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@Dav-14 Dav-14 commented Jul 30, 2025

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@Dav-14 Dav-14 requested a review from a team as a code owner July 30, 2025 10:37
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coderabbitai bot commented Jul 30, 2025

"""

Walkthrough

A new Go file introduces a command-line tool that exports the structure and metadata of a Cobra-based CLI application to a JSON file. The tool defines data structures for commands and flags, recursively traverses the command hierarchy, collects relevant metadata, and writes the information to "inventory.json".

Changes

Cohort / File(s) Change Summary
Command Usage Export Tool
tools/commandusage/export.go
Implements a CLI tool to export Cobra command and flag metadata to JSON, including recursive traversal, data struct definitions, file handling, and error management.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

A rabbit hopped through code so bright,
Exporting commands by day and night.
With JSON carrots in its file,
It mapped each flag and nested style.
Now inventory’s clear as spring—
Oh, what joy these exports bring!
🥕
"""

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Reviewing files that changed from the base of the PR and between 20c8403 and 3570ba6.

⛔ Files ignored due to path filters (2)
  • go.mod is excluded by !**/*.mod
  • tools/commandusage/inventory.json is excluded by !**/*.json
📒 Files selected for processing (1)
  • tools/commandusage/export.go (1 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
  • tools/commandusage/export.go
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@Dav-14 Dav-14 force-pushed the feat/export_fctl_command_as_json_ branch from 531459e to 20c8403 Compare July 30, 2025 10:38
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Actionable comments posted: 5

🧹 Nitpick comments (3)
tools/commandusage/export.go (3)

13-15: Consider making the output filename configurable.

The hardcoded filename limits flexibility. Consider making this configurable via a command-line flag or environment variable for better usability.

-var (
-	file = "inventory.json"
-)
+var (
+	outputFile = flag.String("output", "inventory.json", "Output JSON file")
+)

17-24: Review field redundancy in Flag struct.

Both Description and Usage fields are populated with the same value (f.Usage) in the flagSetToFlags function (lines 48, 51). Consider if both fields are necessary or if they should serve different purposes.

If they serve the same purpose, consider removing one:

 type Flag struct {
 	Name         string `json:"name"`
 	Description  string `json:"description"`
 	Deprecated   string `json:"deprecated,omitempty"`
-	Usage        string `json:"usage"`
 	DefaultValue string `json:"default_value,omitempty"`
 	Type         string `json:"type,omitempty"`
 }

26-37: Unused SubCommands field in DocCommand struct.

The SubCommands field is defined but never populated in the code. The current implementation writes each command as a separate JSON object rather than building a nested structure. Consider removing this field if not needed, or document why it's reserved for future use.

If not needed, remove the unused field:

 type DocCommand struct {
 	Name        string   `json:"name"`
 	Usage       string   `json:"usage"`
 	Description string   `json:"description"`
 	Deprecated  string   `json:"deprecated,omitempty"`
 	Aliases     []string `json:"aliases,omitempty"`

 	Flags       []Flag `json:"flags,omitempty"`
 	GlobalFlags []Flag `json:"global_flags,omitempty"`
-
-	SubCommands []DocCommand `json:"subcommands,omitempty"`
 }
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 7b7cb45 and 20c8403.

⛔ Files ignored due to path filters (1)
  • tools/commandusage/inventory.json is excluded by !**/*.json
📒 Files selected for processing (1)
  • tools/commandusage/export.go (1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (1)
tools/commandusage/export.go (1)
cmd/root.go (1)
  • NewRootCommand (39-92)
🪛 GitHub Actions: Default
tools/commandusage/export.go

[error] 120-120: gosec: Expect WriteFile permissions to be 0600 or less (G306) - os.WriteFile called with 0644 permissions

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
  • GitHub Check: Cursor Bugbot
🔇 Additional comments (2)
tools/commandusage/export.go (2)

1-11: LGTM!

The package declaration and imports are clean and appropriate for this command-line tool.


39-57: LGTM!

The function correctly converts pflag.FlagSet to Flag structs, properly handles hidden flags, and extracts all relevant metadata.

Comment on lines 115 to 131
//go:generate rm -rf docs
//go:generate go run ./
func main() {
_, err := os.Stat(file)
if os.IsNotExist(err) {
if err := os.WriteFile(file, []byte("[]"), 0644); err != nil {
panic(err)
}
} else {
os.Remove(file)
}

file, err := os.OpenFile(file, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
panic(err)
}
defer file.Close()

visitSubCommands(cmd.NewRootCommand(), file)
}
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🛠️ Refactor suggestion

Address variable shadowing and JSON format issues.

Multiple issues in the main function:

  1. Variable name shadowing between global file string and local file *os.File
  2. The JSON output will be invalid (starts with "[]" then appends raw JSON objects)
  3. File handling logic is unnecessarily complex

Consider this approach:

 func main() {
-	_, err := os.Stat(file)
-	if os.IsNotExist(err) {
-		if err := os.WriteFile(file, []byte("[]"), 0600); err != nil {
-			panic(err)
-		}
-	} else {
-		os.Remove(file)
-	}
-
-	file, err := os.OpenFile(file, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
-	if err != nil {
+	outputFile, err := os.OpenFile(file, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0600)
+	if err != nil {
 		panic(err)
 	}
-	defer file.Close()
+	defer outputFile.Close()
 
-	visitSubCommands(cmd.NewRootCommand(), file)
+	// Write opening bracket for JSON array
+	outputFile.WriteString("[\n")
+	visitSubCommands(cmd.NewRootCommand(), outputFile)
+	// Write closing bracket
+	outputFile.WriteString("\n]")
 }

You'll also need to modify writeDocs to handle proper JSON array formatting with commas.

Committable suggestion skipped: line range outside the PR's diff.

🧰 Tools
🪛 GitHub Actions: Default

[error] 120-120: gosec: Expect WriteFile permissions to be 0600 or less (G306) - os.WriteFile called with 0644 permissions

🤖 Prompt for AI Agents
In tools/commandusage/export.go around lines 115 to 134, fix the variable
shadowing by renaming the local file handle variable to avoid clashing with the
global file string. Refactor the file handling logic to open the file once in
write mode, truncating it initially instead of writing "[]" and then appending.
Modify the JSON writing logic in writeDocs to correctly format the output as a
valid JSON array by writing the opening bracket once, then writing each JSON
object separated by commas, and finally writing the closing bracket, ensuring
the entire output is a well-formed JSON array.

@Dav-14 Dav-14 force-pushed the feat/export_fctl_command_as_json_ branch from 20c8403 to 3043815 Compare July 30, 2025 11:07
@Dav-14 Dav-14 force-pushed the feat/export_fctl_command_as_json_ branch from 3043815 to 3570ba6 Compare July 30, 2025 11:08
}

//go:generate rm -rf docs
//go:generate go run ./
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why run the binary on generate?

}

commands := visitSubCommands(cmd.NewRootCommand())
file, err := os.OpenFile(file, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
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Instead of remove the file with os.Remove then opening a new fil with os.OpenFile, you can use os.Create which truncates the file if it already exists.

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2 participants