Remove -s and add one-time alias

.github/workflows/CI.yaml

@@ -21,8 +21,6 @@ jobs:
         chmod +x swiftbox.sh
         ./swiftbox.sh -v
         ./swiftbox.sh --version
-        ./swiftbox.sh -v --short
-        ./swiftbox.sh --version -s
 
     - name: Test swiftbox help
       run: |
@@ -147,8 +145,6 @@ jobs:
         chmod +x swiftbox.sh
         ./swiftbox.sh -v
         ./swiftbox.sh --version
-        ./swiftbox.sh -v --short
-        ./swiftbox.sh --version -s
 
     - name: Test swiftbox help
       run: |
@@ -167,7 +163,15 @@ jobs:
       shell: bash
       run: swiftbox list
 
-    - name: Test swiftbox alias
+    - name: Test swiftbox short-term alias and check
+      env:
+        SWIFTBOX_SYSALIAS: 18.04
+      shell: bash
+      run: |
+        swiftbox check $MAINVER
+        swiftbox check nightly
+
+    - name: Test swiftbox long-term alias
       run: |
         swiftbox list
         sudo sh -c 'echo "20.04" > /opt/swiftbox/.system-alias'
@@ -275,8 +279,7 @@ jobs:
         chmod +x swiftbox.sh
         ./swiftbox.sh -v
         ./swiftbox.sh --version
-        ./swiftbox.sh -v --short
-        ./swiftbox.sh --version -s
+
 
     - name: Test swiftbox help
       run: |
@@ -394,8 +397,6 @@ jobs:
         chmod +x swiftbox.sh
         ./swiftbox.sh -v
         ./swiftbox.sh --version
-        ./swiftbox.sh -v --short
-        ./swiftbox.sh --version -s
 
     - name: Test swiftbox help
       run: |

.github/workflows/Tag.yaml

@@ -15,7 +15,7 @@ jobs:
       name: Test swiftbox
       run: |
         chmod +x swiftbox.sh
-        VERSION=`./swiftbox.sh -v -s`
+        VERSION=`./swiftbox.sh -v`
         echo "::set-env name=version::$VERSION"
         if [ $? = 0 ]
         then

README.md

@@ -72,13 +72,13 @@ You may notice a `[user]` or `[global]` prefix in the output, which indicates th
 
 ### Show `swiftbox` version
 
-Both `swiftbox` amd system (or alias) version will be shown with `-v` or `--version`. Add `-s` or `--short` to omit system version.
+`swiftbox` (and system alias) version will be shown with `-v` or `--version`. 
 
 ```console
 $ swiftbox --version
-0.12.3 (Ubuntu 20.04)
-$ swiftbox -v -s
 0.12.3
+$ swiftbox -v
+0.12.3 (Ubuntu 20.04)
 ```
 
 ### Check the availability of Swift versions
@@ -122,14 +122,14 @@ $ sudo swiftbox close
 
 ### List local toolchain versions
 
-The active one is marked with `*`. System versions will also be shown, and you can use `-s` or `--short` to omit. 
+The active one is marked with `*`. If the toolchain version does not match your system version, its platform version will also be shown. 
 
 ```console
 $ swiftbox list
-- 2020-05-10-a (Ubuntu 20.04)
+- 2020-05-10-a
 - 4.2.1 (Ubuntu 18.04)
-* 5.2.2 (Ubuntu 20.04)
-$ sudo swiftbox list -s
+* 5.2.2
+$ sudo swiftbox list
 - 2020-04-03-a
 - 4.3
 ```
@@ -184,11 +184,9 @@ Commands:
 
