Golang实用进阶工具
gotests[1]
Generate Go tests from your source code.
go get -u github.com/cweill/gotests/...
gotests -h
Usage of gotests:
-all
generate tests for all functions and methods
-excl string
regexp. generate tests for functions and methods that do not match. Takes precedence over -only, -exported, and -all
-exported
generate tests for exported functions and methods. Takes precedence over -only and -all
-i print test inputs in error messages
-nosubtests
disable generating tests using the Go 1.7 subtests feature
-only string
regexp. generate tests for functions and methods that match only. Takes precedence over -all
-parallel
enable generating parallel subtests
-template string
optional. Specify custom test code templates, e.g. testify. This can also be set via environment variable GOTESTS_TEMPLATE
-template_dir string
optional. Path to a directory containing custom test code templates. Takes precedence over -template. This can also be set via environment variable GOTESTS_TEMPLATE_DIR
-template_params string
read external parameters to template by json with stdin
-template_params_file string
read external parameters to template by json with file
-w write output to (test) files instead of stdout
对 reverse.go:
package main
import "fmt"
//
func main(){
fmt.Println(reverseString("dashen"))
}
// reverse for string.
func reverseString(s string) string {
rs := []rune(s)
l := len(rs)
for f, t := 0, l-1; f < t; f, t = f+1, t-1 {
rs[f], rs[t] = rs[t], rs[f]
}
ns := string(rs)
if l < 10 {
for i := 0; i < 10-l; i++ {
ns = ns + "0"
}
}
return ns
}
执行 gotests -all ./
Generated Test_reverseString
package main
import "testing"
func Test_main(t *testing.T) {
tests := []struct {
name string
}{
// TODO: Add test cases.
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
main()
})
}
}
func Test_reverseString(t *testing.T) {
type args struct {
s string
}
tests := []struct {
name string
args args
want string
}{
// TODO: Add test cases.
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := reverseString(tt.args.s); got != tt.want {
t.Errorf("reverseString() = %v, want %v", got, tt.want)
}
})
}
}
填充测试用例如下:
package main
import "testing"
func Test_reverseString(t *testing.T) {
type args struct {
s string
}
tests := []struct {
name string
args args
want string
}{
{"testcase1", args{"cuishuang"}, "gnauhsiuc0"},
{"testcase2", args{"dashen"}, "nehsad0000"},
// TODO: Add test cases.
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := reverseString(tt.args.s); got != tt.want {
t.Errorf("reverseString() = %v, want %v", got, tt.want)
}
})
}
}
运行单元测试:
=== RUN Test_reverseString
=== RUN Test_reverseString/testcase1
=== RUN Test_reverseString/testcase2
--- PASS: Test_reverseString (0.00s)
--- PASS: Test_reverseString/testcase1 (0.00s)
--- PASS: Test_reverseString/testcase2 (0.00s)
PASS
进程完成，并显示退出代码 0
测试通过.
执行代码覆盖率测试如下：
go test -cover
PASS
coverage: 90.0% of statements
ok dashne 0.880s
(更多参见 Go的测试覆盖率[2])
可见,使用该工具,可以自动生成绝大部分单元测试的代码~
guru[3]
a tool for answering questions about Go source code.
Using Go Guru: an editor-integrated tool for navigating Go code
godepgraph[4]
godepgraph is a program for generating a dependency graph of Go packages.
