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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,3 @@ | ||
| .idea | ||
| bundle.tar.gz | ||
| opa |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| package lib.sh | ||
|
|
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| test_parse_commands_with_ampersands { | ||
| cmds := sh.parse_commands("apt update && apt install curl") | ||
| count(cmds) == 2 | ||
| cmds[0] == ["apt", "update"] | ||
| cmds[1] == ["apt", "install", "curl"] | ||
| } | ||
|
|
||
| test_parse_commands_empty_input { | ||
| cmds := sh.parse_commands("") | ||
| count(cmds) == 0 | ||
| } | ||
|
|
||
| test_parse_commands_with_semicolon { | ||
| cmds := sh.parse_commands("apt update;apt install curl") | ||
| count(cmds) == 2 | ||
| cmds[0] == ["apt", "update"] | ||
| cmds[1] == ["apt", "install", "curl"] | ||
| } | ||
|
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| test_parse_commands_mixed { | ||
| cmds := sh.parse_commands("apt update; apt install curl && apt install git") | ||
| count(cmds) == 3 | ||
| cmds[0] == ["apt", "update"] | ||
| cmds[1] == ["apt", "install", "curl"] | ||
| cmds[2] == ["apt", "install", "git"] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package rego | ||
|
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| import ( | ||
| "sync" | ||
|
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| opa "github.com/open-policy-agent/opa/rego" | ||
| ) | ||
|
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| var registerOnce sync.Once | ||
|
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| func RegisterBuiltins() { | ||
| registerOnce.Do(func() { | ||
| opa.RegisterBuiltin1(shParseCommandsDecl, shParseCommandsImpl) | ||
| }) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| package rego | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "strings" | ||
|
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| "github.com/open-policy-agent/opa/ast" | ||
| "github.com/open-policy-agent/opa/rego" | ||
| "github.com/open-policy-agent/opa/topdown/builtins" | ||
| "github.com/open-policy-agent/opa/types" | ||
| "mvdan.cc/sh/v3/syntax" | ||
| ) | ||
|
|
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| var shParseCommandsDecl = ®o.Function{ | ||
| Name: "sh.parse_commands", | ||
| Decl: types.NewFunction(types.Args(types.S), types.NewArray(nil, types.NewArray(nil, types.S))), | ||
| Description: "Parse command sequence", | ||
| Memoize: true, | ||
| } | ||
|
|
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| var shParseCommandsImpl = func(c rego.BuiltinContext, a *ast.Term) (*ast.Term, error) { | ||
| astr, err := builtins.StringOperand(a.Value, 0) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("invalid parameter type: %w", err) | ||
| } | ||
|
|
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| commands, err := parseCommands(string(astr)) | ||
|
|
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| if err != nil { | ||
| return nil, fmt.Errorf("parse command sequence error: %w", err) | ||
| } | ||
|
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| var commandsTerm []*ast.Term | ||
| for _, cmd := range commands { | ||
| var cmdTerm []*ast.Term | ||
| for _, cmd_part := range cmd { | ||
| cmdTerm = append(cmdTerm, ast.StringTerm(cmd_part)) | ||
| } | ||
| commandsTerm = append(commandsTerm, ast.ArrayTerm(cmdTerm...)) | ||
| } | ||
|
|
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| return ast.ArrayTerm(commandsTerm...), nil | ||
| } | ||
|
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| func parseCommands(cmdsSeq string) ([][]string, error) { | ||
| f, err := syntax.NewParser().Parse(strings.NewReader(cmdsSeq), "") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| printer := syntax.NewPrinter() | ||
|
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| var commands [][]string | ||
| syntax.Walk(f, func(node syntax.Node) bool { | ||
| switch x := node.(type) { | ||
| case *syntax.CallExpr: | ||
| args := x.Args | ||
| var cmd []string | ||
| for _, word := range args { | ||
| var buffer bytes.Buffer | ||
| printer.Print(&buffer, word) | ||
| cmd = append(cmd, buffer.String()) | ||
| } | ||
| if cmd != nil { | ||
| commands = append(commands, cmd) | ||
| } | ||
| } | ||
| return true | ||
| }) | ||
|
|
||
| return commands, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package rego | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| func TestParseCommands(t *testing.T) { | ||
| tests := []struct { | ||
| cmdsSeq string | ||
| expected [][]string | ||
| }{ | ||
| { | ||
| cmdsSeq: "apt update; apt install -y nginx", | ||
| expected: [][]string{{"apt", "update"}, {"apt", "install", "-y", "nginx"}}, | ||
| }, | ||
| { | ||
| cmdsSeq: "apt update && apt install -y nginx", | ||
| expected: [][]string{{"apt", "update"}, {"apt", "install", "-y", "nginx"}}, | ||
| }, | ||
| { | ||
| cmdsSeq: "apt update || apt install -y nginx", | ||
| expected: [][]string{{"apt", "update"}, {"apt", "install", "-y", "nginx"}}, | ||
| }, | ||
| { | ||
| cmdsSeq: `echo "test;test" ;apt update && apt install -y nginx`, | ||
| expected: [][]string{{"echo", "\"test;test\""}, {"apt", "update"}, {"apt", "install", "-y", "nginx"}}, | ||
| }, | ||
| } | ||
|
|
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| for _, test := range tests { | ||
| t.Run(test.cmdsSeq, func(t *testing.T) { | ||
| got, err := parseCommands(test.cmdsSeq) | ||
| require.NoError(t, err) | ||
| assert.Equal(t, test.expected, got) | ||
| }) | ||
| } | ||
| } |