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Add tf_validation_backend tool to the hack dir
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| # tf_validation_backend | ||
|
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| This module shows how to fetch the backend block from a Terraform configuration file. | ||
|
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| ## How to use | ||
|
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| You can run the `tf_validation_backend.go` to fetch the backend name from a `.tf` file. | ||
|
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| ```bash | ||
| go run tf_validation_backend.go ${path_to_your_tf_file} | ||
| ``` | ||
|
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| ## What's more | ||
|
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| Actually, the function `fetchBackendName` in `tf_validation_backend.go` is just a simple demo. You can extend it to get more information about the backend configuration. As you can see, all the attributes and blocks in the backend block are parsed into the `Remain` field which type is [hcl.Body](https://pkg.go.dev/github.com/hashicorp/hcl/[email protected]?utm_source=gopls#Body). We can get all the information by accessing the fields of the [hcl.Body](https://pkg.go.dev/github.com/hashicorp/hcl/[email protected]?utm_source=gopls#Body). | ||
|
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| For example, the following code prints all the keys of the attributes of the backend block. | ||
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| ```go | ||
| attrsMap, _ := config.Terraform.Backend.Remain.JustAttributes() | ||
| for k := range attrsMap { | ||
| fmt.Println(k) | ||
| } | ||
| ``` | ||
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| Original file line number | Diff line number | Diff line change |
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| module tf_validation_backend | ||
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| go 1.17 | ||
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| require github.com/hashicorp/hcl/v2 v2.11.1 | ||
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| require ( | ||
| github.com/agext/levenshtein v1.2.3 // indirect | ||
| github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect | ||
| github.com/google/go-cmp v0.5.7 // indirect | ||
| github.com/mitchellh/go-wordwrap v1.0.1 // indirect | ||
| github.com/zclconf/go-cty v1.10.0 // indirect | ||
| golang.org/x/text v0.3.7 // indirect | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| github.com/agext/levenshtein v1.2.1 h1:QmvMAjj2aEICytGiWzmxoE0x2KZvE0fvmqMOfy2tjT8= | ||
| github.com/agext/levenshtein v1.2.1/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 v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= | ||
| github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/go-test/deep v1.0.3 h1:ZrJSEWsXzPOxaZnFteGEfooLba+ju3FYIbOrS+rQd68= | ||
| github.com/go-test/deep v1.0.3/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA= | ||
| github.com/golang/protobuf v1.1.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= | ||
| github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= | ||
| github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw= | ||
| github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg= | ||
| github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= | ||
| github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o= | ||
| github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE= | ||
| github.com/hashicorp/hcl/v2 v2.11.1 h1:yTyWcXcm9XB0TEkyU/JCRU6rYy4K+mgLtzn2wlrJbcc= | ||
| github.com/hashicorp/hcl/v2 v2.11.1/go.mod h1:FwWsfWEjyV/CMj8s/gqAuiviY72rJ1/oayI9WftqcKg= | ||
| github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI= | ||
| github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo= | ||
| github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ= | ||
| github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE= | ||
| github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= | ||
| github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348 h1:MtvEpTB6LX3vkb4ax0b5D2DHbNAUsen0Gx5wZoq3lV4= | ||
| github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348/go.mod h1:B69LEHPfb2qLo0BaaOLcbitczOKLWTsrBG9LczfCD4k= | ||
| github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7 h1:DpOJ2HYzCv8LZP15IdmG+YdwD2luVPHITV96TkirNBM= | ||
| github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7/go.mod h1:ZXFpozHsX6DPmq2I0TCekCxypsnAUbP2oI0UX1GXzOo= | ||
| github.com/mitchellh/go-wordwrap v1.0.1 h1:TLuKupo69TCn6TQSyGxwI1EblZZEsQ0vMlAFQflz0v0= | ||
| github.com/mitchellh/go-wordwrap v1.0.1/go.mod h1:R62XHJLzvMFRBbcrT7m7WgmE1eOyTSsCt+hzestvNj0= | ||
| github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= | ||
| github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ= | ||
| github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo= | ||
| github.com/spf13/pflag v1.0.2/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4= | ||
| github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= | ||
| github.com/vmihailenco/msgpack v3.3.3+incompatible/go.mod h1:fy3FlTQTDXWkZ7Bh6AcGMlsjHatGryHQYUTf1ShIgkk= | ||
| github.com/vmihailenco/msgpack/v4 v4.3.12/go.mod h1:gborTTJjAo/GWTqqRjrLCn9pgNN+NXzzngzBKDPIqw4= | ||
| github.com/vmihailenco/tagparser v0.1.1/go.mod h1:OeAg3pn3UbLjkWt+rN9oFYB6u/cQgqMEUPoW2WPyhdI= | ||
| github.com/zclconf/go-cty v1.2.0/go.mod h1:hOPWgoHbaTUnI5k4D2ld+GRpFJSCe6bCM7m1q/N4PQ8= | ||
| github.com/zclconf/go-cty v1.8.0 h1:s4AvqaeQzJIu3ndv4gVIhplVD0krU+bgrcLSVUnaWuA= | ||
| github.com/zclconf/go-cty v1.8.0/go.mod h1:vVKLxnk3puL4qRAv72AO+W99LUD4da90g3uUAzyuvAk= | ||
| github.com/zclconf/go-cty v1.10.0 h1:mp9ZXQeIcN8kAwuqorjH+Q+njbJKjLrvB2yIh4q7U+0= | ||
| github.com/zclconf/go-cty v1.10.0/go.mod h1:vVKLxnk3puL4qRAv72AO+W99LUD4da90g3uUAzyuvAk= | ||