和go-callvis:极其好用的Go程序调用图生成工具[5]类似
godepgraph -h
go get github.com/kisielk/godepgraph
Usage of godepgraph:
-d (alias for -withgoroot) show dependencies of packages in the Go standard library
-horizontal
lay out the dependency graph horizontally instead of vertically
-i string
(alias for -ignorepackages) a comma-separated list of packages to ignore
-ignorepackages string
a comma-separated list of packages to ignore
-ignoreprefixes string
a comma-separated list of prefixes to ignore
-l int
(alias for -maxlevel) maximum level of the go dependency graph (default 256)
-maxlevel int
max level of go dependency graph (default 256)
-nostdlib
ignore packages in the Go standard library
-novendor
ignore packages in the vendor directory
-o string
(alias for -onlyprefixes) a comma-separated list of prefixes to include
-onlyprefixes string
a comma-separated list of prefixes to include
-p string
(alias for -ignoreprefixes) a comma-separated list of prefixes to ignore
-s (alias for -nostdlib) ignore packages in the Go standard library
-stoponerror
stop on package import errors (default true)
-t (alias for -withtests) include test packages
-tags string
a comma-separated list of build tags to consider satisfied during the build
-withgoroot
show dependencies of packages in the Go standard library
-withtests
include test packages
godepgraph 某个文件或某个github项目
会生成文字版的引用关系
如 如对于b_sql.go, 代码如下:
package main
import (
"fmt"
"github.com/davecgh/go-spew/spew"
"github.com/jinzhu/gorm"
_ "github.com/jinzhu/gorm/dialects/mysql"
"time"
)
func main() {
db, err := gorm.Open("mysql", "root:12345678@/dashen?charset=utf8&parseTime=True&loc=Local")
if err != nil {
panic(err)
}
defer db.Close()
books, err := GetBooksInfo(db, 0, 10, "*", "", "", "id < ? ", 126)
spew.Println("books are:", books)
books2, err2 := GetBooksInfo(db, 0, 10, "*", "", ",(select*from(select+sleep(2)union/**/select+1)a)", "id < ? ", 126)
spew.Println("books2, err2", books2, err2)
}
type A struct {
Id int `gorm:"column:id;primary_key;AUTO_INCREMENT" json:"id"`
Name string `gorm:"column:name" json:"name"`
Book string `gorm:"column:book" json:"book"`
CreateTime time.Time `gorm:"column:create_time;default:CURRENT_TIMESTAMP" json:"create_time"`
}
func (A) TableName() string {
return "a"
}
func GetBooksInfo(db *gorm.DB, offset, limit int, field, order, sort, where string, params ...interface{}) (res []*A, err error) {
db = db.Select(field).Where(where, params...)
if order == "" {
order = "create_time"
}
if sort == "" {
sort = "DESC"
}
db = db.Order(order + " " + sort)
if limit > 0 {
db = db.Limit(limit)
}
if offset > 0 {
db = db.Offset(offset)
}
err = db.Find(&res).Error
if err != nil {
fmt.Printf("GetBooksInfo error (%+v): where (%s), params (%+v)\n", err, where, params)
return
}
if res == nil {
fmt.Printf("GetBooksInfo empty: where (%s), params (%+v)\n", where, params)
res = make([]*A, 0)
}
return
}
执行 godepgraph b_sql.go :
digraph godep {
splines=ortho
nodesep=0.4
ranksep=0.8
node [shape="box",style="rounded,filled"]
edge [arrowsize="0.5"]
"b_sql.go" [label="b_sql.go" color="paleturquoise" URL="https://godoc.org/b_sql.go" target="_blank"];
"b_sql.go" -> "fmt";
"b_sql.go" -> "github.com/davecgh/go-spew/spew";
"b_sql.go" -> "github.com/jinzhu/gorm";
"b_sql.go" -> "github.com/jinzhu/gorm/dialects/mysql";
"b_sql.go" -> "time";
"bytes" [label="bytes" color="palegreen" URL="https://godoc.org/bytes" target="_blank"];
"context" [label="context" color="palegreen" URL="https://godoc.org/context" target="_blank"];
"crypto/rand" [label="crypto/rand" color="palegreen" URL="https://godoc.org/crypto/rand" target="_blank"];
"crypto/rsa" [label="crypto/rsa" color="palegreen" URL="https://godoc.org/crypto/rsa" target="_blank"];
"crypto/sha1" [label="crypto/sha1" color="palegreen" URL="https://godoc.org/crypto/sha1" target="_blank"];
"crypto/sha256" [label="crypto/sha256" color="palegreen" URL="https://godoc.org/crypto/sha256" target="_blank"];
