Software Configuration Management Using Vesta

Transcription

1 Allan Heydon Roy Levin Timothy Mann Yuan Yu Software Configuration Management Using Vesta Springer

2 Contents Preface vii Part I Introducing Vesta 1 Introduction Some Scenarios The Connguration Management Challenge The Vesta Response 9 2 Essential Background The Unix File System Naming Files and Directories Mount Points Links Properties of Files Unix Processes The Unix Shell The Unix Programming Environment Make 20 3 The Architecture of Vesta System Components Source Management Components Build Components Storage Components Models and Modularity Vesta's Core Properties 29

3 xii Contents Part II The User's View ofvesta 4 Managing Sources and Versions Names and Versions The Source Name Space Versioning Naming Files and Packages The Development Cycle The Outer Loop The Inner Loop Detailed Operation of the Repository Tools Version Control Alternatives Additional Repository Tools Mutable Files and Directories Replication Global Name Space A Replication Example The Replicator Cross-Repository Check-out Repository Metadata Mutable Attributes Access Control Metadata and Replication 57 5 System Description Language Motivation Language Highlights The Environment Parameter Bindings Tool Encapsulation Closures Imports 68 6 Building Systems in Vesta The Organization of System Models Hierarchies of System Models Bridges and the Standard Environment Library Models Application Models Putting It All Together Control Panel Models Customizing the Build Process Handling Large Scale Software 88

4 Contents xiii Part III Inside Vesta 7 Inside the Repository Support for Evaluation and Caching Derived Files and Shortids Evaluator Directories and Volatile Directories Fingerprints Inside the Repository Implementation Directory Implementation Shortids and Files Longids Copy-on-Write NFS Interface RPC Interfaces Implementing Replication Mastership Agreement Agreement-Preserving Primitives Propagating Attributes Incremental Building Overview of Function Caching Caching and Dynamic Dependencies The Function Cache Interface Computing Fine-Grained Dependencies Representing Dependencies Caching External Tool Invocations Caching User-Defined Function Evaluations Caching System Model Evaluations: A Special Case Error Handling Function Cache Implementation Cache Lookup Cache Entry Storage Synchronization Evaluation and Caching in Action Scratch Build of the Standard Environment Scratch Build of the Vesta Umbrella Library Scratch and Incremental Builds of the Evaluator Weeder How Deletion is Specified Implementation of the Weeder The Function Call Graph Concurrent Weeding 152

5 xiv Contents Part IV Assessing Vesta 10 Competing Systems Loosely Connected Configuration Management Tools RCS CVS Make Integrated Configuration Management Systems DSEE ClearCASE Other Systems Vesta System Performance Platform Configuration Overall System Performance Performance Comparison with Make Performance Breakdown Caching Analysis Resource Usage Repository Performance Speed of File Operations Disk and Memory Consumption Speed of Repository Tools Speed of Cross-Repository Tools Speed of the Replicator Function Cache Performance Server Performance Measurements of the Stahle Cache Disk and Memory Usage Function Cache Scalability Weeder Performance Interprocess Communication Conclusions Vesta in the Real World Vesta in the Future 199 A SDL Reference Manual 203 A.l Introduction 203 A.2 Lexical Conventions 204 A.2.1 Meta-notation 204 A.2.2 Terminals 204 A.3 Semantics 205 A.3.1 Value Space 205

6 Contents xv A.3.2 Type Declarations 206 A.3.3 Evaluation Rules 207 A Expr 208 A Literal 209 A Id 209 A List 209 A Binding 212 A Select 213 A Block 214 A Stmt 215 A Assign 215 A Iterate 216 A FuncDef 216 A FuncCall 219 A Model 220 A Files 220 A Imports 224 A File Name Interpretation 227 A Pragmas 228 A.3.4 Primitives 228 A Functions on Type t_bool 229 A Functions on Type tjnt 229 A Functions on Type t_text 230 A Functions on Type tjist 232 A Functions on Type t.binding 234 A Special Purpose Functions 237 A Type Manipulation Functions 238 A Tool Invocation Function 239 A Diagnostic Functions 243 A.4 Concrete Syntax 244 A.4.1 Grammar 244 A.4.2 Ambiguity Resolution 247 A.4.3 Tokens 247 A.4.4 Reserved Identifiers 249 B The Vesta Web Site 251 References 253 Index 257