fix: newline issues with --expose-deps

README.md

@@ -18,6 +18,10 @@ tags
 
 # You can add/ignore multiple commands at once:
 #bshchk:add-cmd curl wget
+
+# To ignore next line:
+#bshchk:ignore-next-line
+curl # won't be checked
 ```
 
 

finder.go

@@ -6,13 +6,22 @@ import (
 	"mvdan.cc/sh/v3/syntax"
 )
 
+var ignored_lines = []uint{}
+
 func get_ignored_and_deps(code string) ([]string, []string) {
 	// source: https://www.gnu.org/software/bash/manual/html_node/Bash-Builtins.html
 	var ignored []string = []string{"alias", "bind", "builtin", "caller", "command", "declare", "echo", "enable", "let", "local", "logout", "mapfile", "printf", "read", "readarray", "source", "type", "typeset", "ulimit", "unalias"}
 	var deps []string
 
-	for _, line := range strings.Split(code, "\n") {
+	for i, line := range strings.Split(code, "\n") {
 		splitted := strings.Split(line, " ")
+
+		// comments w/ no arguments
+		if splitted[0] == "#bshchk:ignore-next-line" {
+			ignored_lines = append(ignored_lines, uint(i)+1)
+		}
+
+		// comments with arguments
 		if len(splitted) < 2 {
 			continue
 		}
@@ -27,6 +36,15 @@ func get_ignored_and_deps(code string) ([]string, []string) {
 	return ignored, deps
 }
 
+func is_line_ignored(line uint) bool {
+	for _, ignored := range ignored_lines {
+		if line == ignored {
+			return true
+		}
+	}
+	return false
+}
+
 func find(code string) ([]string, error) {
 	r := strings.NewReader(code)
 	f, err := syntax.NewParser().Parse(r, "")
@@ -50,6 +68,9 @@ func find(code string) ([]string, error) {
 	syntax.Walk(f, func(node syntax.Node) bool {
 		switch x := node.(type) {
 		case *syntax.CallExpr:
+			if is_line_ignored(node.Pos().Line() - 1) {
+				return true
+			}
 			for i := range x.Args {
 				for _, part := range x.Args[i].Parts {
 					switch xx := part.(type) {

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
@@ -15,10 +16,18 @@ var args struct {
 	File          string `arg:"positional" help:"if not specified, will read from stdin" default:""`
 	Outfile       string `arg:"positional" help:"if not specified, will emit to stdout" default:""`
 	Version       bool   `arg:"-v" help:"print version and exit"`
-	YieldDepsOnly bool   `arg:"--yield-deps-only" help:"print dependencies as a JSON array and exit" default:false`
-	ExposeDeps    bool   `arg:"--expose-deps" help:"expose dependencies to program" default:false`
+	YieldDepsOnly bool   `arg:"--yield-deps-only" help:"print dependencies as a JSON array and exit" default:"false"`
+	ExposeDeps    bool   `arg:"--expose-deps" help:"expose dependencies to program" default:"false"`
 	DepsVarName   string `arg:"--deps-var-name" help:"override deps variable name" default:"deps"`
-	IgnoreShebang bool   `arg:"--ignore-shebang" help:"ignore shebang requirement" default:false`
+	IgnoreShebang bool   `arg:"--ignore-shebang" help:"ignore shebang requirement" default:"false"`
+}
+
+func emit(code string) {
+	if args.Outfile == "" {
+		fmt.Printf("%s", code)
+	} else {
+		os.WriteFile(args.Outfile, []byte(code), os.FileMode(0o755))
+	}
 }
 
 func main() {
@@ -55,6 +64,24 @@ func main() {
 		panic(err)
 	}
 
+	if args.YieldDepsOnly {
+		marshaled, err := json.Marshal(found)
+		if err != nil {
+			panic(err)
+		}
+		if string(marshaled) == "null" {
+			emit("[]")
+		} else {
+			emit(string(marshaled))
+		}
+		os.Exit(0)
+	}
+
+	if len(found) == 0 {
+		emit(code)
+		os.Exit(0)
+	}
+
 	codelines := strings.Split(code, "\n")
 
 	if len(codelines) < 2 {
@@ -70,10 +97,5 @@ func main() {
 	}
 
 	gen := shebang + "\n\n" + gencode(found) + "\n\n" + strings.Join(codelines[1:], "\n")
-
-	if args.Outfile == "" {
-		fmt.Printf("%s", gen)
-	} else {
-		os.WriteFile(args.Outfile, []byte(gen), os.FileMode(0o755))
-	}
+	emit(gen)
 }

rdc.sh

@@ -21,5 +21,5 @@ if (( ${#non_ok[@]} != 0 )); then
 fi
 
 unset non_ok{{if .UnsetDeps}}
-unset {{.DepsVar}}
-{{end}}# Dependencies are OK at this point
+unset {{.DepsVar}}{{end}}
+# Dependencies are OK at this point