"crypto/tls" [label="crypto/tls" color="palegreen" URL="https://godoc.org/crypto/tls" target="_blank"];
"crypto/x509" [label="crypto/x509" color="palegreen" URL="https://godoc.org/crypto/x509" target="_blank"];
"database/sql" [label="database/sql" color="palegreen" URL="https://godoc.org/database/sql" target="_blank"];
"database/sql/driver" [label="database/sql/driver" color="palegreen" URL="https://godoc.org/database/sql/driver" target="_blank"];
"encoding/binary" [label="encoding/binary" color="palegreen" URL="https://godoc.org/encoding/binary" target="_blank"];
"encoding/hex" [label="encoding/hex" color="palegreen" URL="https://godoc.org/encoding/hex" target="_blank"];
"encoding/json" [label="encoding/json" color="palegreen" URL="https://godoc.org/encoding/json" target="_blank"];
"encoding/pem" [label="encoding/pem" color="palegreen" URL="https://godoc.org/encoding/pem" target="_blank"];
"errors" [label="errors" color="palegreen" URL="https://godoc.org/errors" target="_blank"];
"fmt" [label="fmt" color="palegreen" URL="https://godoc.org/fmt" target="_blank"];
"github.com/davecgh/go-spew/spew" [label="github.com/davecgh/go-spew/spew" color="paleturquoise" URL="https://godoc.org/github.com/davecgh/go-spew/spew" target="_blank"];
"github.com/davecgh/go-spew/spew" -> "bytes";
"github.com/davecgh/go-spew/spew" -> "encoding/hex";
"github.com/davecgh/go-spew/spew" -> "fmt";
"github.com/davecgh/go-spew/spew" -> "io";
"github.com/davecgh/go-spew/spew" -> "os";
"github.com/davecgh/go-spew/spew" -> "reflect";
"github.com/davecgh/go-spew/spew" -> "regexp";
"github.com/davecgh/go-spew/spew" -> "sort";
"github.com/davecgh/go-spew/spew" -> "strconv";
"github.com/davecgh/go-spew/spew" -> "strings";
"github.com/davecgh/go-spew/spew" -> "unsafe";
"github.com/go-sql-driver/mysql" [label="github.com/go-sql-driver/mysql" color="paleturquoise" URL="https://godoc.org/github.com/go-sql-driver/mysql" target="_blank"];
"github.com/go-sql-driver/mysql" -> "bytes";
"github.com/go-sql-driver/mysql" -> "context";
"github.com/go-sql-driver/mysql" -> "crypto/rand";
"github.com/go-sql-driver/mysql" -> "crypto/rsa";
"github.com/go-sql-driver/mysql" -> "crypto/sha1";
"github.com/go-sql-driver/mysql" -> "crypto/sha256";
"github.com/go-sql-driver/mysql" -> "crypto/tls";
"github.com/go-sql-driver/mysql" -> "crypto/x509";
"github.com/go-sql-driver/mysql" -> "database/sql";
"github.com/go-sql-driver/mysql" -> "database/sql/driver";
"github.com/go-sql-driver/mysql" -> "encoding/binary";
"github.com/go-sql-driver/mysql" -> "encoding/pem";
"github.com/go-sql-driver/mysql" -> "errors";
"github.com/go-sql-driver/mysql" -> "fmt";
"github.com/go-sql-driver/mysql" -> "io";
"github.com/go-sql-driver/mysql" -> "log";
"github.com/go-sql-driver/mysql" -> "math";
"github.com/go-sql-driver/mysql" -> "math/big";
"github.com/go-sql-driver/mysql" -> "net";
"github.com/go-sql-driver/mysql" -> "net/url";
"github.com/go-sql-driver/mysql" -> "os";
"github.com/go-sql-driver/mysql" -> "reflect";
"github.com/go-sql-driver/mysql" -> "sort";
"github.com/go-sql-driver/mysql" -> "strconv";
"github.com/go-sql-driver/mysql" -> "strings";
"github.com/go-sql-driver/mysql" -> "sync";
"github.com/go-sql-driver/mysql" -> "sync/atomic";
"github.com/go-sql-driver/mysql" -> "syscall";
"github.com/go-sql-driver/mysql" -> "time";
"github.com/jinzhu/gorm" [label="github.com/jinzhu/gorm" color="paleturquoise" URL="https://godoc.org/github.com/jinzhu/gorm" target="_blank"];
"github.com/jinzhu/gorm" -> "bytes";
"github.com/jinzhu/gorm" -> "context";
"github.com/jinzhu/gorm" -> "crypto/sha1";
"github.com/jinzhu/gorm" -> "database/sql";
"github.com/jinzhu/gorm" -> "database/sql/driver";
"github.com/jinzhu/gorm" -> "encoding/json";
"github.com/jinzhu/gorm" -> "errors";
"github.com/jinzhu/gorm" -> "fmt";
"github.com/jinzhu/gorm" -> "github.com/jinzhu/inflection";
"github.com/jinzhu/gorm" -> "go/ast";
"github.com/jinzhu/gorm" -> "log";
"github.com/jinzhu/gorm" -> "os";
"github.com/jinzhu/gorm" -> "reflect";
