color based on semver constraints

go.mod

@@ -3,6 +3,7 @@ module github.com/jesseduffield/lazynpm
 go 1.14
 
 require (
+	github.com/Masterminds/semver v1.5.0
 	github.com/buger/jsonparser v0.0.0-20200322175846-f7e751efca13
 	github.com/cloudfoundry/jibber_jabber v0.0.0-20151120183258-bcc4c8345a21
 	github.com/creack/pty v1.1.10-0.20191209115840-8ab47f72e854
@@ -16,7 +17,7 @@ require (
 	github.com/integrii/flaggy v1.4.0
 	github.com/jesseduffield/gocui v0.3.1-0.20200405034337-066b5b6ca1ba
 	github.com/jesseduffield/termbox-go v0.0.0-20200405031649-4dc645f7e8ba // indirect
-	github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a
+	github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a // indirect
 	github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/mattn/go-colorable v0.1.4 // indirect

go.sum

@@ -2,6 +2,8 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/BurntSushi/toml v0.3.0/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
+github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 h1:uSoVVbwJiQipAclBbw+8quDsfcvFjOpI5iCf4p/cqCs=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=

pkg/gui/presentation/dependencies.go

@@ -1,6 +1,7 @@
 package presentation
 
 import (
+	"github.com/Masterminds/semver"
 	"github.com/fatih/color"
 	"github.com/jesseduffield/lazynpm/pkg/commands"
 	"github.com/jesseduffield/lazynpm/pkg/utils"
@@ -22,8 +23,30 @@ func getDepDisplayStrings(d *commands.Dependency) []string {
 	if d.Linked() {
 		localVersionCol = utils.ColoredString("linked: "+d.LinkPath, color.FgCyan)
 	} else if d.PackageConfig != nil {
-		localVersionCol = utils.ColoredString(d.PackageConfig.Version, color.FgYellow)
+		attr := color.FgYellow
+		if semverGood(d.PackageConfig.Version, d.Version) {
+			attr = color.FgGreen
+		}
+		localVersionCol = utils.ColoredString(d.PackageConfig.Version, attr)
+	} else {
+		localVersionCol = utils.ColoredString("missing", color.FgRed)
 	}
 
 	return []string{d.Name, utils.ColoredString(d.Version, color.FgMagenta), localVersionCol}
 }
+
+func semverGood(version, constraint string) bool {
+	c, err := semver.NewConstraint(constraint)
+	if err != nil {
+		return false
+	}
+
+	v, err := semver.NewVersion(version)
+	if err != nil {
+		return false
+	}
+
+	a := c.Check(v)
+
+	return a
+}