Check if all specified paths are directories

Summary

The isdir macro checks whether all specified file paths are directories. It returns “true” only if all paths exist and are directories; otherwise, it returns “false”.

Syntax

${isdir;<path>[;<path>...]}

Parameters

• path - One or more file paths to check (can be absolute or relative)

Behavior

• Converts each path to an absolute path
• Checks if each path exists and is a directory
• Returns “true” only if ALL paths are directories
• Returns “false” if any path is not a directory or doesn’t exist
• Returns “false” if no paths are provided

Examples

Check a single directory:

${isdir;src/main/java}
# Returns: "true" if src/main/java is a directory

Check multiple directories:

${isdir;src;test;resources}
# Returns: "true" only if all three are directories

Use in conditional logic:

${if;${isdir;generated};directory-exists;directory-missing}

Conditional file processing:

${if;${isdir;${basedir}/config};${cat;config/settings.xml};default-config}

Validate project structure:

structure.valid=${isdir;src/main/java;src/main/resources;src/test/java}

Use Cases

• Validating that required directories exist
• Conditional logic based on directory presence
• Project structure validation
• Build prerequisite checking
• Directory existence verification
• Distinguishing between files and directories

Notes

• Returns “false” (not error) if paths don’t exist
• All paths must be directories for “true” result
• Returns string “true” or “false”, not boolean
• Paths are resolved to absolute paths before checking
• No distinction between non-existent and non-directory paths
• See also: ${isfile} for checking if paths are files
• Useful with ${if} macro for conditional behavior

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See test cases in MacroTestsForDocsExamples.java