compile_<demo>.bat never created the directory it compiles into

The windows-bat job failed on its first run, which is what it is for:

    javac: directory not found: build
    ##[error]compile_checksyntax.bat did not produce checksyntax.class

Every compile_<demo>.bat sets `targetdir=build` and passes it to `javac -d`
without creating it. JDK 8's javac requires the output directory to already
exist -- it will make package subdirectories underneath, but not the root. So
on a fresh clone none of these 39 scripts could compile anything. It went
unnoticed because a machine that had ever built the demos already had build\,
and because nothing ran them.

Reproduced exactly, under JDK 8, in a clean `git archive` export:

    $ javac -d build -cp ".:external_lib/*:lib/*" ...checksyntax.java
    javac: directory not found: build
    $ mkdir build && javac -d build ...
    $ echo $?
    0

Worth noting this cannot be reproduced on a current JDK: javac creates the
directory itself from some later release, so on JDK 21 the same command
succeeds. The scripts target a JDK 8 era toolchain, which is what CI runs.

All 39 now do:

    if not exist %targetdir% mkdir %targetdir%

The other two fixes from the previous commit did work: JAVA_HOME came through
from the runner (C:\hostedtoolcache\...\Java_Temurin-Hotspot_jdk\8.0.492-9)
rather than being overwritten by the hardcoded path, and feeding stdin from NUL
carried `pause` straight through ("Press any key to continue . . ." with no
hang).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012qPRpoD8exYRrUmbfXXWXj

Author: 2 people

src/main/java/gudusoft/gsqlparser/demos/analyzescript/compile_analyzescript.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\demos\*.java src\main\java\gudusoft\gsqlparser\demos\analyzescript\*.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/analyzesp/compile_analyzesp.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\analyzesp\Analyze_SP.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/analyzesp/sybase/compile_analyzesp.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\analyzesp\sybase\sybase\Analyze_SP.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/analyzeview/compile_analyzeview.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\analyzeview\Analyze_View.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/antiSQLInjection/columnImpact/compile_columnImpact.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\antiSQLInjection\columnImpact\*.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/antiSQLInjection/compile_antiSQLInjection.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\antiSQLInjection\*.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/benchmark/compile_benchmark.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\benchmark\benchmark.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/checksyntax/compile_checksyntax.bat

@@ -28,6 +28,9 @@ call setenv\setenv.bat
     )
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\checksyntax\checksyntax.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/columnAnalyze/compile_columnAnalyze.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\columnAnalyze\*.java src\main\java\gudusoft\gsqlparser\demos\columnAnalyze\*.java
 
 echo Completed.

src/main/java/gudusoft/gsqlparser/demos/columnDetail/compile_columnDetail.bat

@@ -32,6 +32,9 @@ call setenv\setenv.bat
 	)
 
 REM # Compile the gsp demo
+REM # javac -d needs the output directory to already exist.
+if not exist %targetdir% mkdir %targetdir%
+
 %JAVAC_CMD% -d %targetdir% -classpath %CLASSPATH% src\main\java\gudusoft\gsqlparser\demos\columnDetail\*.java
 
 echo Completed.