b.current.Children, child)
+	b.current = child
+
+	return b
+}
diff --git a/vendor/layeh.com/asar/decoder.go b/vendor/layeh.com/asar/decoder.go
new file mode 100644
index 0000000..68d15a3
--- /dev/null
+++ b/vendor/layeh.com/asar/decoder.go
@@ -0,0 +1,64 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+)
+
+var (
+	errMalformed = errors.New("asar: malformed archive")
+)
+
+// Decode decodes the ASAR archive in ra.
+//
+// Returns the root element and nil on success. nil and an error is returned on
+// failure.
+func Decode(ra io.ReaderAt) (*Entry, error) {
+	headerSize := uint32(0)
+	headerStringSize := uint32(0)
+
+	// [pickle object header (4 bytes) == 4]
+	// [pickle uint32 = $header_object_size]
+	{
+		var buff [8]byte
+		if n, _ := ra.ReadAt(buff[:], 0); n != 8 {
+			return nil, errMalformed
+		}
+
+		dataSize := binary.LittleEndian.Uint32(buff[:4])
+		if dataSize != 4 {
+			return nil, errMalformed
+		}
+		headerSize = binary.LittleEndian.Uint32(buff[4:8])
+	}
+
+	// [pickle object header (4 bytes)]
+	// [pickle data header (4 bytes) == $string_size]
+	// [pickle string ($string_size bytes)]
+	{
+		var buff [8]byte
+		if n, _ := ra.ReadAt(buff[:], 8); n != 8 {
+			return nil, errMalformed
+		}
+
+		headerObjectSize := binary.LittleEndian.Uint32(buff[:4])
+		if headerObjectSize != headerSize-4 {
+			return nil, errMalformed
+		}
+
+		headerStringSize = binary.LittleEndian.Uint32(buff[4:8])
+	}
+
+	// read header string
+	headerSection := io.NewSectionReader(ra, 8+8, int64(headerStringSize))
+	baseOffset := 8 + int64(headerSize)
+	baseOffset += baseOffset % 4 // pickle objects are uint32 aligned
+
+	root, err := decodeHeader(ra, headerSection, baseOffset)
+	if err != nil {
+		return nil, err
+	}
+
+	return root, nil
+}
diff --git a/vendor/layeh.com/asar/decoder_test.go b/vendor/layeh.com/asar/decoder_test.go
new file mode 100644
index 0000000..8a0b517
--- /dev/null
+++ b/vendor/layeh.com/asar/decoder_test.go
@@ -0,0 +1,91 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestExtractThis(t *testing.T) {
+	f, err := os.Open("testdata/extractthis.asar")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	root, err := Decode(f)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if root.Flags&FlagDir == 0 {
+		t.Fatal("expecting root directory to have FlagDir")
+	}
+
+	{
+		f1 := root.Find("dir1", "file1.txt")
+		if f1 == nil {
+			t.Fatal("could not find dir1/file1.txt")
+		}
+		if f1.Path() != "dir1/file1.txt" {
+			t.Fatal("unexpected path")
+		}
+		body, err := ioutil.ReadAll(f1.Open())
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !bytes.Equal(body, []byte(`file one.`)) {
+			t.Fatalf("dir1/file1.txt body is incorrect (got %s)", body)
+		}
+	}
+
+	{
+		f2 := root.Find("dir2").Find("file3.txt")
+		if f2 == nil {
+			t.Fatal("could not find dir2/file3.txt")
+		}
+		s := f2.String()
+		if s != `123` {
+			t.Fatalf("dir2/file3.txt body is incorrect (got %s)", s)
+		}
+	}
+
+	{
+		empty := root.Find("emptyfile.txt")
+		if empty == nil {
+			t.Fatal("could not find emptyfile.txt")
+		}
+		if len(empty.Bytes()) != 0 {
+			t.Fatal("expecting emptyfile.txt to be empty")
+		}
+	}
+
+	{
+		var i int
+		root.Walk(func(_ string, _ os.FileInfo, _ error) error {
+			i++
+			return nil
+		})
+
+		if i != 7 {
+			t.Fatalf("expected to walk over 7 items, got %d", i)
+		}
+	}
+
+	{
+		var i int
+		root.Walk(func(_ string, fi os.FileInfo, _ error) error {
+			i++
+			if fi.IsDir() {
+				return filepath.SkipDir
+			}
+			return nil
+		})
+
+		if i != 4 {
+			t.Fatalf("expected to walk over 4 items, got %d", i)
+		}
+	}
+}
diff --git a/vendor/layeh.com/asar/doc.go b/vendor/layeh.com/asar/doc.go
new file mode 100644
index 0000000..199c7a6
--- /dev/null
+++ b/vendor/layeh.com/asar/doc.go
@@ -0,0 +1,2 @@
+// Package asar reads and writes ASAR (Atom-Shell Archive) archives.
