Add postgres support, clean code, code review

19 files changed, 1121 insertions, 300 deletions

diff --git a/.gopmfile b/.gopmfile
index 8d965631af..4c05ae4aec 100644
--- a/.gopmfile
+++ b/.gopmfile
@@ -11,11 +11,12 @@ github.com/Unknwon/cae=
 github.com/Unknwon/goconfig=
 github.com/dchest/scrypt=
 github.com/go-sql-driver/mysql=
+github.com/lib/pq=
 github.com/lunny/xorm=
-github.com/slene/blackfriday=
 github.com/gogits/logs=
 github.com/gogits/binding=
 github.com/gogits/git=
+github.com/gogits/gfm=
 
 [res]
 include=templates|public|conf
diff --git a/README.md b/README.md
index 52f95f3c68..6589068e79 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,8 @@ There are some very good products in this category such as [gitlab](http://gitla
 
 ## Overview
 
-Please see [Wiki](https://github.com/gogits/gogs/wiki) for project design, develop specification, change log and road map.
+- Please see [Wiki](https://github.com/gogits/gogs/wiki) for project design, develop specification, change log and road map.
+- See [Trello Broad](https://trello.com/b/uxAoeLUl/gogs-go-git-service) to follow the develop team.
 
 ## Features
 
@@ -24,6 +25,7 @@ Please see [Wiki](https://github.com/gogits/gogs/wiki) for project design, devel
 - User profile page.
 - Repository viewer.
 - Gravatar support.
+- Supports MySQL and PostgreSQL.
 
 ## Installation
 
@@ -40,4 +42,4 @@ There are two ways to install Gogs:
 
 ## Contributors
 
-This project was launched by [Unknown](https://github.com/Unknwon), [lunny](https://github.com/lunny) and [fuxiaohei](https://github.com/fuxiaohei). See [contributors page](https://github.com/gogits/gogs/graphs/contributors) for full list of contributors.
\ No newline at end of file
+This project was launched by [Unknown](https://github.com/Unknwon) and [lunny](https://github.com/lunny); [fuxiaohei](https://github.com/fuxiaohei) and [slene](https://github.com/slene) joined the team soon after. See [contributors page](https://github.com/gogits/gogs/graphs/contributors) for full list of contributors.
\ No newline at end of file
diff --git a/conf/app.ini b/conf/app.ini
index cc7d0a907f..1c7021072f 100644
--- a/conf/app.ini
+++ b/conf/app.ini
@@ -1,10 +1,12 @@
+# App name that shows on every page title
 APP_NAME = Gogs: Go Git Service
+# !!MUST CHANGE TO YOUR USER NAME!!
 RUN_USER = lunny
 
 [repository]
 ROOT = /Users/%(RUN_USER)s/git/gogs-repositories
-LANG_IGNS=Google Go|C|Python|Ruby
-LICENSES=Apache v2 License|GPL v2|MIT License|BSD (3-Clause) License
+LANG_IGNS=Google Go|C|Python|Ruby|C Sharp
+LICENSES=Apache v2 License|GPL v2|MIT License|Affero GPL|BSD (3-Clause) License
 
 [server]
 DOMAIN = gogits.org
@@ -12,11 +14,15 @@ HTTP_ADDR =
 HTTP_PORT = 3000
 
 [database]
+# Either "mysql" or "postgres", it's your choice
 DB_TYPE = mysql
 HOST = 
 NAME = gogs
 USER = root
 PASSWD =
+# For "postgres" only, either "disable" or "verify-full"
+SSL_MODE = disable
 
 [security]
+# !!CHANGE THIS TO KEEP YOUR USER DATA SAFE!!
 USER_PASSWD_SALT = !#@FDEWREWR&*(
diff --git a/conf/gitignore/C Sharp b/conf/gitignore/C Sharp
new file mode 100644
index 0000000000..8ec39a1dc8
--- /dev/null
+++ b/conf/gitignore/C Sharp
@@ -0,0 +1,108 @@
+# Build Folders (you can keep bin if you'd like, to store dlls and pdbs)
+[Bb]in/
+[Oo]bj/
+
+# mstest test results
+TestResults
+
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.sln.docstates
+
+# Build results
+[Dd]ebug/
+[Rr]elease/
+x64/
+*_i.c
+*_p.c
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.log
+*.vspscc
+*.vssscc
+.builds
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*
+
+# NCrunch
+*.ncrunch*
+.*crunch*.local.xml
+
+# Installshield output folder 
+[Ee]xpress
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish
+
+# Publish Web Output
+*.Publish.xml
+
+# NuGet Packages Directory
+packages
+
+# Windows Azure Build Output
+csx
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
+[Bb]in
+[Oo]bj
+sql
+TestResults
+[Tt]est[Rr]esult*
+*.Cache
+ClientBin
+[Ss]tyle[Cc]op.*
+~$*
+*.dbmdl
+Generated_Code #added for RIA/Silverlight projects
+
+# Backup & report files from converting an old project file to a newer
+# Visual Studio version. Backup files are not needed, because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
\ No newline at end of file
diff --git a/conf/license/Affero GPL b/conf/license/Affero GPL
new file mode 100644
index 0000000000..3ffc567893
--- /dev/null
+++ b/conf/license/Affero GPL
@@ -0,0 +1,661 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
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+
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+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.
\ No newline at end of file
diff --git a/gogs.go b/gogs.go
index 6b587993a2..433b9af094 100644
--- a/gogs.go
+++ b/gogs.go
@@ -20,7 +20,7 @@ import (
 // Test that go1.1 tag above is included in builds. main.go refers to this definition.
 const go11tag = true
 
