Added support for jabba exec.

CHANGELOG.md

@@ -1,24 +1,29 @@
 # Changelog
-All notable changes to this project will be documented in this file.  
+All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.11.0](https://github.com/shyiko/jabba/compare/0.10.1...0.11.0) - 2018-05-07
+
+### Added
+- Support for `jabba exec JVM_VERSION -- command -with args` (#285)[https://github.com/shyiko/jabba/issues/285]
+
 ## [0.10.1](https://github.com/shyiko/jabba/compare/0.10.0...0.10.1) - 2018-05-07
 
 ### Fixed
-- `jabba install <semver>` not checking whether JDK is already installed. 
+- `jabba install <semver>` not checking whether JDK is already installed.
 
 ## [0.10.0](https://github.com/shyiko/jabba/compare/0.9.6...0.10.0) - 2018-05-06
 
-- [OpenJDK with Shenandoah GC](https://wiki.openjdk.java.net/display/shenandoah/Main) support ([#191](https://github.com/shyiko/jabba/issues/191))  
+- [OpenJDK with Shenandoah GC](https://wiki.openjdk.java.net/display/shenandoah/Main) support ([#191](https://github.com/shyiko/jabba/issues/191))
 (e.g. `jabba install [email protected]`).
-- Ability to install JDK from `tar.xz` archives  
+- Ability to install JDK from `tar.xz` archives
 (e.g. `jabba install [email protected]=tgx+file://$PWD/local-copy-of-openjdk-shenandoah-jdk9-b220-x86-release.tar.xz`).
 
 ## [0.9.6](https://github.com/shyiko/jabba/compare/0.9.5...0.9.6) - 2018-05-05
 
 ### Fixed
-- Sporadic "open: permission denied" when installing from tgz/zip's ([#190](https://github.com/shyiko/jabba/issues/190)).  
-Fix applied in 0.9.5 proved to be incomplete. 
+- Sporadic "open: permission denied" when installing from tgz/zip's ([#190](https://github.com/shyiko/jabba/issues/190)).
+Fix applied in 0.9.5 proved to be incomplete.
 
 ## [0.9.5](https://github.com/shyiko/jabba/compare/0.9.4...0.9.5) - 2018-05-04
 
@@ -35,17 +40,17 @@ Fix applied in 0.9.5 proved to be incomplete.
 ### Fixed
 - `Contents/Home` handling (macOS) ([#187](https://github.com/shyiko/jabba/issues/187)).
 
-## [0.9.2](https://github.com/shyiko/jabba/compare/0.9.1...0.9.2) - 2017-11-18 
+## [0.9.2](https://github.com/shyiko/jabba/compare/0.9.1...0.9.2) - 2017-11-18
 
 ### Fixed
 - `zip` & `tgz` stripping on Windows ([#116](https://github.com/shyiko/jabba/issues/116)).
 
-## [0.9.1](https://github.com/shyiko/jabba/compare/0.9.0...0.9.1) - 2017-10-12 
+## [0.9.1](https://github.com/shyiko/jabba/compare/0.9.0...0.9.1) - 2017-10-12
 
 ### Fixed
-- `tgz is not supported` when trying to install JDK from `tar.gz` on macOS & Windows. 
+- `tgz is not supported` when trying to install JDK from `tar.gz` on macOS & Windows.
 
-## [0.9.0](https://github.com/shyiko/jabba/compare/0.8.0...0.9.0) - 2017-09-19 
+## [0.9.0](https://github.com/shyiko/jabba/compare/0.8.0...0.9.0) - 2017-09-19
 
 ### Added
 - Latest JDK / `default` alias (automatic) linking ([#6](https://github.com/shyiko/jabba/issues/6))
@@ -60,7 +65,7 @@ Fix applied in 0.9.5 proved to be incomplete.
     lrwxrwxrwx  1 shyiko shyiko   30 Sep 19  2017  default -> /home/shyiko/.jabba/jdk/1.8.144/
     ```
 
-## [0.8.0](https://github.com/shyiko/jabba/compare/0.7.0...0.8.0) - 2017-09-19 
+## [0.8.0](https://github.com/shyiko/jabba/compare/0.7.0...0.8.0) - 2017-09-19
 
 ### Added
 - [Adopt OpenJDK](https://adoptopenjdk.net/) support.
@@ -74,11 +79,11 @@ Fix applied in 0.9.5 proved to be incomplete.
     [email protected]
     ```
 
-- Ability to install JDK in a custom location (`jabba install -o /jdk/destination`)  
+- Ability to install JDK in a custom location (`jabba install -o /jdk/destination`)
 NOTE: any JDK installed in this way is considered to be unmanaged, i.e. not available to `jabba ls`, `jabba use`, etc. (unless `jabba link`ed).
 
