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Remove inlined upstream code (#1539) 

Avoid having to maintain inlined code by using Go modules for
`github.com/kylelemons/godebug`.

Signed-off-by: SuperQ <superq@gmail.com>
This commit is contained in:
Ben Kochie 2024-06-20 13:05:41 +02:00 committed by GitHub
parent 33697e636a
commit bccd68204b
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GPG Key ID: B5690EEEBB952194
6 changed files with 4 additions and 430 deletions
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5
NOTICE
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@ -16,8 +16,3 @@ Go support for Protocol Buffers - Google's data interchange format
http://github.com/golang/protobuf/
Copyright 2010 The Go Authors
See source code for license details.
diff - a pretty-printed complete of a Go data structure
https://github.com/kylelemons/godebug
Copyright 2013 Google Inc. All rights reserved.
See source code for license details.

1
go.mod
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@ -8,6 +8,7 @@ require (
github.com/google/go-cmp v0.6.0
github.com/json-iterator/go v1.1.12
github.com/klauspost/compress v1.17.8
github.com/kylelemons/godebug v1.1.0
github.com/prometheus/client_model v0.6.1
github.com/prometheus/common v0.53.0
github.com/prometheus/procfs v0.15.1

2
go.sum
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@ -24,6 +24,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=

193
prometheus/testutil/diff/diff.go
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@ -1,193 +0,0 @@
// Copyright 2013 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// The code in this package is copy/paste to avoid a dependency. Hence this file
// carries the copyright of the original repo.
// https://github.com/kylelemons/godebug/tree/v1.1.0/diff
//
// Package diff implements a linewise diff algorithm.
package diff
import (
"fmt"
"strings"
)
// Chunk represents a piece of the diff. A chunk will not have both added and
// deleted lines. Equal lines are always after any added or deleted lines.
// A Chunk may or may not have any lines in it, especially for the first or last
// chunk in a computation.
type Chunk struct {
Added []string
Deleted []string
Equal []string
}
func (c *Chunk) empty() bool {
return len(c.Added) == 0 && len(c.Deleted) == 0 && len(c.Equal) == 0
}
// Diff returns a string containing a line-by-line unified diff of the linewise
// changes required to make A into B. Each line is prefixed with '+', '-', or
// ' ' to indicate if it should be added, removed, or is correct respectively.
func Diff(A, B string) string {
aLines := strings.Split(A, "\n")
bLines := strings.Split(B, "\n")
return Render(DiffChunks(aLines, bLines))
}
// Render renders the slice of chunks into a representation that prefixes
// the lines with '+', '-', or ' ' depending on whether the line was added,
// removed, or equal (respectively).
func Render(chunks []Chunk) string {
buf := new(strings.Builder)
for _, c := range chunks {
for _, line := range c.Added {
fmt.Fprintf(buf, "+%s\n", line)
}
for _, line := range c.Deleted {
fmt.Fprintf(buf, "-%s\n", line)
}
for _, line := range c.Equal {
fmt.Fprintf(buf, " %s\n", line)
}
}
return strings.TrimRight(buf.String(), "\n")
}
// DiffChunks uses an O(D(N+M)) shortest-edit-script algorithm