-const APP_VER = "0.0.9.0317.1"
+const APP_VER = "0.1.0.0317.1"
 
 func init() {
 	base.AppVer = APP_VER
diff --git a/models/access.go b/models/access.go
index ea5cbfaa50..36d9405f52 100644
--- a/models/access.go
+++ b/models/access.go
@@ -9,11 +9,13 @@ import (
 	"time"
 )
 
+// Access types.
 const (
 	AU_READABLE = iota + 1
 	AU_WRITABLE
 )
 
+// Access represents the accessibility of user and repository.
 type Access struct {
 	Id       int64
 	UserName string    `xorm:"unique(s)"`
@@ -22,12 +24,13 @@ type Access struct {
 	Created  time.Time `xorm:"created"`
 }
 
+// AddAccess adds new access record.
 func AddAccess(access *Access) error {
 	_, err := orm.Insert(access)
 	return err
 }
 
-// if one user can read or write one repository
+// HasAccess returns true if someone can read or write given repository.
 func HasAccess(userName, repoName string, mode int) (bool, error) {
 	return orm.Get(&Access{
 		Id:       0,
diff --git a/models/action.go b/models/action.go
index 978e805c88..7917929df4 100644
--- a/models/action.go
+++ b/models/action.go
@@ -19,7 +19,7 @@ const (
 	OP_PULL_REQUEST
 )
 
-// An Action represents
+// Action represents user operation type and information to the repository.
 type Action struct {
 	Id          int64
 	UserId      int64 // Receiver user id.
diff --git a/models/models.go b/models/models.go
index 7c28dc5422..d6a6200eb3 100644
--- a/models/models.go
+++ b/models/models.go
@@ -7,10 +7,9 @@ package models
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 
-	"github.com/Unknwon/com"
 	_ "github.com/go-sql-driver/mysql"
+	_ "github.com/lib/pq"
 	"github.com/lunny/xorm"
 
 	"github.com/gogits/gogs/modules/base"
@@ -47,54 +46,50 @@ func setEngine() {
 	dbName := base.Cfg.MustValue("database", "NAME")
 	dbUser := base.Cfg.MustValue("database", "USER")
 	dbPwd := base.Cfg.MustValue("database", "PASSWD")
+	sslMode := base.Cfg.MustValue("database", "SSL_MODE")
 
 	var err error
 	switch dbType {
 	case "mysql":
-		orm, err = xorm.NewEngine("mysql", fmt.Sprintf("%v:%v@%v/%v?charset=utf8",
+		orm, err = xorm.NewEngine("mysql", fmt.Sprintf("%s:%s@%s/%s?charset=utf8",
 			dbUser, dbPwd, dbHost, dbName))
+	case "postgres":
+		orm, err = xorm.NewEngine("postgres", fmt.Sprintf("user=%s password=%s dbname=%s sslmode=%s",
+			dbUser, dbPwd, dbName, sslMode))
 	default:
 		fmt.Printf("Unknown database type: %s\n", dbType)
 		os.Exit(2)
 	}
-
 	if err != nil {
-		fmt.Printf("models.init -> fail to conntect database: %s\n", dbType)
+		fmt.Printf("models.init(fail to conntect database): %v\n", err)
 		os.Exit(2)
 	}
 
-	//TODO: for serv command, MUST remove the output to os.stdout, so
+	// TODO: for serv command, MUST remove the output to os.stdout, so
 	// use log file to instead print to stdout
 
 	//x.ShowDebug = true
 	//orm.ShowErr = true
-	f, _ := os.Create("xorm.log")
+	f, err := os.Create("xorm.log")
+	if err != nil {
+		fmt.Printf("models.init(fail to create xorm.log): %v\n", err)
+		os.Exit(2)
+	}
 	orm.Logger = f
 	orm.ShowSQL = true
 
+	// Determine and create root git reposiroty path.
 	RepoRootPath = base.Cfg.MustValue("repository", "ROOT")
 	if err = os.MkdirAll(RepoRootPath, os.ModePerm); err != nil {
-		fmt.Printf("models.init -> fail to create RepoRootPath(%s): %v\n", RepoRootPath, err)
-		os.Exit(2)
-	}
-
-	homeDir, err := com.HomeDir()
-	if err != nil {
-		fmt.Printf("models.init -> fail to get homeDir: %v\n", err)
-		os.Exit(2)
-	}
-	sshPath := filepath.Join(homeDir, ".ssh")
-	if err = os.MkdirAll(sshPath, os.ModePerm); err != nil {
-		fmt.Printf("models.init -> fail to create sshPath(%s): %v\n", sshPath, err)
+		fmt.Printf("models.init(fail to create RepoRootPath(%s)): %v\n", RepoRootPath, err)
 		os.Exit(2)
 	}
 }
 
 func init() {
 	setEngine()
-	err := orm.Sync(new(User), new(PublicKey), new(Repository), new(Access), new(Action))
-	if err != nil {
-		fmt.Printf("sync database struct error: %s\n", err)
+	if err := orm.Sync(new(User), new(PublicKey), new(Repository), new(Access), new(Action)); err != nil {
+		fmt.Printf("sync database struct error: %v\n", err)
 		os.Exit(2)
 	}
 }
diff --git a/models/publickey.go b/models/publickey.go
index ee6bd53101..021d690fb6 100644
--- a/models/publickey.go
+++ b/models/publickey.go
@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -20,16 +21,19 @@ import (
 	"github.com/Unknwon/com"
 )
 