 ### Changed
-- semver library to [masterminds/semver](https://github.com/Masterminds/semver)  
+- semver library to [masterminds/semver](https://github.com/Masterminds/semver)
 (previously used library proved unreliable when given certain input (e.g. `>=1.6`)).
 
 ## [0.7.0](https://github.com/shyiko/jabba/compare/0.6.1...0.7.0) - 2017-05-12
@@ -114,7 +119,7 @@ NOTE: any JDK installed in this way is considered to be unmanaged, i.e. not avai
 ## [0.5.0](https://github.com/shyiko/jabba/compare/0.4.0...0.5.0) - 2016-11-11
 
 ### Added
-* `.jabbarc` support. 
+* `.jabbarc` support.
 
 ## [0.4.0](https://github.com/shyiko/jabba/compare/0.3.3...0.4.0) - 2016-07-22
 
@@ -145,14 +150,14 @@ NOTE: any JDK installed in this way is considered to be unmanaged, i.e. not avai
 ### Added
 * Zulu OpenJDK support (e.g. `jabba install zulu@<version>`).
 * Ability to install JDK from `zip` archives (in addition to already implemented `dmg`/`tar.gz`/`bin`).
-* Support for custom registries (e.g. `JABBA_INDEX=https://github.com/shyiko/jabba/raw/master/index.json jabba install ...`). 
+* Support for custom registries (e.g. `JABBA_INDEX=https://github.com/shyiko/jabba/raw/master/index.json jabba install ...`).
 
 ### Fixed
 * `which <alias>`.
 
 ## [0.2.0](https://github.com/shyiko/jabba/compare/0.1.0...0.2.0) - 2016-03-24
 
-### Added 
-* `alias default`/`unalias default`, `which`, `deactivate` commands. 
+### Added
+* `alias default`/`unalias default`, `which`, `deactivate` commands.
 
 ## 0.1.0 - 2016-03-23

README.md

@@ -5,16 +5,16 @@
 Java Version Manager inspired by [nvm](https://github.com/creationix/nvm) (Node.js). Written in Go.
 
 The goal is to provide unified pain-free experience of **installing** (and **switching** between different versions of) JDK regardless of
-the OS (macOS, Linux x86/x86_64/ARMv7+, Windows x86_64). 
+the OS (macOS, Linux x86/x86_64/ARMv7+, Windows x86_64).
 
 `jabba install`
 - [Oracle JDK](http://www.oracle.com/technetwork/java/javase/archive-139210.html) (latest-version only)
-- [Oracle Server JRE](http://www.oracle.com/technetwork/java/javase/downloads/server-jre8-downloads-2133154.html) (latest-version only), 
-- [Adopt OpenJDK](https://adoptopenjdk.net/) <sup>(jabba >=0.8.0 is required)</sup> 
-  - Hotspot 
+- [Oracle Server JRE](http://www.oracle.com/technetwork/java/javase/downloads/server-jre8-downloads-2133154.html) (latest-version only),
+- [Adopt OpenJDK](https://adoptopenjdk.net/) <sup>(jabba >=0.8.0 is required)</sup>
+  - Hotspot
   - [Eclipse OpenJ9](https://www.eclipse.org/openj9/oj9_faq.html)
 - [Zulu OpenJDK](http://zulu.org/) <sup>(jabba >=0.3.0 is required)</sup>
-- [IBM SDK, Java Technology Edition](https://developer.ibm.com/javasdk/) <sup>(jabba >=0.6.0 is required)</sup> 
+- [IBM SDK, Java Technology Edition](https://developer.ibm.com/javasdk/) <sup>(jabba >=0.6.0 is required)</sup>
 - [GraalVM CE](https://www.graalvm.org/)
 - [OpenJDK](http://openjdk.java.net/)
 - [OpenJDK with Shenandoah GC](https://wiki.openjdk.java.net/display/shenandoah/Main) <sup>(jabba >=0.10.0 is required)</sup>
@@ -33,19 +33,19 @@ curl -sL https://github.com/shyiko/jabba/raw/master/install.sh | bash && . ~/.ja
 
 > (use the same command to upgrade)
 
-> In [fish](https://fishshell.com/) command looks a little bit different - 
-`curl -sL https://github.com/shyiko/jabba/raw/master/install.sh | bash; and . ~/.jabba/jabba.fish` 
+> In [fish](https://fishshell.com/) command looks a little bit different -
+`curl -sL https://github.com/shyiko/jabba/raw/master/install.sh | bash; and . ~/.jabba/jabba.fish`
 
 > If you don't have `curl` installed - replace `curl -sL` with `wget -qO-`.
 