| github.com/zclconf/go-cty-debug v0.0.0-20191215020915-b22d67c1ba0b/go.mod h1:ZRKQfBXbGkpdV6QMzT3rU1kSTAnfu1dO8dPKjYprgj8= | ||
| golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= | ||
| golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= | ||
| golang.org/x/net v0.0.0-20180811021610-c39426892332/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= | ||
| golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= | ||
| golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= | ||
| golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= | ||
| golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= | ||
| golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= | ||
| golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= | ||
| golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk= | ||
| golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ= | ||
| golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= | ||
| golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk= | ||
| golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ= | ||
| golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= | ||
| golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= | ||
| google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc= | ||
| gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= |
71 changes: 71 additions & 0 deletions
71
hack/tool/validation/tf_validation_backend/tf_validation_backend.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| /* | ||
| Copyright 2022 The KubeVela Authors. | ||
|
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| 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 | ||
|
|
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| http://www.apache.org/licenses/LICENSE-2.0 | ||
|
|
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| 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. | ||
| */ | ||
|
|
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| package main | ||
|
|
||
| import ( | ||
| "errors" | ||
| "log" | ||
| "os" | ||
|
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| "github.com/hashicorp/hcl/v2" | ||
| "github.com/hashicorp/hcl/v2/gohcl" | ||
| "github.com/hashicorp/hcl/v2/hclparse" | ||
| ) | ||
|
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| // Config describes the schema of a whole tf file. | ||
| type Config struct { | ||
| Remain interface{} `hcl:",remain"` | ||
| Terraform struct { | ||
| Remain interface{} `hcl:",remain"` | ||
| Backend *BackendConfig `hcl:"backend,block"` | ||
| } `hcl:"terraform,block"` | ||
| } | ||
|
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| // BackendConfig describes the schema of the backend block. | ||
| type BackendConfig struct { | ||
| Name string `hcl:"name,label"` | ||
| Remain hcl.Body `hcl:",remain"` | ||
| } | ||
|
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| func fetchBackendName(body hcl.Body) (string, error) { | ||
| var config Config | ||
| diags := gohcl.DecodeBody(body, nil, &config) | ||
| if diags.HasErrors() { | ||
| return "", diags | ||
| } | ||
| backendConf := config.Terraform.Backend | ||
| if backendConf == nil { | ||
| return "", errors.New("can not find the \"backend block\"") | ||
| } | ||
| return backendConf.Name, nil | ||
| } | ||
|
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| func main() { | ||
| if len(os.Args) < 2 { | ||
| log.Fatalln("can not parse filename from args") | ||
| } | ||
| filename := os.Args[1] | ||
| file, diags := hclparse.NewParser().ParseHCLFile(filename) | ||
| if diags.HasErrors() { | ||
| log.Fatalln(diags.Error()) | ||
| } | ||
| backendName, err := fetchBackendName(file.Body) | ||
| if err != nil { | ||
| log.Fatalln(err.Error()) | ||
| } | ||
| log.Printf("fetch the name of backend: %s\n", backendName) | ||
| } |
94 changes: 94 additions & 0 deletions
94
hack/tool/validation/tf_validation_backend/tf_validation_backend_test.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| Copyright 2022 The KubeVela Authors. | ||
|
|
||
| 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. | ||
| */ | ||
|
|
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| package main | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/hashicorp/hcl/v2/hclparse" | ||
| ) | ||
|
|
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| func Test_fetchBackendName(t *testing.T) { | ||
| tests := []struct { | ||
| name string | ||
| hcl string | ||
| want string | ||
| wantErr bool | ||
| }{ | ||
| { | ||
| name: "valid backend block", | ||
| hcl: ` | ||
| terraform { | ||
| backend "remote" { | ||
| workspace { | ||
| prefix = "test_" | ||
| } | ||
| } | ||
| } | ||
| `, | ||
| want: "remote", | ||
| wantErr: false, | ||
| }, | ||
| { | ||
| name: "empty backend block", | ||
| hcl: ` | ||
| terraform { | ||
| backend "remote" { | ||
| } | ||
| } | ||
| `, | ||
| want: "remote", | ||
| wantErr: false, | ||
| }, | ||
| { | ||
| name: "invalid backend block", | ||
| hcl: ` | ||
| terraform { | ||
| backend { | ||
| workspace { | ||
| prefix = "test_" | ||
| } | ||
| } | ||
| } | ||
| `, | ||
| want: "", | ||
| wantErr: true, | ||
| }, | ||
| { | ||
| name: "no backend block", | ||
| hcl: ` | ||
| terraform { | ||
| } | ||
| `, | ||
| want: "", | ||
| wantErr: true, | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| file, _ := hclparse.NewParser().ParseHCL([]byte(tt.hcl), "test.tf") | ||
| got, err := fetchBackendName(file.Body) | ||
| if (err != nil) != tt.wantErr { | ||
| t.Errorf("fetchBackendName() error = %v, wantErr %v", err, tt.wantErr) | ||
| return | ||
| } | ||
| if got != tt.want { | ||
| t.Errorf("fetchBackendName() = %v, want %v", got, tt.want) | ||
| } | ||
| }) | ||
| } | ||
| } |
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What does
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validationmeans that if the backend block is invalid, the tool will report an error.emmm, maybe it woudl be better to use
fetch?