41e9e3e5ff
Loading `db/sqlite3' no longer raises an exception if the SQLite library isn't found. Instead, `sqlite3-connect' raises an exception, while `sqlite3-available?' reports whether it will work. The dynamic test allows the documentation-help system to continue to work if SQLite3 is not available. Currently, though, `raco setup' still insists on using SQLite3 to build the database of documented tags.
60 lines
2.3 KiB
Racket
60 lines
2.3 KiB
Racket
#lang racket/base
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(require racket/class
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ffi/file
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"../generic/place-client.rkt"
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"connection.rkt"
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"dbsystem.rkt"
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"ffi.rkt")
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(provide sqlite3-connect
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sqlite3-available?)
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(define (sqlite3-connect #:database path
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#:mode [mode 'read/write]
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#:busy-retry-delay [busy-retry-delay 0.1]
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#:busy-retry-limit [busy-retry-limit 10]
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#:debug? [debug? #f]
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#:use-place [use-place #f])
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(let ([path
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(case path
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((memory temporary) path)
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(else
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(let ([path (cleanse-path (path->complete-path path))])
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(security-guard-check-file 'sqlite3-connect
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path
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(case mode
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((read-only) '(read))
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(else '(read write))))
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path)))])
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(cond [use-place
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(place-connect (list 'sqlite3 path mode busy-retry-delay busy-retry-limit)
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sqlite-place-proxy%)]
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[else
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(let ([path-bytes
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(case path
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((memory) #":memory:")
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((temporary) #"")
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(else (path->bytes path)))])
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(let-values ([(db open-status)
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(sqlite3_open_v2 path-bytes
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(case mode
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((read-only) SQLITE_OPEN_READONLY)
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((read/write) SQLITE_OPEN_READWRITE)
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((create)
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(+ SQLITE_OPEN_READWRITE SQLITE_OPEN_CREATE))))])
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(handle-status* 'sqlite3-connect open-status db)
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(let ([c
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(new connection%
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(db db)
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(busy-retry-limit busy-retry-limit)
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(busy-retry-delay busy-retry-delay))])
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(when debug? (send c debug #t))
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c)))])))
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(define sqlite-place-proxy%
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(class place-proxy-connection%
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(super-new)
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(define/override (get-dbsystem) dbsystem)))
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(define (sqlite3-available?)
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(and sqlite-lib #t))
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