 > If you are behind a proxy see -
-[curl](https://curl.haxx.se/docs/manpage.html#ENVIRONMENT) / 
-[wget](https://www.gnu.org/software/wget/manual/wget.html#Proxies) manpage. 
-Usually simple `http_proxy=http://proxy-server:port https_proxy=http://proxy-server:port curl -sL ...` is enough. 
+[curl](https://curl.haxx.se/docs/manpage.html#ENVIRONMENT) /
+[wget](https://www.gnu.org/software/wget/manual/wget.html#Proxies) manpage.
+Usually simple `http_proxy=http://proxy-server:port https_proxy=http://proxy-server:port curl -sL ...` is enough.
 
 #### Docker
 
-While you can use the same snippet as above, chances are you don't want jabba binary & shell 
+While you can use the same snippet as above, chances are you don't want jabba binary & shell
 integration script(s) to be included in the final Docker image, all you want is a JDK. Here is the `Dockerfile` showing how this can be done:
 
 ```dockerfile
@@ -92,14 +92,14 @@ jabba ls-remote "*@>=1.6.45 <1.9" --latest=minor
 # install Oracle JDK
 jabba install 1.8
 # install Oracle Server JRE
-jabba install [email protected]  
+jabba install [email protected]
 # install Adopt OpenJDK (Hotspot)
 jabba install [email protected]
 # install Adopt OpenJDK (Eclipse OpenJ9)
 jabba install [email protected]
 # install Zulu OpenJDK
 jabba install [email protected]
-jabba install zulu@~1.8.144 # same as "zulu@>=1.8.144 <1.9" 
+jabba install zulu@~1.8.144 # same as "zulu@>=1.8.144 <1.9"
 # install IBM SDK, Java Technology Edition
 jabba install [email protected]
 # install GraalVM CE
@@ -132,22 +132,26 @@ jabba use
 # set default java version on shell (since 0.2.0)
 # this version will automatically be "jabba use"d every time you open up a new terminal
 jabba alias default 1.8
+
+# execute a single command with specified JDK version
+# make sure to add the `--` separator between jabba and your command
+jabba exec [email protected] -- mvn clean assemble
 ```
 
-> `.jabbarc` has to be a valid YAML file. JDK version can be specified as `jdk: 1.8` or simply as `1.8` 
+> `.jabbarc` has to be a valid YAML file. JDK version can be specified as `jdk: 1.8` or simply as `1.8`
 (same as `~1.8`, `1.8.x` `">=1.8.0 <1.9.0"` (mind the quotes)).
 
-> jsyk: **jabba** keeps everything under `~/.jabba` (on Linux/Mac OS X) / `%USERPROFILE%/.jabba` (on Windows). If at any point of time you decide to uninstall **jabba** - just remove this directory. 
+> jsyk: **jabba** keeps everything under `~/.jabba` (on Linux/Mac OS X) / `%USERPROFILE%/.jabba` (on Windows). If at any point of time you decide to uninstall **jabba** - just remove this directory.
 
-For more information see `jabba --help`.  
+For more information see `jabba --help`.
 
 ## Development
 
 > PREREQUISITE: [go1.8](https://github.com/moovweb/gvm)
 
 ```sh
-git clone https://github.com/shyiko/jabba $GOPATH/src/github.com/shyiko/jabba 
-cd $GOPATH/src/github.com/shyiko/jabba 
+git clone https://github.com/shyiko/jabba $GOPATH/src/github.com/shyiko/jabba
+cd $GOPATH/src/github.com/shyiko/jabba
 make fetch
 
 go run jabba.go
@@ -156,20 +160,20 @@ go run jabba.go
 make test # or "test-coverage" if you want to get a coverage breakdown
 
 # to make a build
-make build # or "build-release" (latter is cross-compiling jabba to different OSs/ARCHs)   
+make build # or "build-release" (latter is cross-compiling jabba to different OSs/ARCHs)
 ```
 
 ## FAQ
 
 **Q**: What if I already have `java` installed?
 
-A: It's fine. You can switch between system JDK and `jabba`-provided one whenever you feel like it (`jabba use ...` / `jabba deactivate`). 
+A: It's fine. You can switch between system JDK and `jabba`-provided one whenever you feel like it (`jabba use ...` / `jabba deactivate`).
 They are not gonna conflict with each other.
 