 ### Alias your system version in `swiftbox`
 
-Since Ubuntu has non-LTS versions and they may be (partially) compatible with toolchains built for LTS versions, `swiftbox` allows aliases (See #1) by specifying the version in `.system-alias` file in its working directory.
+Since Ubuntu has non-LTS versions and they may be (partially) compatible with toolchains built for LTS versions, `swiftbox` allows long-term aliases (See #1) by specifying the version in `.system-alias` file in its working directory.
 
 ```console
-$ swiftbox -v
-0.12.3 (Ubuntu 19.10)
 $ echo "20.04" > ~/.swiftbox/.system-alias
 $ swiftbox -v
 0.12.3 (Ubuntu 20.04)
@@ -197,6 +195,13 @@ Swift 5.2.4 is available for Ubuntu 20.04
 You can get it with: swiftbox get 5.2.4
 ```
 
+For one-time alias, use environmental variable `$SWIFTBOX_SYSALIAS` instead:
+
+```console
+$ export SWIFTBOX_SYSALIAS="20.04"
+$ swiftbox get 5.2.4
+```
+
 ## Known issues with upgrading
 
 ### Version < 0.11

install.sh

@@ -52,7 +52,7 @@ fi
 if hash swiftbox 2> /dev/null
 then
     UPGRADE_COMMAND="upgrade"
-    SWIFTBOX_VERSION=`swiftbox -v -s`
+    SWIFTBOX_VERSION=`swiftbox -v`
     if [ $? != 0 ]
     then
         UPGRADE_COMMAND="update"

swiftbox.sh

@@ -2,7 +2,7 @@
 
 ## Set environment properties
 
-SWIFTBOX_VERSION="0.12.3"
+SWIFTBOX_VERSION="0.12.4"
 
 if [ `id -u` = 0 ]
 then
@@ -25,7 +25,10 @@ if [ -f /etc/os-release ]
 then
     source /etc/os-release
     SYSTEM_NICENAME=$NAME
-    if [ -f $WORKING_DIR/.system-alias ]
+    if [ E$SWIFTBOX_SYSALIAS != E ]
+    then
+        SYSTEM_VERSION=$SWIFTBOX_SYSALIAS
+    elif [ -f $WORKING_DIR/.system-alias ]
     then
         SYSTEM_VERSION=`cat $WORKING_DIR/.system-alias`
     else
@@ -302,7 +305,7 @@ install-toolchain() {
     fi
     tar -xzf download/$FILE_NAME.tar.gz -C temp
     mv temp/$FILE_NAME toolchain/swift-$NEW_VERSION
-    echo $VERSION > $WORKING_DIR/toolchain/$file/.system-version
+    echo $SYSTEM_VERSION > $WORKING_DIR/toolchain/$file/.system-version
 }
 
 ## Manage local toolchains
@@ -460,16 +463,15 @@ list)
         then
             if [ ! -f $WORKING_DIR/toolchain/$file/.system-version ]
             then
-                echo $SYSTEM_VERSION > $WORKING_DIR/toolchain/$file/.system-version
+                echo $VERSION_ID > $WORKING_DIR/toolchain/$file/.system-version
             fi
             version=`cat $WORKING_DIR/toolchain/$file/.system-version`
-            case $2 in
-            -s | --short)
-            ;;
-            *)
+            if [ $version = $VERSION_ID ]
+            then
+                SUFFIX=""
+            else
                 SUFFIX=" ($SYSTEM_NICENAME $version)"
-            ;;
-            esac
+            fi
             if [ $file = swift-`default-version` ]
             then
                 echo "* ${file#swift\-}$SUFFIX"
@@ -525,14 +527,12 @@ upgrade)
     exit $CURL_RESULT
 ;;
 -v | --version)
-    case $2 in
-    -s | --short)
+    if [ $VERSION_ID = $SYSTEM_VERSION ]
+    then
         echo $SWIFTBOX_VERSION
-    ;;
-    *)
+    else
         echo "$SWIFTBOX_VERSION ($SYSTEM_NICENAME $SYSTEM_VERSION)"
-    ;;
-    esac
+    fi
 ;;
 -h | --help)
     cat <<EOF