+package asar // import "layeh.com/asar"
diff --git a/vendor/layeh.com/asar/encoder.go b/vendor/layeh.com/asar/encoder.go
new file mode 100644
index 0000000..70024a9
--- /dev/null
+++ b/vendor/layeh.com/asar/encoder.go
@@ -0,0 +1,122 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"bytes"
+	"encoding/binary"
+	"encoding/json"
+	"io"
+	"strconv"
+)
+
+type entryEncoder struct {
+	Contents      []io.Reader
+	CurrentOffset int64
+	Header        bytes.Buffer
+	Encoder       *json.Encoder
+}
+
+func (enc *entryEncoder) Write(v interface{}) {
+	enc.Encoder.Encode(v)
+	enc.Header.Truncate(enc.Header.Len() - 1) // cut off trailing new line
+}
+
+func (enc *entryEncoder) WriteField(key string, v interface{}) {
+	enc.Write(key)
+	enc.Header.WriteByte(':')
+	enc.Write(v)
+}
+
+func (enc *entryEncoder) Encode(e *Entry) error {
+	enc.Header.WriteByte('{')
+	if e.Flags&FlagDir != 0 {
+		enc.Write("files")
+		enc.Header.WriteString(":{")
+		for i, child := range e.Children {
+			if i > 0 {
+				enc.Header.WriteByte(',')
+			}
+			if !validFilename(child.Name) {
+				panic(errHeader)
+			}
+			enc.Write(child.Name)
+			enc.Header.WriteByte(':')
+			if err := enc.Encode(child); err != nil {
+				return err
+			}
+		}
+		enc.Header.WriteByte('}')
+	} else {
+		enc.Write("size")
+		enc.Header.WriteByte(':')
+		enc.Write(e.Size)
+
+		if e.Flags&FlagExecutable != 0 {
+			enc.Header.WriteByte(',')
+			enc.WriteField("executable", true)
+		}
+
+		enc.Header.WriteByte(',')
+		if e.Flags&FlagUnpacked == 0 {
+			enc.WriteField("offset", strconv.FormatInt(enc.CurrentOffset, 10))
+			enc.CurrentOffset += e.Size
+			enc.Contents = append(enc.Contents, io.NewSectionReader(e.r, e.baseOffset, e.Size))
+		} else {
+			enc.WriteField("unpacked", true)
+		}
+	}
+	enc.Header.WriteByte('}')
+	return nil
+}
+
+// EncodeTo writes an ASAR archive containing Entry's descendants. This function
+// is usally called on the root entry.