"github.com/jinzhu/gorm" -> "regexp";
"github.com/jinzhu/gorm" -> "runtime";
"github.com/jinzhu/gorm" -> "sort";
"github.com/jinzhu/gorm" -> "strconv";
"github.com/jinzhu/gorm" -> "strings";
"github.com/jinzhu/gorm" -> "sync";
"github.com/jinzhu/gorm" -> "time";
"github.com/jinzhu/gorm" -> "unicode";
"github.com/jinzhu/gorm" -> "unicode/utf8";
"github.com/jinzhu/gorm/dialects/mysql" [label="github.com/jinzhu/gorm/dialects/mysql" color="paleturquoise" URL="https://godoc.org/github.com/jinzhu/gorm/dialects/mysql" target="_blank"];
"github.com/jinzhu/gorm/dialects/mysql" -> "github.com/go-sql-driver/mysql";
"github.com/jinzhu/inflection" [label="github.com/jinzhu/inflection" color="paleturquoise" URL="https://godoc.org/github.com/jinzhu/inflection" target="_blank"];
"github.com/jinzhu/inflection" -> "regexp";
"github.com/jinzhu/inflection" -> "strings";
"go/ast" [label="go/ast" color="palegreen" URL="https://godoc.org/go/ast" target="_blank"];
"io" [label="io" color="palegreen" URL="https://godoc.org/io" target="_blank"];
"log" [label="log" color="palegreen" URL="https://godoc.org/log" target="_blank"];
"math" [label="math" color="palegreen" URL="https://godoc.org/math" target="_blank"];
"math/big" [label="math/big" color="palegreen" URL="https://godoc.org/math/big" target="_blank"];
"net" [label="net" color="palegreen" URL="https://godoc.org/net" target="_blank"];
"net/url" [label="net/url" color="palegreen" URL="https://godoc.org/net/url" target="_blank"];
"os" [label="os" color="palegreen" URL="https://godoc.org/os" target="_blank"];
"reflect" [label="reflect" color="palegreen" URL="https://godoc.org/reflect" target="_blank"];
"regexp" [label="regexp" color="palegreen" URL="https://godoc.org/regexp" target="_blank"];
"runtime" [label="runtime" color="palegreen" URL="https://godoc.org/runtime" target="_blank"];
"sort" [label="sort" color="palegreen" URL="https://godoc.org/sort" target="_blank"];
"strconv" [label="strconv" color="palegreen" URL="https://godoc.org/strconv" target="_blank"];
"strings" [label="strings" color="palegreen" URL="https://godoc.org/strings" target="_blank"];
"sync" [label="sync" color="palegreen" URL="https://godoc.org/sync" target="_blank"];
"sync/atomic" [label="sync/atomic" color="palegreen" URL="https://godoc.org/sync/atomic" target="_blank"];
"syscall" [label="syscall" color="palegreen" URL="https://godoc.org/syscall" target="_blank"];
"time" [label="time" color="palegreen" URL="https://godoc.org/time" target="_blank"];
"unicode" [label="unicode" color="palegreen" URL="https://godoc.org/unicode" target="_blank"];
"unicode/utf8" [label="unicode/utf8" color="palegreen" URL="https://godoc.org/unicode/utf8" target="_blank"];
"unsafe" [label="unsafe" color="palegreen" URL="https://godoc.org/unsafe" target="_blank"];
}
配合dot命令生成调用关系图
➘
dot命令[6]是graphviz的一部分，通过编写一些类似脚本的语言，可以容易地生成流程图,
格式：dot -T -o
输入文件是
其中-T 包括：
-Tps (PostScript),
-Tsvg -Tsvgz (Structured Vector Graphics),
-Tfig (XFIG graphics),
-Tmif (FrameMaker graphics),
-Thpgl (HP pen plotters),
-Tpcl (Laserjet printers),
-Tpng -Tgif (bitmap graphics),
-Tdia (GTK+ based diagrams),
-Timap (imagemap files for httpd servers for each node or edge that has a non-null "href" attribute.),
-Tcmapx (client-side imagemap for use in html and xhtml).
➚
godepgraph b_sql.go | dot -Tsvg -o shuang.svg
gomodifytags[7]
参考 gomodifytags:好用的struct标签操作工具[8]
goreturns[9]
A gofmt/goimports-like tool for Go programmers that fills in Go return statements with zero values to match the func return types
填充方法返回类型的零值
package b_demo
import "errors"
func F() (int, error) { return errors.New("foo") }
goreturns 文件名.go
package b_demo
import "errors"
func F() (int, error) { return 0, errors.New("foo") }
depth[10]
Visualize Go Dependency Trees
go get github.com/KyleBanks/depth/cmd/depth
depth -h
Usage of depth:
-explain string
If set, show which packages import the specified target
-internal
If set, resolves dependencies of internal (stdlib) packages.