+const (
+	// "### autogenerated by gitgos, DO NOT EDIT\n"
+	TPL_PUBLICK_KEY = `command="%s serv key-%d",no-port-forwarding, no-X11-forwarding,no-agent-forwarding,no-pty %s`
+)
+
 var (
 	sshOpLocker = sync.Mutex{}
-	//publicKeyRootPath string
+
 	sshPath string
 	appPath string
-	// "### autogenerated by gitgos, DO NOT EDIT\n"
-	tmplPublicKey = "command=\"%s serv key-%d\",no-port-forwarding," +
-		"no-X11-forwarding,no-agent-forwarding,no-pty %s\n"
 )
 
+// exePath returns the executable path.
 func exePath() (string, error) {
 	file, err := exec.LookPath(os.Args[0])
 	if err != nil {
@@ -38,6 +42,7 @@ func exePath() (string, error) {
 	return filepath.Abs(file)
 }
 
+// homeDir returns the home directory of current user.
 func homeDir() string {
 	home, err := com.HomeDir()
 	if err != nil {
@@ -48,15 +53,22 @@ func homeDir() string {
 
 func init() {
 	var err error
+
 	appPath, err = exePath()
 	if err != nil {
-		println(err.Error())
+		fmt.Printf("publickey.init(fail to get app path): %v\n", err)
 		os.Exit(2)
 	}
 
+	// Determine and create .ssh path.
 	sshPath = filepath.Join(homeDir(), ".ssh")
+	if err = os.MkdirAll(sshPath, os.ModePerm); err != nil {
+		fmt.Printf("publickey.init(fail to create sshPath(%s)): %v\n", sshPath, err)
+		os.Exit(2)
+	}
 }
 
+// PublicKey represents a SSH key of user.
 type PublicKey struct {
 	Id          int64
 	OwnerId     int64  `xorm:"index"`
@@ -71,10 +83,12 @@ var (
 	ErrKeyAlreadyExist = errors.New("Public key already exist")
 )
 
+// GenAuthorizedKey returns formatted public key string.
 func GenAuthorizedKey(keyId int64, key string) string {
-	return fmt.Sprintf(tmplPublicKey, appPath, keyId, key)
+	return fmt.Sprintf(TPL_PUBLICK_KEY+"\n", appPath, keyId, key)
 }
 
+// AddPublicKey adds new public key to database and SSH key file.
 func AddPublicKey(key *PublicKey) (err error) {
 	// Check if public key name has been used.
 	has, err := orm.Get(key)
@@ -88,14 +102,9 @@ func AddPublicKey(key *PublicKey) (err error) {
 	tmpPath := filepath.Join(os.TempDir(), fmt.Sprintf("%d", time.Now().Nanosecond()),
 		"id_rsa.pub")
 	os.MkdirAll(path.Dir(tmpPath), os.ModePerm)
-	f, err := os.Create(tmpPath)
-	if err != nil {
-		return
-	}
-	if _, err = f.WriteString(key.Content); err != nil {
+	if err = ioutil.WriteFile(tmpPath, []byte(key.Content), os.ModePerm); err != nil {
 		return err
 	}
-	f.Close()
 	stdout, _, err := com.ExecCmd("ssh-keygen", "-l", "-f", tmpPath)
 	if err != nil {
 		return err
@@ -108,7 +117,6 @@ func AddPublicKey(key *PublicKey) (err error) {
 	if _, err = orm.Insert(key); err != nil {
 		return err
 	}
-
 	if err = SaveAuthorizedKeyFile(key); err != nil {
 		if _, err2 := orm.Delete(key); err2 != nil {
 			return err2
@@ -121,6 +129,7 @@ func AddPublicKey(key *PublicKey) (err error) {
 
 // DeletePublicKey deletes SSH key information both in database and authorized_keys file.
 func DeletePublicKey(key *PublicKey) (err error) {
+	// Delete SSH key in database.
 	has, err := orm.Id(key.Id).Get(key)
 	if err != nil {
 		return err
@@ -131,6 +140,7 @@ func DeletePublicKey(key *PublicKey) (err error) {
 		return err
 	}
 
+	// Delete SSH key in SSH key file.
 	sshOpLocker.Lock()
 	defer sshOpLocker.Unlock()
 
@@ -182,16 +192,17 @@ func DeletePublicKey(key *PublicKey) (err error) {
 	if err = os.Remove(p); err != nil {
 		return err
 	}
-
 	return os.Rename(tmpP, p)
 }
 
+// ListPublicKey returns a list of public keys that user has.
 func ListPublicKey(userId int64) ([]PublicKey, error) {
 	keys := make([]PublicKey, 0)
 	err := orm.Find(&keys, &PublicKey{OwnerId: userId})
 	return keys, err
 }
 
+// SaveAuthorizedKeyFile writes SSH key content to SSH key file.
 func SaveAuthorizedKeyFile(key *PublicKey) error {
 	sshOpLocker.Lock()
 	defer sshOpLocker.Unlock()
@@ -203,7 +214,6 @@ func SaveAuthorizedKeyFile(key *PublicKey) error {
 	}
 	defer f.Close()
 
-	//os.Chmod(p, 0600)
 	_, err = f.WriteString(GenAuthorizedKey(key.Id, key.Content))
 	return err
 }
diff --git a/models/repo.go b/models/repo.go
index 7f0307308b..1b74f19d46 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"path"
 	"path/filepath"
 	"strings"
 	"sync"
@@ -24,6 +25,7 @@ import (
 	"github.com/gogits/gogs/modules/log"
 )
 
+// Repository represents a git repository.
 type Repository struct {
 	Id          int64
 	OwnerId     int64 `xorm:"unique(s)"`
@@ -63,7 +65,7 @@ func init() {
 	zip.Verbose = false
 }
 