+func (e *Entry) EncodeTo(w io.Writer) (n int64, err error) {
+
+	defer func() {
+		if r := recover(); r != nil {
+			if e := r.(error); e != nil {
+				err = e
+			} else {
+				panic(r)
+			}
+		}
+
+	}()
+
+	encoder := entryEncoder{}
+	{
+		var reserve [16]byte
+		encoder.Header.Write(reserve[:])
+	}
+	encoder.Encoder = json.NewEncoder(&encoder.Header)
+	if err = encoder.Encode(e); err != nil {
+		return
+	}
+
+	{
+		var padding [3]byte
+		encoder.Header.Write(padding[:encoder.Header.Len()%4])
+	}
+
+	header := encoder.Header.Bytes()
+	binary.LittleEndian.PutUint32(header[:4], 4)
+	binary.LittleEndian.PutUint32(header[4:8], 8+uint32(encoder.Header.Len()))
+	binary.LittleEndian.PutUint32(header[8:12], 4+uint32(encoder.Header.Len()))
+	binary.LittleEndian.PutUint32(header[12:16], uint32(encoder.Header.Len()))
+
+	n, err = encoder.Header.WriteTo(w)
+	if err != nil {
+		return
+	}
+
+	for _, chunk := range encoder.Contents {
+		var written int64
+		written, err = io.Copy(w, chunk)
+		n += written
+		if err != nil {
+			return
+		}
+	}
+
+	return
+}
diff --git a/vendor/layeh.com/asar/encoder_test.go b/vendor/layeh.com/asar/encoder_test.go
new file mode 100644
index 0000000..cea51b2
--- /dev/null
+++ b/vendor/layeh.com/asar/encoder_test.go
@@ -0,0 +1,29 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"io/ioutil"
+	"strings"
+	"testing"
+)
+
+func TestEncodeInvalidName(t *testing.T) {
+	root := New(".", nil, 0, 0, FlagDir)
+	root.Children = append(
+		root.Children,
+		New(".", strings.NewReader("test"), 4, 0, FlagNone),
+	)
+	if _, err := root.EncodeTo(ioutil.Discard); err == nil {
+		t.Fatal("we should have had an error")
+	}
+}
+
+func TestEncodeUnpacked(t *testing.T) {
+	root := New(".", nil, 0, 0, FlagDir)
+	root.Children = append(
+		root.Children,
+		New("sample", nil, 0, 0, FlagUnpacked),
+	)
+	if _, err := root.EncodeTo(ioutil.Discard); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+}
diff --git a/vendor/layeh.com/asar/entry.go b/vendor/layeh.com/asar/entry.go
new file mode 100644
index 0000000..803b223
--- /dev/null
+++ b/vendor/layeh.com/asar/entry.go
@@ -0,0 +1,227 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"errors"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+// Flag is a bit field of Entry flags.
+type Flag uint32
+
+const (
+	// FlagNone denotes an entry with no flags.
+	FlagNone Flag = 0
+	// FlagDir denotes a directory entry.
+	FlagDir Flag = 1 << iota
+	// FlagExecutable denotes a file with the executable bit set.
+	FlagExecutable
+	// FlagUnpacked denotes that the entry's contents are not included in
+	// the archive.
+	FlagUnpacked
+)
+
+// Entry is a file or a folder in an ASAR archive.
+type Entry struct {
+	Name     string
+	Size     int64
+	Offset   int64
+	Flags    Flag
+	Parent   *Entry
+	Children []*Entry
+
+	r          io.ReaderAt
+	baseOffset int64
+}
+
+// New creates a new Entry.
+func New(name string, ra io.ReaderAt, size, offset int64, flags Flag) *Entry {
+	return &Entry{
+		Name:   name,
+		Size:   size,
+		Offset: offset,
+		Flags:  flags,
+
+		r: ra,
+	}
+}
+
+// FileInfo returns the os.FileInfo information about the entry.
+func (e *Entry) FileInfo() os.FileInfo {
+	return fileInfo{e}
+}
+
+type fileInfo struct {
+	e *Entry
+}
+
+func (f fileInfo) Name() string {
+	return f.e.Name
+}
+
+func (f fileInfo) Size() int64 {
+	return f.e.Size
+}
+
+func (f fileInfo) Mode() os.FileMode {
+	if f.e.Flags&FlagDir != 0 {
+		return 0555 | os.ModeDir
+	}
+
+	if f.e.Flags&FlagExecutable != 0 {
+		return 0555
+	}
+
+	return 0444
+}
+
+func (f fileInfo) ModTime() time.Time {
+	return time.Time{}
+}
+
+func (f fileInfo) IsDir() bool {
+	return f.e.Flags&FlagDir != 0
+}
+
+func (f fileInfo) Sys() interface{} {
+	return f.e
+}
+
+// Path returns the file path to the entry.
+//
+// For example, given the following tree structure:
+//  root
+//   - sub1
+//   - sub2
+//     - file2.jpg
+//
+// file2.jpg's path would be:
+//  sub2/file2.jpg
+func (e *Entry) Path() string {
+	if e.Parent == nil {
+		return ""
+	}
+
+	var p []string
+
+	for e != nil && e.Parent != nil {
+		p = append(p, e.Name)
+		e = e.Parent
+	}
+
+	l := len(p) / 2
+	for i := 0; i < l; i++ {
+		j := len(p) - i - 1
+		p[i], p[j] = p[j], p[i]
+	}
+
+	return strings.Join(p, "/")
+}
+
+// Open returns an *io.SectionReader of the entry's contents. nil is returned if
+// the entry cannot be opened (e.g. because it is a directory).