-json
If set, outputs the depencies in JSON format.
-max int
Sets the maximum depth of dependencies to resolve.
-test
If set, resolves dependencies used for testing.
depth 某个第三方库
depth -internal 某个官方标准库
如:
depth -internal strings:
strings
├ errors
└ internal/reflectlite
├ runtime
├ internal/bytealg
├ internal/cpu
└ unsafe
├ internal/cpu
├ runtime/internal/atomic
└ unsafe
├ runtime/internal/math
└ runtime/internal/sys
├ runtime/internal/sys
└ unsafe
└ unsafe
├ internal/bytealg
├ io
├ errors
└ sync
├ internal/race
└ unsafe
├ runtime
├ sync/atomic
└ unsafe
└ unsafe
├ sync
├ unicode
├ unicode/utf8
└ unsafe
15 dependencies (15 internal, 0 external, 0 testing).
又如:
depth -internal fmt:
fmt
├ errors
└ internal/reflectlite
├ runtime
├ internal/bytealg
├ internal/cpu
└ unsafe
├ internal/cpu
├ runtime/internal/atomic
└ unsafe
├ runtime/internal/math
└ runtime/internal/sys
├ runtime/internal/sys
└ unsafe
└ unsafe
├ internal/fmtsort
├ reflect
├ math
├ internal/cpu
├ math/bits
└ unsafe
└ unsafe
├ runtime
├ strconv
├ errors
├ internal/bytealg
├ math
├ math/bits
└ unicode/utf8
├ sync
├ internal/race
└ unsafe
├ runtime
├ sync/atomic
└ unsafe
└ unsafe
├ unicode
├ unicode/utf8
└ unsafe
└ sort
└ internal/reflectlite
├ io
├ errors
└ sync
├ math
├ os
├ errors
├ internal/oserror
└ errors
├ internal/poll
├ errors
├ io
├ runtime
├ sync
├ sync/atomic
├ syscall
├ errors
├ internal/bytealg
├ internal/oserror
├ internal/race
├ runtime
├ sync
└ unsafe
├ time
├ errors
├ runtime
├ sync
├ syscall
└ unsafe
└ unsafe
├ internal/syscall/execenv
└ syscall
├ internal/syscall/unix
├ syscall
└ unsafe
├ internal/testlog
└ sync/atomic
├ io
├ runtime
├ sync
├ sync/atomic
├ syscall
├ time
└ unsafe
├ reflect
├ strconv
├ sync
└ unicode/utf8
29 dependencies (29 internal, 0 external, 0 testing).
interface[11]
实用价值不高~
safesql[12]
SafeSQL是Go的静态分析工具，可以防止SQL注入
可用来分析项目中可能存在的sql注入隐患
aligncheck && structcheck && varcheck[13]
go get -u gitlab.com/opennota/check/cmd/aligncheck
go get -u gitlab.com/opennota/check/cmd/structcheck
go get -u gitlab.com/opennota/check/cmd/varcheck
新版本Go用 go install gitlab.com/opennota/check/cmd/aligncheck@latest 安装
找寻效率低下的结构体
可以是某个官方包,也可以是某个文件
golangci-lint里的 maligned也有该功能
Golang 的内存对齐[14]
aligncheck net/http
得到:
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:1507:6: struct http2Framer could have size 200 (currently 216)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:2274:6: struct http2HeadersFrameParam could have size 40 (currently 48)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:4058:6: struct http2serverConn could have size 368 (currently 384)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:4140:6: struct http2stream could have size 152 (currently 168)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:5851:6: struct http2requestBody could have size 32 (currently 40)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:6559:6: struct http2Transport could have size 80 (currently 88)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:6698:6: struct http2ClientConn could have size 368 (currently 384)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:6746:6: struct http2clientStream could have size 312 (currently 328)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:9252:6: struct http2writeData could have size 32 (currently 40)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:9335:6: struct http2writeResHeaders could have size 96 (currently 104)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/h2_bundle.go:9407:6: struct http2writePushPromise could have size 48 (currently 56)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/server.go:3294:6: struct timeoutWriter could have size 88 (currently 96)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/server.go:418:6: struct response could have size 200 (currently 224)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/server.go:653:6: struct connReader could have size 40 (currently 48)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/transfer.go:59:6: struct transferWriter could have size 128 (currently 152)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/transport.go:1103:6: struct wantConn could have size 168 (currently 176)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/transport.go:1768:6: struct persistConn could have size 264 (currently 280)
