Resolve versions in plugin manager

internal/manager/fetch.go

@@ -1,12 +1,14 @@
 package manager
 
 import (
+	"fmt"
 	"io/ioutil"
 	"net/http"
-	"os"
 	"path"
 
+	"github.com/blang/semver"
 	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/util"
 	git "gopkg.in/src-d/go-git.v4"
 )
 
@@ -56,11 +58,26 @@ func (i *PluginInfo) FetchRepo() error {
 }
 
 func (p *Plugin) ResolveVersion() error {
-	return nil
+	i := p.info
+	vs := i.Versions
+
+	for _, v := range vs {
+		microrange, err := semver.ParseRange(v.Require["micro"])
+		if err != nil {
+			return err
+		}
+		if microrange(util.SemVersion) {
+			p.version = v.Vers
+			fmt.Println("resolve version to ", v.Vstr)
+			return nil
+		}
+	}
+
+	return ErrRequireUnsat
 }
 
 func (p *Plugin) WriteVersion() error {
-	return ioutil.WriteFile(path.Join(p.dir, versionfile), []byte(p.version.String()), os.ModePerm)
+	return ioutil.WriteFile(path.Join(p.dir, versionfile), []byte(p.version.String()), 0644)
 }
 
 func (p *Plugin) FetchDeps() error {

internal/manager/manager_test.go

@@ -3,11 +3,15 @@ package manager
 import (
 	"testing"
 
+	"github.com/blang/semver"
 	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/util"
 )
 
 func init() {
 	config.InitConfigDir("./")
+	util.Version = "1.3.1"
+	util.SemVersion, _ = semver.Make(util.Version)
 }
 
 var sampleJson = []byte(`{
@@ -47,17 +51,17 @@ func TestParse(t *testing.T) {
 	}
 }
 
-// func TestFetch(t *testing.T) {
-// 	i, err := NewPluginInfoFromUrl("http://zbyedidia.webfactional.com/micro/test.json")
-// 	if err != nil {
-// 		t.Error(err)
-// 	}
-//
-// 	err = i.FetchRepo()
-// 	if err != nil {
-// 		t.Error(err)
-// 	}
-// }
+func TestFetch(t *testing.T) {
+	i, err := NewPluginInfoFromUrl("http://zbyedidia.webfactional.com/micro/test.json")
+	if err != nil {
+		t.Error(err)
+	}
+
+	err = i.FetchRepo()
+	if err != nil {
+		t.Error(err)
+	}
+}
 
 // func TestList(t *testing.T) {
 // 	is, err := ListInstalledPlugins()

internal/manager/plugin.go

@@ -20,6 +20,7 @@ var (
 	ErrMissingVersions = errors.New("Missing or empty versions field")
 	ErrMissingTag      = errors.New("Missing or empty tag field")
 	ErrMissingRequire  = errors.New("Missing or empty require field")
+	ErrRequireUnsat    = errors.New("Version require could not be satisfied")
 )
 
 const (
@@ -95,12 +96,12 @@ func (i *PluginInfo) makeVersions() error {
 		return ErrMissingVersions
 	}
 
-	for _, v := range i.Versions {
+	for j, v := range i.Versions {
 		sv, err := semver.Make(v.Vstr)
 		if err != nil {
 			return err
 		}
-		v.Vers = sv
+		i.Versions[j].Vers = sv
 		if len(v.Tag) == 0 {
 			return ErrMissingTag
 		} else if v.Require == nil {

internal/util/util.go

@@ -2,6 +2,7 @@ package util
 
 import (
 	"errors"
+	"fmt"
 	"os"
 	"os/user"
 	"path/filepath"
@@ -11,9 +12,33 @@ import (
 	"time"
 	"unicode/utf8"
 
+	"github.com/blang/semver"
 	runewidth "github.com/mattn/go-runewidth"
 )
 
+var (
+	// These variables should be set by the linker when compiling
+
+	// Version is the version number or commit hash
+	Version = "0.0.0-unknown"
+	// Semantic version
+	SemVersion semver.Version
+	// CommitHash is the commit this version was built on
+	CommitHash = "Unknown"
+	// CompileDate is the date this binary was compiled on
+	CompileDate = "Unknown"
+	// Debug logging
+	Debug = "ON"
+)
+
+func init() {
+	var err error
+	SemVersion, err = semver.Make(Version)
+	if err != nil {
+		fmt.Println("Invalid version: ", Version, err)
+	}
+}
+
 // SliceEnd returns a byte slice where the index is a rune index
 // Slices off the start of the slice
 func SliceEnd(slc []byte, index int) []byte {