-// check if repository is exist
+// IsRepositoryExist returns true if the repository with given name under user has already existed.
 func IsRepositoryExist(user *User, repoName string) (bool, error) {
 	repo := Repository{OwnerId: user.Id}
 	has, err := orm.Where("lower_name = ?", strings.ToLower(repoName)).Get(&repo)
@@ -94,8 +96,8 @@ func CreateRepository(user *User, repoName, desc, repoLang, license string, priv
 		Private:     private,
 	}
 
-	f := RepoPath(user.Name, repoName)
-	if err = initRepository(f, user, repo, initReadme, repoLang, license); err != nil {
+	repoPath := RepoPath(user.Name, repoName)
+	if err = initRepository(repoPath, user, repo, initReadme, repoLang, license); err != nil {
 		return nil, err
 	}
 	session := orm.NewSession()
@@ -103,9 +105,10 @@ func CreateRepository(user *User, repoName, desc, repoLang, license string, priv
 	session.Begin()
 
 	if _, err = session.Insert(repo); err != nil {
-		if err2 := os.RemoveAll(f); err2 != nil {
+		if err2 := os.RemoveAll(repoPath); err2 != nil {
+			log.Error("repo.CreateRepository(repo): %v", err)
 			return nil, errors.New(fmt.Sprintf(
-				"delete repo directory %s/%s failed", user.Name, repoName))
+				"delete repo directory %s/%s failed(1): %v", user.Name, repoName, err2))
 		}
 		session.Rollback()
 		return nil, err
@@ -118,33 +121,39 @@ func CreateRepository(user *User, repoName, desc, repoLang, license string, priv
 	}
 	if _, err = session.Insert(&access); err != nil {
 		session.Rollback()
-		if err2 := os.RemoveAll(f); err2 != nil {
+		if err2 := os.RemoveAll(repoPath); err2 != nil {
+			log.Error("repo.CreateRepository(access): %v", err)
 			return nil, errors.New(fmt.Sprintf(
-				"delete repo directory %s/%s failed", user.Name, repoName))
+				"delete repo directory %s/%s failed(2): %v", user.Name, repoName, err2))
 		}
 		return nil, err
 	}
 
-	if _, err = session.Exec("update user set num_repos = num_repos + 1 where id = ?", user.Id); err != nil {
+	rawSql := "UPDATE user SET num_repos = num_repos + 1 WHERE id = ?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "UPDATE \"user\" SET num_repos = num_repos + 1 WHERE id = ?"
+	}
+	if _, err = session.Exec(rawSql, user.Id); err != nil {
 		session.Rollback()
-		if err2 := os.RemoveAll(f); err2 != nil {
+		if err2 := os.RemoveAll(repoPath); err2 != nil {
+			log.Error("repo.CreateRepository(repo count): %v", err)
 			return nil, errors.New(fmt.Sprintf(
-				"delete repo directory %s/%s failed", user.Name, repoName))
+				"delete repo directory %s/%s failed(3): %v", user.Name, repoName, err2))
 		}
 		return nil, err
 	}
 
 	if err = session.Commit(); err != nil {
 		session.Rollback()
-		if err2 := os.RemoveAll(f); err2 != nil {
+		if err2 := os.RemoveAll(repoPath); err2 != nil {
+			log.Error("repo.CreateRepository(commit): %v", err)
 			return nil, errors.New(fmt.Sprintf(
-				"delete repo directory %s/%s failed", user.Name, repoName))
+				"delete repo directory %s/%s failed(3): %v", user.Name, repoName, err2))
 		}
 		return nil, err
 	}
 
 	return repo, NewRepoAction(user, repo)
-	return nil, nil
 }
 
 // extractGitBareZip extracts git-bare.zip to repository path.
@@ -255,6 +264,7 @@ func initRepository(f string, user *User, repo *Repository, initReadme bool, rep
 	return nil
 }
 
+// GetRepositoryByName returns the repository by given name under user if exists.
 func GetRepositoryByName(user *User, repoName string) (*Repository, error) {
 	repo := &Repository{
 		OwnerId:   user.Id,
@@ -269,6 +279,7 @@ func GetRepositoryByName(user *User, repoName string) (*Repository, error) {
 	return repo, err
 }
 