net/http: /usr/local/opt/go@1.14/libexec/src/net/http/transport.go:95:6: struct Transport could have size 288 (currently 304)
找到没有用到的结构体字段
structcheck --help
Usage of structcheck:
-a Count assignments only
-e Report exported fields
-t Load test files too
-tags string
Build tags
structcheck fmt
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/scan.go:169:2: fmt.ssave.nlIsEnd
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/scan.go:170:2: fmt.ssave.nlIsSpace
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/scan.go:171:2: fmt.ssave.argLimit
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/scan.go:172:2: fmt.ssave.limit
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/scan.go:173:2: fmt.ssave.maxWid
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:25:2: fmt.fmtFlags.precPresent
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:26:2: fmt.fmtFlags.minus
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:27:2: fmt.fmtFlags.plus
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:28:2: fmt.fmtFlags.sharp
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:30:2: fmt.fmtFlags.zero
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:24:2: fmt.fmtFlags.widPresent
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:35:2: fmt.fmtFlags.plusV
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:36:2: fmt.fmtFlags.sharpV
fmt: /usr/local/opt/go@1.14/libexec/src/fmt/format.go:29:2: fmt.fmtFlags.space
找到没有用到的全局变量和常量
varcheck --help
Usage of varcheck:
-e Report exported variables and constants
-tags string
Build tags
varcheck image/jpeg
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/reader.go:74:2: adobeTransformYCbCr
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/reader.go:75:2: adobeTransformYCbCrK
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/writer.go:54:2: quantIndexLuminance
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/writer.go:55:2: quantIndexChrominance
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/writer.go:91:2: huffIndexLuminanceDC
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/writer.go:92:2: huffIndexLuminanceAC
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/writer.go:93:2: huffIndexChrominanceDC
image/jpeg: /usr/local/opt/go@1.14/libexec/src/image/jpeg/writer.go:94:2: huffIndexChrominanceAC
eg[15]
golang/tools[16]
eg -h
Usage of eg:
-beforeedit string
A command to exec before each file is edited (e.g. chmod, checkout). Whitespace delimits argument words. The string '{}' is replaced by the file name.
-help
show detailed help message
-t string
template.go file specifying the refactoring
-transitive
apply refactoring to all dependencies too
-v show verbose matcher diagnostics
-w rewrite input files in place (by default, the results are printed to standard output)
参考:
Go语言不完全工具列表[17]
golang/tools[18]
代码自动完成（使用gocode）
快速提示信息（使用godef）
跳转到定义（使用godef）
搜索参考引用（使用go-find-references）
文件大纲（使用go-outline）
重命名（使用gorename）
保存构建（使用go build和go test）
代码格式化（使用goreturns或goimports或gofmt）
调试代码（使用delve）
参考资料
[1]gotests: https://github.com/cweill/gotests
[2]Go的测试覆盖率: https://brantou.github.io/2017/05/24/go-cover-story/
[3]guru: https://pkg.go.dev/golang.org/x/tools/cmd/guru
[4]godepgraph: github.com/kisielk/godepgraph
[5]go-callvis:极其好用的Go程序调用图生成工具: https://dashen.tech/2016/04/15/go-callvis-极其好用的Go程序调用图生成工具/#go-list
[6]dot命令: https://blog.csdn.net/u012313689/article/details/53070039
[7]gomodifytags: https://github.com/fatih/gomodifytags
[8]gomodifytags:好用的struct标签操作工具: https://dashen.tech/2016/04/16/gomodifytags-%E5%A5%BD%E7%94%A8%E7%9A%84struct%E6%A0%87%E7%AD%BE%E6%93%8D%E4%BD%9C%E5%B7%A5%E5%85%B7/
[9]goreturns: sourcegraph.com/sqs/goreturns
[10]depth: https://github.com/KyleBanks/depth
[11]interface: https://github.com/mvdan/interfacer
[12]safesql: https://github.com/stripe/safesql
[13]aligncheck && structcheck && varcheck: https://gitlab.com/opennota/check
[14]Golang 的内存对齐: https://kiosk007.top/post/golang-%E7%9A%84%E5%86%85%E5%AD%98%E5%AF%B9%E9%BD%90/
[15]eg: https://pkg.go.dev/golang.org/x/tools/cmd/eg
[16]golang/tools: https://github.com/golang/tools/blob/v0.1.1/cmd/eg/eg.go
[17]Go语言不完全工具列表: https://brantou.github.io//2017/11/24/go-tool/
[18]golang/tools: https://github.com/golang/tools/tree/v0.1.1/cmd
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