// to compute the edits required from A to B and returns the
// edit chunks.
func DiffChunks(a, b []string) []Chunk {
// algorithm: http://www.xmailserver.org/diff2.pdf
// We'll need these quantities a lot.
alen, blen := len(a), len(b) // M, N
// At most, it will require len(a) deletions and len(b) additions
// to transform a into b.
maxPath := alen + blen // MAX
if maxPath == 0 {
// degenerate case: two empty lists are the same
return nil
}
// Store the endpoint of the path for diagonals.
// We store only the a index, because the b index on any diagonal
// (which we know during the loop below) is aidx-diag.
// endpoint[maxPath] represents the 0 diagonal.
//
// Stated differently:
// endpoint[d] contains the aidx of a furthest reaching path in diagonal d
endpoint := make([]int, 2*maxPath+1) // V
saved := make([][]int, 0, 8) // Vs
save := func() {
dup := make([]int, len(endpoint))
copy(dup, endpoint)
saved = append(saved, dup)
}
var editDistance int // D
dLoop:
for editDistance = 0; editDistance <= maxPath; editDistance++ {
// The 0 diag(onal) represents equality of a and b. Each diagonal to
// the left is numbered one lower, to the right is one higher, from
// -alen to +blen. Negative diagonals favor differences from a,
// positive diagonals favor differences from b. The edit distance to a
// diagonal d cannot be shorter than d itself.
//
// The iterations of this loop cover either odds or evens, but not both,
// If odd indices are inputs, even indices are outputs and vice versa.
for diag := -editDistance; diag <= editDistance; diag += 2 { // k
var aidx int // x
switch {
case diag == -editDistance:
// This is a new diagonal; copy from previous iter
aidx = endpoint[maxPath-editDistance+1] + 0
case diag == editDistance:
// This is a new diagonal; copy from previous iter
aidx = endpoint[maxPath+editDistance-1] + 1
case endpoint[maxPath+diag+1] > endpoint[maxPath+diag-1]:
// diagonal d+1 was farther along, so use that
aidx = endpoint[maxPath+diag+1] + 0
default:
// diagonal d-1 was farther (or the same), so use that
aidx = endpoint[maxPath+diag-1] + 1
}
// On diagonal d, we can compute bidx from aidx.
bidx := aidx - diag // y
// See how far we can go on this diagonal before we find a difference.
for aidx < alen && bidx < blen && a[aidx] == b[bidx] {
aidx++
bidx++
}
// Store the end of the current edit chain.
endpoint[maxPath+diag] = aidx
// If we've found the end of both inputs, we're done!
if aidx >= alen && bidx >= blen {
save() // save the final path
break dLoop
}
}
save() // save the current path
}
if editDistance == 0 {
return nil
}
chunks := make([]Chunk, editDistance+1)
x, y := alen, blen
for d := editDistance; d > 0; d-- {
endpoint := saved[d]
diag := x - y
insert := diag == -d || (diag != d && endpoint[maxPath+diag-1] < endpoint[maxPath+diag+1])
x1 := endpoint[maxPath+diag]
var x0, xM, kk int
if insert {
kk = diag + 1
x0 = endpoint[maxPath+kk]
xM = x0
} else {
kk = diag - 1
x0 = endpoint[maxPath+kk]
xM = x0 + 1
}
y0 := x0 - kk
var c Chunk
if insert {
c.Added = b[y0:][:1]
} else {
c.Deleted = a[x0:][:1]
}
if xM < x1 {
c.Equal = a[xM:][:x1-xM]
}
x, y = x0, y0
chunks[d] = c
}
if x > 0 {
chunks[0].Equal = a[:x]
}
if chunks[0].empty() {
chunks = chunks[1:]
}
if len(chunks) == 0 {
return nil
}
return chunks
}