+// GetRepositoryById returns the repository by given id if exists.
 func GetRepositoryById(id int64) (repo *Repository, err error) {
 	has, err := orm.Id(id).Get(repo)
 	if err != nil {
@@ -336,7 +347,11 @@ func DeleteRepository(userId, repoId int64, userName string) (err error) {
 		session.Rollback()
 		return err
 	}
-	if _, err = session.Exec("update user set num_repos = num_repos - 1 where id = ?", userId); err != nil {
+	rawSql := "UPDATE user SET num_repos = num_repos - 1 WHERE id = ?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "UPDATE \"user\" SET num_repos = num_repos - 1 WHERE id = ?"
+	}
+	if _, err = session.Exec(rawSql, userId); err != nil {
 		session.Rollback()
 		return err
 	}
@@ -346,8 +361,204 @@ func DeleteRepository(userId, repoId int64, userName string) (err error) {
 	}
 	if err = os.RemoveAll(RepoPath(userName, repo.Name)); err != nil {
 		// TODO: log and delete manully
-		log.Error("delete repo %s/%s failed", userName, repo.Name)
+		log.Error("delete repo %s/%s failed: %v", userName, repo.Name, err)
 		return err
 	}
 	return nil
 }
+
+// Commit represents a git commit.
+type Commit struct {
+	Author  string
+	Email   string
+	Date    time.Time
+	SHA     string
+	Message string
+}
+
+var (
+	ErrRepoFileNotLoaded = fmt.Errorf("repo file not loaded")
+)
+
+// RepoFile represents a file object in git repository.
+type RepoFile struct {
+	*git.TreeEntry
+	Path       string
+	Message    string
+	Created    time.Time
+	Size       int64
+	Repo       *git.Repository
+	LastCommit string
+}
+
+// LookupBlob returns the content of an object.
+func (file *RepoFile) LookupBlob() (*git.Blob, error) {
+	if file.Repo == nil {
+		return nil, ErrRepoFileNotLoaded
+	}
+
+	return file.Repo.LookupBlob(file.Id)
+}
+
+// GetBranches returns all branches of given repository.
+func GetBranches(userName, reposName string) ([]string, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+
+	refs, err := repo.AllReferences()
+	if err != nil {
+		return nil, err
+	}
+
+	brs := make([]string, len(refs))
+	for i, ref := range refs {
+		brs[i] = ref.Name
+	}
+	return brs, nil
+}
+
+// GetReposFiles returns a list of file object in given directory of repository.
+func GetReposFiles(userName, reposName, branchName, rpath string) ([]*RepoFile, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+
+	ref, err := repo.LookupReference("refs/heads/" + branchName)
+	if err != nil {
+		return nil, err
+	}
+
+	lastCommit, err := repo.LookupCommit(ref.Oid)
+	if err != nil {
+		return nil, err
+	}
+
+	var repodirs []*RepoFile
+	var repofiles []*RepoFile
+	lastCommit.Tree.Walk(func(dirname string, entry *git.TreeEntry) int {
+		if dirname == rpath {
+			size, err := repo.ObjectSize(entry.Id)
+			if err != nil {
+				return 0
+			}
+
+			var cm = lastCommit
+
+			for {
+				if cm.ParentCount() == 0 {
+					break
+				} else if cm.ParentCount() == 1 {
+					pt, _ := repo.SubTree(cm.Parent(0).Tree, dirname)
+					if pt == nil {
+						break
+					}
+					pEntry := pt.EntryByName(entry.Name)
+					if pEntry == nil || !pEntry.Id.Equal(entry.Id) {
+						break
+					} else {
+						cm = cm.Parent(0)
+					}
+				} else {
+					var emptyCnt = 0
+					var sameIdcnt = 0
+					for i := 0; i < cm.ParentCount(); i++ {
+						p := cm.Parent(i)
+						pt, _ := repo.SubTree(p.Tree, dirname)
+						var pEntry *git.TreeEntry
+						if pt != nil {
+							pEntry = pt.EntryByName(entry.Name)
+						}
+
+						if pEntry == nil {
+							if emptyCnt == cm.ParentCount()-1 {
+								goto loop
+							} else {
+								emptyCnt = emptyCnt + 1
+								continue
+							}
+						} else {
+							if !pEntry.Id.Equal(entry.Id) {
+								goto loop
+							} else {
+								if sameIdcnt == cm.ParentCount()-1 {
+									// TODO: now follow the first parent commit?
+									cm = cm.Parent(0)
+									break
+								}
+								sameIdcnt = sameIdcnt + 1
+							}
+						}
+					}
+				}
+			}
+
+		loop:
+
+			rp := &RepoFile{
+				entry,
+				path.Join(dirname, entry.Name),
+				cm.Message(),
+				cm.Committer.When,
+				size,
+				repo,
+				cm.Id().String(),
+			}
+
+			if entry.IsFile() {
+				repofiles = append(repofiles, rp)
+			} else if entry.IsDir() {
+				repodirs = append(repodirs, rp)
+			}
+		}
+		return 0
+	})
+
+	return append(repodirs, repofiles...), nil
+}
+
+// GetLastestCommit returns the latest commit of given repository.
+func GetLastestCommit(userName, repoName string) (*Commit, error) {
+	stdout, _, err := com.ExecCmd("git", "--git-dir="+RepoPath(userName, repoName), "log", "-1")
+	if err != nil {
+		return nil, err
+	}
+
+	commit := new(Commit)
+	for _, line := range strings.Split(stdout, "\n") {
+		if len(line) == 0 {
+			continue
+		}
+		switch {
+		case line[0] == 'c':
+			commit.SHA = line[7:]
+		case line[0] == 'A':
+			infos := strings.SplitN(line, " ", 3)
+			commit.Author = infos[1]
+			commit.Email = infos[2][1 : len(infos[2])-1]
+		case line[0] == 'D':
+			commit.Date, err = time.Parse("Mon Jan 02 15:04:05 2006 -0700", line[8:])
