Adds -v/--values option; updates release script

README.mkd

@@ -46,10 +46,10 @@ If you're a Mac user you can also [install gron via brew](http://braumeister.org
 ▶ brew install gron
 ```
 
-Or if you're a Go user you can use `go get` (if you're using Go 1.7 or newer):
+Or if you're a Go user you can use `go install`:
 
 ```
-▶ go get -u github.com/tomnomnom/gron
+▶ go install github.com/tomnomnom/gron@latest
 ```
 
 It's recommended that you alias `ungron` or `norg` (or both!) to `gron --ungron`. Put something like this in your shell profile (e.g. in `~/.bashrc`):
@@ -217,6 +217,7 @@ Usage:
 
 Options:
   -u, --ungron     Reverse the operation (turn assignments back into JSON)
+  -v, --values     Print just the values of provided assignments
   -c, --colorize   Colorize output (default on tty)
   -m, --monochrome Monochrome (don't colorize output)
   -s, --stream     Treat each line of input as a separate JSON object

go.mod

@@ -1,9 +1,12 @@
 module github.com/tomnomnom/gron
 
+go 1.15
+
 require (
 	github.com/fatih/color v1.7.0
 	github.com/mattn/go-colorable v0.0.9
 	github.com/mattn/go-isatty v0.0.4 // indirect
 	github.com/nwidger/jsoncolor v0.0.0-20170215171346-75a6de4340e5
 	github.com/pkg/errors v0.8.0
+	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad // indirect
 )

go.sum

@@ -8,3 +8,5 @@ github.com/nwidger/jsoncolor v0.0.0-20170215171346-75a6de4340e5 h1:d+C3xJdxZT7wN
 github.com/nwidger/jsoncolor v0.0.0-20170215171346-75a6de4340e5/go.mod h1:GYFm0zZgTNeoK1QxuIofRDasy2ibmaJZhZLzwsMXUF4=
 github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+golang.org/x/sys v0.0.0-20220412211240-33da011f77ad h1:ntjMns5wyP/fN65tdBD4g8J5w8n015+iIIs9rtjXkY0=
+golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

main.go

@@ -57,6 +57,7 @@ func init() {
 
 		h += "Options:\n"
 		h += "  -u, --ungron     Reverse the operation (turn assignments back into JSON)\n"
+		h += "  -v, --values     Print just the values of provided assignments\n"
 		h += "  -c, --colorize   Colorize output (default on tty)\n"
 		h += "  -m, --monochrome Monochrome (don't colorize output)\n"
 		h += "  -s, --stream     Treat each line of input as a separate JSON object\n"
@@ -95,6 +96,7 @@ func main() {
 		versionFlag    bool
 		insecureFlag   bool
 		jsonFlag       bool
+		valuesFlag     bool
 	)
 
 	flag.BoolVar(&ungronFlag, "ungron", false, "")
@@ -111,6 +113,9 @@ func main() {
 	flag.BoolVar(&insecureFlag, "insecure", false, "")
 	flag.BoolVar(&jsonFlag, "j", false, "")
 	flag.BoolVar(&jsonFlag, "json", false, "")
+	flag.BoolVar(&valuesFlag, "values", false, "")
+	flag.BoolVar(&valuesFlag, "value", false, "")
+	flag.BoolVar(&valuesFlag, "v", false, "")
 
 	flag.Parse()
 
@@ -161,10 +166,12 @@ func main() {
 		opts = opts | optJSON
 	}
 
-	// Pick the appropriate action: gron, ungron or gronStream
+	// Pick the appropriate action: gron, ungron, gronValues, or gronStream
 	var a actionFn = gron
 	if ungronFlag {
 		a = ungron
+	} else if valuesFlag {
+		a = gronValues
 	} else if streamFlag {
 		a = gronStream
 	}
@@ -391,6 +398,48 @@ func ungron(r io.Reader, w io.Writer, opts int) (int, error) {
 	return exitOK, nil
 }
 
+// gronValues prints just the scalar values from some input gron statements
+// without any quotes or anything of that sort; a bit like jq -r
+// e.g. json[0].user.name = "Sam"; -> Sam
+func gronValues(r io.Reader, w io.Writer, opts int) (int, error) {
+	scanner := bufio.NewScanner(os.Stdin)
+
+	for scanner.Scan() {
+		s := statementFromString(scanner.Text())
+
+		// strip off the leading 'json' bare key
+		if s[0].typ == typBare && s[0].text == "json" {
+			s = s[1:]
+		}
+
+		// strip off the leading dots
+		if s[0].typ == typDot || s[0].typ == typLBrace {
+			s = s[1:]
+		}
+
+		for _, t := range s {
+			switch t.typ {
+			case typString:
+				var text string
+				err := json.Unmarshal([]byte(t.text), &text)
+				if err != nil {
+					// just swallow errors and try to continue
+					continue
+				}
+				fmt.Println(text)
+
+			case typNumber, typTrue, typFalse, typNull:
+				fmt.Println(t.text)
+
+			default:
+				// Nothing
+			}
+		}
+	}
+
+	return exitOK, nil
+}
+
 func colorizeJSON(src []byte) ([]byte, error) {
 	out := &bytes.Buffer{}
 	f := jsoncolor.NewFormatter()

script/release

@@ -26,24 +26,15 @@ if [ $? -ne 0 ]; then
     exit 3
 fi
 
-# Check if tag exists
-git fetch --tags
-git tag | grep "^${TAG}$"
-
-if [ $? -ne 0 ]; then
-    github-release release \
-        --user ${USER} \
-        --repo ${REPO} \
-        --tag ${TAG} \
-        --name "${REPO} ${TAG}" \
-        --description "${TAG}" \
-        --pre-release
-fi
-
+FILELIST=""
 
 for ARCH in "amd64" "386"; do
     for OS in "darwin" "linux" "windows" "freebsd"; do
 
+        if [[ "${OS}" == "darwin" && "${ARCH}" == "386" ]]; then
+            continue
+        fi
+
         BINFILE="${BINARY}"
 
         if [[ "${OS}" == "windows" ]]; then
@@ -52,22 +43,21 @@ for ARCH in "amd64" "386"; do
 
         rm -f ${BINFILE}
 
-        GOOS=${OS} GOARCH=${ARCH} go build -ldflags "-X main.gronVersion=${VERSION}" github.com/${USER}/${REPO}
+        GOOS=${OS} GOARCH=${ARCH} go build github.com/${USER}/${REPO}
 
         if [[ "${OS}" == "windows" ]]; then
             ARCHIVE="${BINARY}-${OS}-${ARCH}-${VERSION}.zip"
             zip ${ARCHIVE} ${BINFILE}
+            rm ${BINFILE}
         else
             ARCHIVE="${BINARY}-${OS}-${ARCH}-${VERSION}.tgz"
             tar --create --gzip --file=${ARCHIVE} ${BINFILE}
         fi
 
-        echo "Uploading ${ARCHIVE}..."
-        github-release upload \
-            --user ${USER} \
-            --repo ${REPO} \
-            --tag ${TAG} \
-            --name "${ARCHIVE}" \
-            --file ${PROJDIR}/${ARCHIVE}
+        FILELIST="${FILELIST} ${PROJDIR}/${ARCHIVE}"
     done
 done
+
+gh release create ${TAG} ${FILELIST}
+rm ${FILELIST}
+