231
prometheus/testutil/diff/diff_test.go
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@ -1,231 +0,0 @@
// Copyright 2013 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// The code in this package is copy/paste to avoid a dependency. Hence this file
// carries the copyright of the original repo.
// https://github.com/kylelemons/godebug/tree/v1.1.0/diff
package diff
import (
"fmt"
"reflect"
"strings"
"testing"
)
func TestDiff(t *testing.T) {
tests := []struct {
desc string
A, B []string
chunks []Chunk
}{
{
desc: "nil",
},
{
desc: "empty",
A: []string{},
B: []string{},
},
{
desc: "same",
A: []string{"foo"},
B: []string{"foo"},
},
{
desc: "a empty",
A: []string{},
},
{
desc: "b empty",
B: []string{},
},
{
desc: "b nil",
A: []string{"foo"},
chunks: []Chunk{
0: {Deleted: []string{"foo"}},
},
},
{
desc: "a nil",
B: []string{"foo"},
chunks: []Chunk{
0: {Added: []string{"foo"}},
},
},
{
desc: "start with change",
A: []string{"a", "b", "c"},
B: []string{"A", "b", "c"},
chunks: []Chunk{
0: {Deleted: []string{"a"}},
1: {Added: []string{"A"}, Equal: []string{"b", "c"}},
},
},
{
desc: "constitution",
A: []string{
"We the People of the United States, in Order to form a more perfect Union,",
"establish Justice, insure domestic Tranquility, provide for the common defence,",
"and secure the Blessings of Liberty to ourselves",
"and our Posterity, do ordain and establish this Constitution for the United",
"States of America.",
},
B: []string{
"We the People of the United States, in Order to form a more perfect Union,",
"establish Justice, insure domestic Tranquility, provide for the common defence,",
"promote the general Welfare, and secure the Blessings of Liberty to ourselves",
"and our Posterity, do ordain and establish this Constitution for the United",
"States of America.",
},
chunks: []Chunk{
0: {
Equal: []string{
"We the People of the United States, in Order to form a more perfect Union,",
"establish Justice, insure domestic Tranquility, provide for the common defence,",
},
},
1: {
Deleted: []string{
"and secure the Blessings of Liberty to ourselves",
},
},
2: {
Added: []string{
"promote the general Welfare, and secure the Blessings of Liberty to ourselves",
},
Equal: []string{
"and our Posterity, do ordain and establish this Constitution for the United",
"States of America.",
},
},
},
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
got := DiffChunks(test.A, test.B)
if got, want := len(got), len(test.chunks); got != want {
t.Errorf("edit distance = %v, want %v", got-1, want-1)
return
}
for i := range got {
got, want := got[i], test.chunks[i]
if got, want := got.Added, want.Added; !reflect.DeepEqual(got, want) {
t.Errorf("chunks[%d]: Added = %v, want %v", i, got, want)
}
if got, want := got.Deleted, want.Deleted; !reflect.DeepEqual(got, want) {
t.Errorf("chunks[%d]: Deleted = %v, want %v", i, got, want)
}
if got, want := got.Equal, want.Equal; !reflect.DeepEqual(got, want) {
t.Errorf("chunks[%d]: Equal = %v, want %v", i, got, want)
}
}
})
}
}
func TestRender(t *testing.T) {
tests := []struct {
desc string
chunks []Chunk
out string
}{
{
desc: "ordering",
chunks: []Chunk{
{
Added: []string{"1"},
Deleted: []string{"2"},
Equal: []string{"3"},
},
{
Added: []string{"4"},
Deleted: []string{"5"},
},
},
out: strings.TrimSpace(`
+1
-2
3
+4
-5
`),
},
{
desc: "only_added",
chunks: []Chunk{
{
Added: []string{"1"},
},
},
out: strings.TrimSpace(`
+1
`),
},
{
desc: "only_deleted",
chunks: []Chunk{
{
Deleted: []string{"1"},
},
},
out: strings.TrimSpace(`
-1
`),
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
if got, want := Render(test.chunks), test.out; got != want {
t.Errorf("Render(%q):", test.chunks)
t.Errorf("GOT\n%s", got)
t.Errorf("WANT\n%s", want)
}
})
}
}
func ExampleDiff() {
constitution := strings.TrimSpace(`
We the People of the United States, in Order to form a more perfect Union,
establish Justice, insure domestic Tranquility, provide for the common defence,
promote the general Welfare, and secure the Blessings of Liberty to ourselves
and our Posterity, do ordain and establish this Constitution for the United
States of America.
`)
got := strings.TrimSpace(`
:wq
We the People of the United States, in Order to form a more perfect Union,
establish Justice, insure domestic Tranquility, provide for the common defence,
and secure the Blessings of Liberty to ourselves
and our Posterity, do ordain and establish this Constitution for the United
States of America.
`)
fmt.Println(Diff(got, constitution))
// Output:
// -:wq
// We the People of the United States, in Order to form a more perfect Union,
// establish Justice, insure domestic Tranquility, provide for the common defence,
// -and secure the Blessings of Liberty to ourselves
// +promote the general Welfare, and secure the Blessings of Liberty to ourselves
// and our Posterity, do ordain and establish this Constitution for the United
// States of America.
}

2
prometheus/testutil/testutil.go
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@ -43,13 +43,13 @@ import (
"io"
"net/http"
"github.com/kylelemons/godebug/diff"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/expfmt"
"google.golang.org/protobuf/proto"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/internal"
"github.com/prometheus/client_golang/prometheus/testutil/diff"
)
// ToFloat64 collects all Metrics from the provided Collector. It expects that