+			if err != nil {
+				return nil, err
+			}
+		case line[:4] == "    ":
+			commit.Message = line[4:]
+		}
+	}
+	return commit, nil
+}
+
+// GetCommits returns all commits of given branch of repository.
+func GetCommits(userName, reposName, branchname string) ([]*git.Commit, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+	r, err := repo.LookupReference(fmt.Sprintf("refs/heads/%s", branchname))
+	if err != nil {
+		return nil, err
+	}
+	return r.AllCommits()
+}
diff --git a/models/repo2.go b/models/repo2.go
deleted file mode 100644
index 8356c52de4..0000000000
--- a/models/repo2.go
+++ /dev/null
@@ -1,205 +0,0 @@
-// Copyright 2014 The Gogs Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package models
-
-import (
-	"fmt"
-	"path"
-	"strings"
-	"time"
-
-	"github.com/Unknwon/com"
-
-	"github.com/gogits/git"
-)
-
-type Commit struct {
-	Author  string
-	Email   string
-	Date    time.Time
-	SHA     string
-	Message string
-}
-
-var (
-	ErrRepoFileNotLoaded = fmt.Errorf("repo file not loaded")
-)
-
-type RepoFile struct {
-	*git.TreeEntry
-	Path       string
-	Message    string
-	Created    time.Time
-	Size       int64
-	Repo       *git.Repository
-	LastCommit string
-}
-
-func (file *RepoFile) LookupBlob() (*git.Blob, error) {
-	if file.Repo == nil {
-		return nil, ErrRepoFileNotLoaded
-	}
-
-	return file.Repo.LookupBlob(file.Id)
-}
-
-func GetBranches(userName, reposName string) ([]string, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-
-	refs, err := repo.AllReferences()
-	if err != nil {
-		return nil, err
-	}
-
-	brs := make([]string, len(refs))
-	for i, ref := range refs {
-		brs[i] = ref.Name
-	}
-	return brs, nil
-}
-
-func GetReposFiles(userName, reposName, branchName, rpath string) ([]*RepoFile, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-
-	ref, err := repo.LookupReference("refs/heads/" + branchName)
-	if err != nil {
-		return nil, err
-	}
-
-	lastCommit, err := repo.LookupCommit(ref.Oid)
-	if err != nil {
-		return nil, err
-	}
-
-	var repodirs []*RepoFile
-	var repofiles []*RepoFile
-	lastCommit.Tree.Walk(func(dirname string, entry *git.TreeEntry) int {
-		if dirname == rpath {
-			size, err := repo.ObjectSize(entry.Id)
-			if err != nil {
-				return 0
-			}
-
-			var cm = lastCommit
-
-			for {
-				if cm.ParentCount() == 0 {
-					break
-				} else if cm.ParentCount() == 1 {
-					pt, _ := repo.SubTree(cm.Parent(0).Tree, dirname)
-					if pt == nil {
-						break
-					}
-					pEntry := pt.EntryByName(entry.Name)
-					if pEntry == nil || !pEntry.Id.Equal(entry.Id) {
-						break
-					} else {
-						cm = cm.Parent(0)
-					}
-				} else {
-					var emptyCnt = 0
-					var sameIdcnt = 0
-					for i := 0; i < cm.ParentCount(); i++ {
-						p := cm.Parent(i)
-						pt, _ := repo.SubTree(p.Tree, dirname)
-						var pEntry *git.TreeEntry
-						if pt != nil {
-							pEntry = pt.EntryByName(entry.Name)
-						}
-
-						if pEntry == nil {
-							if emptyCnt == cm.ParentCount()-1 {
-								goto loop
-							} else {
-								emptyCnt = emptyCnt + 1
-								continue
-							}
-						} else {
-							if !pEntry.Id.Equal(entry.Id) {
-								goto loop
-							} else {
-								if sameIdcnt == cm.ParentCount()-1 {
-									// TODO: now follow the first parent commit?
-									cm = cm.Parent(0)
-									break
-								}
-								sameIdcnt = sameIdcnt + 1
-							}
-						}
-					}
-				}
-			}
-
-		loop:
-
-			rp := &RepoFile{
-				entry,
-				path.Join(dirname, entry.Name),
-				cm.Message(),
-				cm.Committer.When,
-				size,
-				repo,
-				cm.Id().String(),
-			}
-
-			if entry.IsFile() {
-				repofiles = append(repofiles, rp)
-			} else if entry.IsDir() {
-				repodirs = append(repodirs, rp)
-			}
-		}
-		return 0
-	})
-
-	return append(repodirs, repofiles...), nil
-}
-
-func GetLastestCommit(userName, repoName string) (*Commit, error) {
-	stdout, _, err := com.ExecCmd("git", "--git-dir="+RepoPath(userName, repoName), "log", "-1")
-	if err != nil {
-		return nil, err
-	}
-
-	commit := new(Commit)
-	for _, line := range strings.Split(stdout, "\n") {
-		if len(line) == 0 {
-			continue
-		}
-		switch {
-		case line[0] == 'c':
-			commit.SHA = line[7:]
-		case line[0] == 'A':
-			infos := strings.SplitN(line, " ", 3)
-			commit.Author = infos[1]
-			commit.Email = infos[2][1 : len(infos[2])-1]
-		case line[0] == 'D':
-			commit.Date, err = time.Parse("Mon Jan 02 15:04:05 2006 -0700", line[8:])
-			if err != nil {
-				return nil, err
-			}
-		case line[:4] == "    ":
-			commit.Message = line[4:]
-		}
-	}
-	return commit, nil
-}
-
-func GetCommits(userName, reposName, branchname string) ([]*git.Commit, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-	r, err := repo.LookupReference(fmt.Sprintf("refs/heads/%s", branchname))
-	if err != nil {
-		return nil, err
-	}
-	return r.AllCommits()
-}
diff --git a/models/user.go b/models/user.go
index e7301af981..3378b882ff 100644
--- a/models/user.go
+++ b/models/user.go
@@ -19,7 +19,9 @@ import (
 	"github.com/gogits/gogs/modules/base"
 )
 