+func (e *Entry) Open() *io.SectionReader {
+	if e.Flags&FlagDir != 0 || e.Flags&FlagUnpacked != 0 {
+		return nil
+	}
+	return io.NewSectionReader(e.r, e.baseOffset+e.Offset, e.Size)
+}
+
+// WriteTo writes the entry's contents to the given writer. nil is returned if the entry cannot
+// be opened (e.g. if the entry is a directory).
+func (e *Entry) WriteTo(w io.Writer) (n int64, err error) {
+	r := e.Open()
+	if r == nil {
+		return 0, errors.New("asar: entry cannot be opened")
+	}
+	return io.Copy(w, r)
+}
+
+// Bytes returns the entry's contents as a byte slice. nil is returned if the
+// entry cannot be read.
+func (e *Entry) Bytes() []byte {
+	body := e.Open()
+	if body == nil {
+		return nil
+	}
+	b, err := ioutil.ReadAll(body)
+	if err != nil {
+		return nil
+	}
+	return b
+}
+
+// Bytes returns the entry's contents as a string. nil is returned if the entry
+// cannot be read.
+func (e *Entry) String() string {
+	body := e.Bytes()
+	if body == nil {
+		return ""
+	}
+	return string(body)
+}
+
+// Find searches for a sub-entry of the current entry. nil is returned if the
+// requested sub-entry cannot be found.
+//
+// For example, given the following tree structure:
+//  root
+//   - sub1
+//   - sub2
+//     - sub2.1
+//       - file2.jpg
+//
+// The following expression would return the .jpg *Entry:
+//  root.Find("sub2", "sub2.1", "file2.jpg")
+func (e *Entry) Find(path ...string) *Entry {
+pathLoop:
+	for _, name := range path {
+		for _, child := range e.Children {
+			if child.Name == name {
+				e = child
+				continue pathLoop
+			}
+		}
+		return nil
+	}
+	return e
+}
+
+// Walk recursively walks over the entry's children. See filepath.Walk and
+// filepath.WalkFunc for more information.
+func (e *Entry) Walk(walkFn filepath.WalkFunc) error {
+	return walk(e, "", walkFn)
+}
+
+func walk(e *Entry, parentPath string, walkFn filepath.WalkFunc) error {
+	for i := 0; i < len(e.Children); i++ {
+		child := e.Children[i]
+		childPath := parentPath + child.Name
+
+		err := walkFn(childPath, child.FileInfo(), nil)
+		if err == filepath.SkipDir {
+			continue
+		}
+		if err != nil {
+			return err
+		}
+		if child.Flags&FlagDir == 0 {
+			continue
+		}
+		if err := walk(child, childPath+"/", walkFn); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func validFilename(filename string) bool {
+	if filename == "." || filename == ".." {
+		return false
+	}
+	return strings.IndexAny(filename, "\x00\\/") == -1
+}
diff --git a/vendor/layeh.com/asar/header.go b/vendor/layeh.com/asar/header.go
new file mode 100644
index 0000000..905656e
--- /dev/null
+++ b/vendor/layeh.com/asar/header.go
@@ -0,0 +1,212 @@
+package asar // import "layeh.com/asar"
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+)
+
+var (
+	errHeader = errors.New("asar: invalid file header")
+)
+
+type jsonReader struct {
+	ASAR       io.ReaderAt
+	BaseOffset int64
+	D          *json.Decoder
+	Token      json.Token
+}
+
+func (j *jsonReader) Peek() json.Token {
+	if j.Token != nil {
+		return j.Token
+	}
+	tkn, err := j.D.Token()
+	if err != nil {
+		if err == io.EOF {
+			return nil
+		}
+		panic(err)
+	}
+	j.Token = tkn