 **Q**: How do I switch `java` globally?
 
-A: **jabba** doesn't have this functionality built-in because the exact way varies greatly between the operation systems and usually 
-involves elevated permissions. But. Here are the snippets that <u>should</u> work:    
+A: **jabba** doesn't have this functionality built-in because the exact way varies greatly between the operation systems and usually
+involves elevated permissions. But. Here are the snippets that <u>should</u> work:
 
 * Windows
 
@@ -210,5 +214,5 @@ By using this software you agree to
 - Apple's Software License Agreement in case of "Java for OS X"
 - [International License Agreement for Non-Warranted Programs](http://www14.software.ibm.com/cgi-bin/weblap/lap.pl?la_formnum=&li_formnum=L-PMAA-A3Z8P2&l=en) in case of IBM SDK, Java Technology Edition.
 
-This software is for educational purposes only.  
-Use it at your own risk. 
+This software is for educational purposes only.
+Use it at your own risk.

command/exec.go

@@ -0,0 +1,38 @@
+package command
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"syscall"
+
+	"github.com/shyiko/jabba/cfg"
+)
+
+func Exec(selector string, command string, commandArgs []string) error {
+	aliasValue := GetAlias(selector)
+	if aliasValue != "" {
+		selector = aliasValue
+	}
+	ver, err := LsBestMatch(selector)
+	if err != nil {
+		return err
+	}
+
+	vars, err := GetVars(filepath.Join(cfg.Dir(), "jdk", ver))
+	if err != nil {
+		return err
+	}
+
+	for variableName, variableValue := range vars {
+		os.Setenv(variableName, variableValue)
+	}
+
+	binary, err := exec.LookPath(command)
+	if err != nil {
+		return err
+	}
+
+	err = syscall.Exec(binary, commandArgs, os.Environ())
+	return err
+}

command/use.go

@@ -1,11 +1,12 @@
 package command
 
 import (
-	"github.com/shyiko/jabba/cfg"
 	"os"
 	"path/filepath"
 	"regexp"
 	"runtime"
+
+	"github.com/shyiko/jabba/cfg"
 )
 
 func Use(selector string) ([]string, error) {
@@ -20,7 +21,7 @@ func Use(selector string) ([]string, error) {
 	return usePath(filepath.Join(cfg.Dir(), "jdk", ver))
 }
 
-func usePath(path string) ([]string, error) {
+func GetVars(path string) (map[string]string, error) {
 	path, err := filepath.Abs(path)
 	if err != nil {
 		return nil, err
@@ -36,9 +37,26 @@ func usePath(path string) ([]string, error) {
 	if !overrideWasSet {
 		systemJavaHome, _ = os.LookupEnv("JAVA_HOME")
 	}
-	return []string{
-		"export PATH=\"" + filepath.Join(path, "bin") + string(os.PathListSeparator) + pth + "\"",
-		"export JAVA_HOME=\"" + path + "\"",
-		"export JAVA_HOME_BEFORE_JABBA=\"" + systemJavaHome + "\"",
-	}, nil
+
+	paths := make(map[string]string)
+	paths["PATH"] = filepath.Join(path, "bin") + string(os.PathListSeparator) + pth
+	paths["JAVA_HOME"] = path
+	paths["JAVA_HOME_BEFORE_JABBA"] = systemJavaHome
+
+	return paths, nil
+}
+
+func usePath(path string) ([]string, error) {
+	vars, err := GetVars(path)
+	if err != nil {
+		return nil, err
+	}
+
+	paths := []string{}
+
+	for variableName, variableValue := range vars {
+		paths = append(paths, "export "+variableName+"=\""+variableValue+"\"")
+	}
+
+	return paths, nil
 }

jabba.go

@@ -329,6 +329,28 @@ func main() {
 			},
 		},
 		whichCmd,
+		&cobra.Command{
+			Use:   "exec [version] [--] [command] [args]",
+			Short: "Execute a command the specified JVM version",
+			RunE: func(cmd *cobra.Command, args []string) error {
+				if len(args) < 2 {
+					return pflag.ErrHelp
+				}
+
+				version := args[0]
+				executable := args[1]
+				commandArgs := args[1:]
+
+				err := command.Exec(version, executable, commandArgs)
+				if err != nil {
+					log.Fatal(err)
+				}
+				return nil
+			},
+			Example: "  jabba exec [email protected] ./gradlew clean assemble\n" +
+				"  jabba exec ~1.8.73 -- java -version # use -- separator if using args\n" +
+				"  jabba exec ~1.8.73 ./gradlew clean assemble # same as \">=1.8.73 <1.9.0\"",
+		},
 	)
 	rootCmd.Flags().Bool("version", false, "version of jabba")
 	rootCmd.PersistentFlags().String("fd3", "", "")