-var UserPasswdSalt string
+var (
+	UserPasswdSalt string
+)
 
 func init() {
 	UserPasswdSalt = base.Cfg.MustValue("security", "USER_PASSWD_SALT")
@@ -37,7 +39,7 @@ const (
 	LT_LDAP
 )
 
-// A User represents the object of individual and member of organization.
+// User represents the object of individual and member of organization.
 type User struct {
 	Id            int64
 	LowerName     string `xorm:"unique not null"`
@@ -58,15 +60,16 @@ type User struct {
 	Updated       time.Time `xorm:"updated"`
 }
 
+// HomeLink returns the user home page link.
 func (user *User) HomeLink() string {
 	return "/user/" + user.LowerName
 }
 
+// AvatarLink returns the user gravatar link.
 func (user *User) AvatarLink() string {
 	return "http://1.gravatar.com/avatar/" + user.Avatar
 }
 
-// A Follow represents
 type Follow struct {
 	Id       int64
 	UserId   int64     `xorm:"unique(s)"`
@@ -87,6 +90,7 @@ func IsUserExist(name string) (bool, error) {
 	return orm.Get(&User{LowerName: strings.ToLower(name)})
 }
 
+// IsEmailUsed returns true if the e-mail has been used.
 func IsEmailUsed(email string) (bool, error) {
 	return orm.Get(&User{Email: email})
 }
@@ -121,16 +125,12 @@ func RegisterUser(user *User) (err error) {
 	user.AvatarEmail = user.Email
 	if err = user.EncodePasswd(); err != nil {
 		return err
-	}
-	if _, err = orm.Insert(user); err != nil {
+	} else if _, err = orm.Insert(user); err != nil {
 		return err
-	}
-
-	if err = os.MkdirAll(UserPath(user.Name), os.ModePerm); err != nil {
-
+	} else if err = os.MkdirAll(UserPath(user.Name), os.ModePerm); err != nil {
 		if _, err := orm.Id(user.Id).Delete(&User{}); err != nil {
 			return errors.New(fmt.Sprintf(
-				"both create userpath %s and delete table record faild", user.Name))
+				"both create userpath %s and delete table record faild: %v", user.Name, err))
 		}
 		return err
 	}
@@ -188,23 +188,28 @@ func (user *User) EncodePasswd() error {
 	return err
 }
 
+// UserPath returns the path absolute path of user repositories.
 func UserPath(userName string) string {
 	return filepath.Join(RepoRootPath, userName)
 }
 
 func GetUserByKeyId(keyId int64) (*User, error) {
 	user := new(User)
-	has, err := orm.Sql("select a.* from user as a, public_key as b where a.id = b.owner_id and b.id=?", keyId).Get(user)
+	rawSql := "SELECT a.* FROM user AS a, public_key AS b WHERE a.id = b.owner_id AND b.id=?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "SELECT a.* FROM \"user\" AS a, public_key AS b WHERE a.id = b.owner_id AND b.id=?"
+	}
+	has, err := orm.Sql(rawSql, keyId).Get(user)
 	if err != nil {
 		return nil, err
-	}
-	if !has {
+	} else if !has {
 		err = errors.New("not exist key owner")
 		return nil, err
 	}
 	return user, nil
 }
 
+// GetUserById returns the user object by given id if exists.
 func GetUserById(id int64) (*User, error) {
 	user := new(User)
 	has, err := orm.Id(id).Get(user)
@@ -217,6 +222,7 @@ func GetUserById(id int64) (*User, error) {
 	return user, nil
 }
 
+// GetUserByName returns the user object by given name if exists.
 func GetUserByName(name string) (*User, error) {
 	if len(name) == 0 {
 		return nil, ErrUserNotExist
@@ -227,8 +233,7 @@ func GetUserByName(name string) (*User, error) {
 	has, err := orm.Get(user)
 	if err != nil {
 		return nil, err
-	}
-	if !has {
+	} else if !has {
 		return nil, ErrUserNotExist
 	}
 	return user, nil
@@ -242,32 +247,39 @@ func LoginUserPlain(name, passwd string) (*User, error) {
 	}
 
 	has, err := orm.Get(&user)
-	if !has {
-		err = ErrUserNotExist
-	}
 	if err != nil {
 		return nil, err
+	} else if !has {
+		err = ErrUserNotExist
 	}
 	return &user, nil
 }
 
 // FollowUser marks someone be another's follower.
-func FollowUser(userId int64, followId int64) error {
+func FollowUser(userId int64, followId int64) (err error) {
 	session := orm.NewSession()
 	defer session.Close()
 	session.Begin()
-	_, err := session.Insert(&Follow{UserId: userId, FollowId: followId})
-	if err != nil {
+
+	if _, err = session.Insert(&Follow{UserId: userId, FollowId: followId}); err != nil {
 		session.Rollback()
 		return err
 	}
-	_, err = session.Exec("update user set num_followers = num_followers + 1 where id = ?", followId)
-	if err != nil {
+
+	rawSql := "UPDATE user SET num_followers = num_followers + 1 WHERE id = ?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "UPDATE \"user\" SET num_followers = num_followers + 1 WHERE id = ?"
+	}
+	if _, err = session.Exec(rawSql, followId); err != nil {
 		session.Rollback()
 		return err
 	}
-	_, err = session.Exec("update user set num_followings = num_followings + 1 where id = ?", userId)
-	if err != nil {
+
+	rawSql = "UPDATE user SET num_followings = num_followings + 1 WHERE id = ?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "UPDATE \"user\" SET num_followings = num_followings + 1 WHERE id = ?"
+	}
+	if _, err = session.Exec(rawSql, userId); err != nil {
 		session.Rollback()
 		return err
 	}
@@ -275,22 +287,30 @@ func FollowUser(userId int64, followId int64) error {
 }
 