+	return tkn
+}
+
+func (j *jsonReader) HasDelimRune(r rune) bool {
+	peek := j.Peek()
+	ru, ok := peek.(json.Delim)
+	if !ok {
+		return false
+	}
+	if rune(ru) != r {
+		return false
+	}
+	return true
+}
+
+func (j *jsonReader) Next() json.Token {
+	if j.Token != nil {
+		t := j.Token
+		j.Token = nil
+		return t
+	}
+
+	tkn, err := j.D.Token()
+	if err != nil {
+		if err == io.EOF {
+			return nil
+		}
+		panic(err)
+	}
+	return tkn
+}
+
+func (j *jsonReader) NextDelimRune() rune {
+	tkn := j.Next()
+	r, ok := tkn.(json.Delim)
+	if !ok {
+		panic(errHeader)
+	}
+	return rune(r)
+}
+
+func (j *jsonReader) ExpectDelim(r rune) {
+	next := j.NextDelimRune()
+	if next != r {
+		panic(errHeader)
+	}
+}
+
+func (j *jsonReader) ExpectBool() bool {
+	tkn := j.Next()
+	b, ok := tkn.(bool)
+	if !ok {
+		panic(errHeader)
+	}
+	return b
+}
+
+func (j *jsonReader) ExpectString() string {
+	next := j.Next()
+	str, ok := next.(string)
+	if !ok {
+		panic(errHeader)
+	}
+	return str
+}
+
+func (j *jsonReader) ExpectStringVal(val string) {
+	str := j.ExpectString()
+	if str != val {
+		panic(errHeader)
+	}
+}
+
+func (j *jsonReader) ExpectInt64() int64 {
+	var number json.Number
+	switch j.Peek().(type) {
+	case string:
+		number = json.Number(j.ExpectString())
+	case json.Number:
+		number = j.Next().(json.Number)
+	default:
+		panic(errHeader)
+	}
+	val, err := number.Int64()
+	if err != nil {
+		panic(errHeader)
+	}
+	return val
+}
+
+func parseRoot(r *jsonReader) *Entry {
+	entry := &Entry{
+		Flags: FlagDir,
+	}
+
+	r.ExpectDelim('{')
+	r.ExpectStringVal("files")
+	parseFiles(r, entry)
+	r.ExpectDelim('}')
+	if r.Next() != nil {
+		panic(errHeader)
+	}
+	return entry
+}
+
+func parseFiles(r *jsonReader, parent *Entry) {
+	r.ExpectDelim('{')
+	for !r.HasDelimRune('}') {
+		parseEntry(r, parent)
+	}
+	r.ExpectDelim('}')
+}
+
+func parseEntry(r *jsonReader, parent *Entry) {
+	name := r.ExpectString()
+	if name == "" {
+		panic(errHeader)
+	}
+	if !validFilename(name) {
+		panic(errHeader)
+	}
+
+	r.ExpectDelim('{')
+
+	child := &Entry{
+		Name:   name,
+		Parent: parent,
+	}
+
+	for !r.HasDelimRune('}') {
+		switch r.ExpectString() {
+		case "files":
+			child.Flags |= FlagDir
+			parseFiles(r, child)
+		case "size":
+			child.Size = r.ExpectInt64()
+		case "offset":
+			child.Offset = r.ExpectInt64()
+		case "unpacked":
+			if r.ExpectBool() {
+				child.Flags |= FlagUnpacked
+			}
+		case "executable":
+			if r.ExpectBool() {
+				child.Flags |= FlagExecutable
+			}
+		default:
+			panic(errHeader)
+		}
+	}
+
+	if child.Flags&FlagDir == 0 {
+		child.r = r.ASAR
+		child.baseOffset = r.BaseOffset
+	}
+
+	parent.Children = append(parent.Children, child)
+	r.ExpectDelim('}')
+}
+
+func decodeHeader(asar io.ReaderAt, header *io.SectionReader, offset int64) (entry *Entry, err error) {
+	decoder := json.NewDecoder(header)
+	decoder.UseNumber()
+	reader := jsonReader{
+		ASAR:       asar,
+		BaseOffset: offset,
+		D:          decoder,
+	}
+	defer func() {
+		if r := recover(); r != nil {
+			if e := r.(error); e != nil {
+				err = e
+			} else {
+				panic(r)
+			}
+		}
+
+	}()
+	entry = parseRoot(&reader)
+	return
+}