feat: add retries when downloading terraform releases (#12)

Author: Vince-Chenal

.github/workflows/golangci-lint.yaml

@@ -16,4 +16,4 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v2
         with:
-          version: v1.42
+          version: v1.50.1

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
         name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: 1.19
       -
         name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2

.golangci.yml

@@ -33,7 +33,6 @@ linters:
   - gomoddirectives
   - gomodguard
   - goprintffuncname
-  - ifshort
   - importas
   - makezero
   - misspell

go.mod

@@ -1,22 +1,24 @@
 module github.com/terraform-tools/simple-tfswitch
 
-go 1.17
+go 1.19
 
 require (
 	github.com/Masterminds/semver v1.5.0
-	github.com/hashicorp/terraform-config-inspect v0.0.0-20210625153042-09f34846faab
-	github.com/rogpeppe/go-internal v1.8.0
-	github.com/sirupsen/logrus v1.8.1
+	github.com/hashicorp/go-retryablehttp v0.7.1
+	github.com/hashicorp/terraform-config-inspect v0.0.0-20221020162138-81db043ad408
+	github.com/rogpeppe/go-internal v1.9.0
+	github.com/sirupsen/logrus v1.9.0
 )
 
 require (
 	github.com/agext/levenshtein v1.2.3 // indirect
 	github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect
-	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/hashicorp/hcl/v2 v2.10.1 // indirect
+	github.com/hashicorp/hcl/v2 v2.15.0 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
-	github.com/zclconf/go-cty v1.9.1 // indirect
-	golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 // indirect
-	golang.org/x/text v0.3.7 // indirect
+	github.com/zclconf/go-cty v1.12.1 // indirect
+	golang.org/x/sys v0.2.0 // indirect
+	golang.org/x/text v0.4.0 // indirect
 )

go.sum

@@ -1,92 +1,51 @@
 github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
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-github.com/agext/levenshtein v1.2.2/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=
 github.com/agext/levenshtein v1.2.3 h1:YB2fHEn0UJagG8T1rrWknE3ZQzWM06O8AMAatNn7lmo=
 github.com/agext/levenshtein v1.2.3/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=
-github.com/apparentlymart/go-dump v0.0.0-20180507223929-23540a00eaa3/go.mod h1:oL81AME2rN47vu18xqj1S1jPIPuN7afo62yKTNn3XMM=
-github.com/apparentlymart/go-textseg v1.0.0 h1:rRmlIsPEEhUTIKQb7T++Nz/A5Q6C9IuX2wFoYVvnCs0=
-github.com/apparentlymart/go-textseg v1.0.0/go.mod h1:z96Txxhf3xSFMPmb5X/1W05FF/Nj9VFpLOpjS5yuumk=
 github.com/apparentlymart/go-textseg/v13 v13.0.0 h1:Y+KvPE1NYz0xl601PVImeQfFyEy6iT90AvPUL1NNfNw=
 github.com/apparentlymart/go-textseg/v13 v13.0.0/go.mod h1:ZK2fH7c4NqDTLtiYLvIkEghdlcqw7yxLeM89kiTRPUo=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/go-test/deep v1.0.3 h1:ZrJSEWsXzPOxaZnFteGEfooLba+ju3FYIbOrS+rQd68=
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+golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
+golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/download.go

@@ -3,7 +3,6 @@ package pkg
 import (
 	"fmt"
 	"io"
-	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
@@ -17,7 +16,7 @@ func DownloadFromURL(installLocation string, url string) (string, error) {
 	fileName := tokens[len(tokens)-1]
 	log.Debugf("Downloading to: %s", installLocation)
 
-	response, err := http.Get(url)
+	response, err := HTTPClient().Get(url)
 	if err != nil {
 		log.Errorln("Error while downloading", url, "-", err)
 

pkg/http.go

@@ -0,0 +1,23 @@
+package pkg
+
+import (
+	"net/http"
+	"time"
+
+	retryablehttp "github.com/hashicorp/go-retryablehttp"
+)
+
+const (
+	retryAttempts = 3
+	retryDelay    = 10
+)
+
+func HTTPClient() *http.Client {
+	client := retryablehttp.NewClient()
+	client.RetryMax = retryAttempts
+	client.RetryWaitMin = time.Duration(retryDelay) * time.Second
+	client.RetryWaitMax = client.RetryWaitMin
+	client.Logger = nil // Disables DEBUG logs, failure log is kept.
+
+	return client.StandardClient()
+}

pkg/list_versions.go

@@ -2,8 +2,7 @@ package pkg
 
 import (
 	"fmt"
-	"io/ioutil"
-	"net/http"
+	"io"
 	"os"
 	"regexp"
 	"strings"
@@ -36,7 +35,7 @@ func GetTFList(mirrorURL string, preRelease bool) ([]string, error) {
 	for i := range result {
 		if r.MatchString(result[i]) {
 			str := r.FindString(result[i])
-			trimstr := strings.Trim(str, "/\"") //remove "/" from /X.X.X/
+			trimstr := strings.Trim(str, "/\"") // remove "/" from /X.X.X/
 			tfVersionList.tflist = append(tfVersionList.tflist, trimstr)
 		}
 	}
@@ -54,7 +53,7 @@ func GetTFURLBody(mirrorURL string) ([]string, error) {
 	if !hasSlash { // if does not have slash - append slash
 		mirrorURL = fmt.Sprintf("%s/", mirrorURL)
 	}
-	resp, errURL := http.Get(mirrorURL)
+	resp, errURL := HTTPClient().Get(mirrorURL)
 	if errURL != nil {
 		log.Printf("Getting url: %v", errURL)
 		os.Exit(1)
@@ -69,7 +68,7 @@ func GetTFURLBody(mirrorURL string) ([]string, error) {
 		return nil, fmt.Errorf("retrieving contents from url: %s", mirrorURL)
 	}
 
-	body, errBody := ioutil.ReadAll(resp.Body)
+	body, errBody := io.ReadAll(resp.Body)
 	if errBody != nil {
 		log.Printf("Reading body: %v", errBody)