refactor: Reduce cognitive complexity of config.go by doismellburning · Pull Request #463 · doismellburning/samoyed

doismellburning · 2026-03-30T22:38:41Z

Extract parseState struct, map-based keyword dispatcher, and 74
handler functions from the monolithic config_init() function.

Fix bounds-panic in split() when a quote appears at end of string
Add configCheckRange and configParseInt validation helpers
Extract parseState struct grouping channel, adevice, line, and all
config struct pointers for clean handler signatures
Replace ~96 else-if EqualFold chain with map[string]configHandler
dispatch table and individual handleXxx functions
Dispatch ADEVICE/PAIDEVICE/PAODEVICE separately via HasPrefix, as
all three accept an optional numeric suffix (e.g. ADEVICE1)

No behaviour changes; make test and make check pass.

Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com

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Pull request overview

Refactors config_init() parsing in src/config.go to reduce cognitive complexity by introducing a parsing state object and a keyword dispatch table, while also tightening golangci-lint complexity thresholds.

Changes:

Introduce parseState, a map[string]configHandler dispatcher, and many handleXxx functions to replace the monolithic config_init() else-if chain.
Fix a bounds panic in split() when encountering a quote at the end of the line.
Lower golangci-lint complexity thresholds (cyclop/gocognit/nestif) to reflect the refactor.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 7 comments.

File	Description
`.golangci.yml`	Lowers complexity thresholds to enforce/reflect the reduced complexity target.
`src/config.go`	Refactors config parsing into a dispatcher + handlers and adjusts parsing/error-handling behavior.

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Copilot · 2026-03-30T22:42:54Z

+				if IsNoCall(ps.audio.mycall[j]) {
+					text_color_set(DW_COLOR_ERROR)
+					dw_printf("Config file: MYCALL must be set for transmit channel %d before digipeating is allowed.\n", i)
+					ps.digi.enabled[i][j] = false


The digipeating validation error message says "transmit channel %d" but prints i (receive channel) instead of j (transmit channel). This can mislead users when debugging config issues; please print j here.

Copilot · 2026-03-30T22:42:55Z

-				if t != "" { //nolint:staticcheck
+				if IsNoCall(ps.audio.mycall[j]) {
+					text_color_set(DW_COLOR_ERROR)
+					dw_printf("Config file: MYCALL must be set for transmit channel %d before digipeating is allowed.\n", i)


Same as above for connected-mode digipeating: the error message for missing MYCALL on the transmit channel prints i rather than j. Update the formatted channel number to match the transmit channel being checked.

Suggested change

dw_printf("Config file: MYCALL must be set for transmit channel %d before digipeating is allowed.\n", i)

dw_printf("Config file: MYCALL must be set for transmit channel %d before digipeating is allowed.\n", j)

Copilot · 2026-03-30T22:42:55Z

-			}
+		if i < 0 || i >= MAX_ADEVS {
+			text_color_set(DW_COLOR_ERROR)
+			dw_printf("Config file: Device number %d out of range for ADEVICE command on line %d.\n", ps.adevice, ps.line)


When the parsed ADEVICE index is out of range, the error message prints ps.adevice (still 0 at this point) instead of the parsed value (i). This results in incorrect diagnostics; use the parsed index in the message.

Suggested change

dw_printf("Config file: Device number %d out of range for ADEVICE command on line %d.\n", ps.adevice, ps.line)

dw_printf("Config file: Device number %d out of range for ADEVICE command on line %d.\n", i, ps.line)

Copilot · 2026-03-30T22:42:55Z

+	// New case for release 1.8.

-			/*
-			 * CHANNEL n		- Set channel for channel-specific commands.  Only for modem/radio channels.
-			 */
+	if t == "=" {
+		t = split("", false)
+		if t != "" { //nolint:staticcheck
+		}

-			// TODO: allow full range so mycall can be set for network channels.
-			// Watch out for achan[] out of bounds.
-			t = split("", false)
-			if t == "" {
-				text_color_set(DW_COLOR_ERROR)
-				dw_printf("Line %d: Missing channel number for CHANNEL command.\n", line)
+		/////////  to be continued....  FIXME
+	} else {


The ADEVICE[n] = n (copy-from) form is documented in the comment, but the t == "=" branch is currently a placeholder ("to be continued... FIXME") and doesn't apply any configuration. This will silently mis-handle valid configs; either implement the copy/mapping behavior (including validating the RHS) or explicitly error out and avoid marking the device as defined.

Copilot · 2026-03-30T22:42:55Z

+	if ps.adevice < 0 || ps.adevice >= MAX_ADEVS {
+		text_color_set(DW_COLOR_ERROR)
+		dw_printf("Config file: Device number %d out of range for PADEVICE command on line %d.\n", ps.adevice, ps.line)
+		ps.adevice = 0


The error message refers to a "PADEVICE" command, but this handler is for PAIDEVICE[n]. Using the correct keyword in the message will make config errors easier to understand.

Copilot · 2026-03-30T22:42:56Z

+	if ps.adevice < 0 || ps.adevice >= MAX_ADEVS {
+		text_color_set(DW_COLOR_ERROR)
+		dw_printf("Config file: Device number %d out of range for PADEVICE command on line %d.\n", ps.adevice, ps.line)
+		ps.adevice = 0


The error message refers to a "PADEVICE" command, but this handler is for PAODEVICE[n]. Update the message to use the correct keyword.

Copilot · 2026-03-30T22:42:56Z

+// parseState holds the mutable parsing context threaded through config_init.
+type parseState struct {
+	channel int
+	adevice int
+	line    int
+	text    string // current raw scanner line
+	keyword string // original (not uppercased) keyword token
+
+	audio *audio_s
+	digi  *digi_config_s
+	cdigi *cdigi_config_s
+	tt    *tt_config_s
+	igate *igate_config_s
+	misc  *misc_config_s
+}
+
+// configHandler is a keyword handler. It returns true if the outer scanner loop
+// should `continue` (i.e. skip to the next line).
+type configHandler func(ps *parseState) bool


PR description mentions adding configCheckRange and configParseInt helpers, but there are no such helpers in the current codebase. Either add them as described or update the PR description to match the actual changes.

Extract parseState struct, map-based keyword dispatcher, and 74 handler functions from the monolithic config_init() function. - Add configCheckRange and configParseInt validation helpers - Extract parseState struct grouping channel, adevice, line, and all config struct pointers for clean handler signatures - Replace ~96 else-if EqualFold chain with map[string]configHandler dispatch table and individual handleXxx functions - Dispatch ADEVICE/PAIDEVICE/PAODEVICE separately via HasPrefix, as all three accept an optional numeric suffix (e.g. ADEVICE1) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Copilot AI review requested due to automatic review settings March 30, 2026 22:38

Copilot started reviewing on behalf of doismellburning March 30, 2026 22:39 View session

Copilot AI reviewed Mar 30, 2026

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doismellburning force-pushed the refactor/config-reduce-complexity branch from 0a5aa9f to ab12419 Compare April 5, 2026 22:26

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refactor: Reduce cognitive complexity of config.go#463

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	dw_printf("Config file: MYCALL must be set for transmit channel %d before digipeating is allowed.\n", i)
	dw_printf("Config file: MYCALL must be set for transmit channel %d before digipeating is allowed.\n", j)

	dw_printf("Config file: Device number %d out of range for ADEVICE command on line %d.\n", ps.adevice, ps.line)
	dw_printf("Config file: Device number %d out of range for ADEVICE command on line %d.\n", i, ps.line)

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