 // UnFollowUser unmarks someone be another's follower.
-func UnFollowUser(userId int64, unFollowId int64) error {
+func UnFollowUser(userId int64, unFollowId int64) (err error) {
 	session := orm.NewSession()
 	defer session.Close()
 	session.Begin()
-	_, err := session.Delete(&Follow{UserId: userId, FollowId: unFollowId})
-	if err != nil {
+
+	if _, err = session.Delete(&Follow{UserId: userId, FollowId: unFollowId}); err != nil {
 		session.Rollback()
 		return err
 	}
-	_, err = session.Exec("update user set num_followers = num_followers - 1 where id = ?", unFollowId)
-	if err != nil {
+
+	rawSql := "UPDATE user SET num_followers = num_followers - 1 WHERE id = ?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "UPDATE \"user\" SET num_followers = num_followers - 1 WHERE id = ?"
+	}
+	if _, err = session.Exec(rawSql, unFollowId); err != nil {
 		session.Rollback()
 		return err
 	}
-	_, err = session.Exec("update user set num_followings = num_followings - 1 where id = ?", userId)
-	if err != nil {
+
+	rawSql = "UPDATE user SET num_followings = num_followings - 1 WHERE id = ?"
+	if base.Cfg.MustValue("database", "DB_TYPE") == "postgres" {
+		rawSql = "UPDATE \"user\" SET num_followings = num_followings - 1 WHERE id = ?"
+	}
+	if _, err = session.Exec(rawSql, userId); err != nil {
 		session.Rollback()
 		return err
 	}
diff --git a/modules/auth/user.go b/modules/auth/user.go
index 21336cdd98..491ec65aca 100644
--- a/modules/auth/user.go
+++ b/modules/auth/user.go
@@ -18,6 +18,7 @@ import (
 	"github.com/gogits/gogs/modules/log"
 )
 
+// SignedInId returns the id of signed in user.
 func SignedInId(session sessions.Session) int64 {
 	userId := session.Get("userId")
 	if userId == nil {
@@ -32,6 +33,7 @@ func SignedInId(session sessions.Session) int64 {
 	return 0
 }
 
+// SignedInName returns the name of signed in user.
 func SignedInName(session sessions.Session) string {
 	userName := session.Get("userName")
 	if userName == nil {
@@ -43,6 +45,7 @@ func SignedInName(session sessions.Session) string {
 	return ""
 }
 
+// SignedInUser returns the user object of signed user.
 func SignedInUser(session sessions.Session) *models.User {
 	id := SignedInId(session)
 	if id <= 0 {
@@ -57,6 +60,7 @@ func SignedInUser(session sessions.Session) *models.User {
 	return user
 }
 
+// IsSignedIn check if any user has signed in.
 func IsSignedIn(session sessions.Session) bool {
 	return SignedInId(session) > 0
 }
diff --git a/modules/base/base.go b/modules/base/base.go
index 967a78bfbe..7c08dcc5ce 100644
--- a/modules/base/base.go
+++ b/modules/base/base.go
@@ -4,8 +4,6 @@
 
 package base
 
-import ()
-
 type (
 	// Type TmplData represents data in the templates.
 	TmplData map[string]interface{}
diff --git a/modules/base/conf.go b/modules/base/conf.go
index 05412f3872..9ed5545e8a 100644
--- a/modules/base/conf.go
+++ b/modules/base/conf.go
@@ -48,6 +48,7 @@ func init() {
 		fmt.Printf("Cannot load config file '%s'\n", cfgPath)
 		os.Exit(2)
 	}
+	Cfg.BlockMode = false
 
 	cfgPath = filepath.Join(workDir, "custom/conf/app.ini")
 	if com.IsFile(cfgPath) {
diff --git a/modules/middleware/auth.go b/modules/middleware/auth.go
index 743b982976..cf7bee4d22 100644
--- a/modules/middleware/auth.go
+++ b/modules/middleware/auth.go
@@ -8,6 +8,7 @@ import (
 	"github.com/codegangsta/martini"
 )
 
+// SignInRequire requires user to sign in.
 func SignInRequire(redirect bool) martini.Handler {
 	return func(ctx *Context) {
 		if !ctx.IsSigned {
@@ -19,6 +20,7 @@ func SignInRequire(redirect bool) martini.Handler {
 	}
 }
 
+// SignOutRequire requires user to sign out.
 func SignOutRequire() martini.Handler {
 	return func(ctx *Context) {
 		if ctx.IsSigned {
diff --git a/serve.go b/serve.go
index 0289c82c38..fcbde3e5fb 100644
--- a/serve.go
+++ b/serve.go
@@ -1,3 +1,7 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package main
 
 import (
diff --git a/templates/repo/toolbar.tmpl b/templates/repo/toolbar.tmpl
index 49a37ef466..c6e5f5f3c6 100644
--- a/templates/repo/toolbar.tmpl
+++ b/templates/repo/toolbar.tmpl
@@ -4,7 +4,7 @@
             <div class="collapse navbar-collapse">
                 <ul class="nav navbar-nav">
                     <li class="{{if .IsRepoToolbarSource}}active{{end}}"><a href="/{{.RepositoryLink}}">Source</a></li>
-                    <li class="{{if .IsRepoToolbarCommits}}active{{end}}"><a href="/{{.RepositoryLink}}/commits">Commits</a></li>
+                    <li class="{{if .IsRepoToolbarCommits}}active{{end}}"><a href="/{{.RepositoryLink}}/commits/{{.Branchname}}">Commits</a></li>
                     <li class="{{if .IsRepoToolbarBranches}}active{{end}}"><a href="/{{.RepositoryLink}}/branches">Branches</a></li>
                     <li class="{{if .IsRepoToolbarPulls}}active{{end}}"><a href="/{{.RepositoryLink}}/pulls">Pull Requests</a></li>
                     <li class="{{if .IsRepoToolbarIssues}}active{{end}}"><a href="/{{.RepositoryLink}}/issues">Issues <!--<span class="badge">42</span>--></a></li>