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Read OID–PureScript mappings from a configurable file in purspgpp

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Fixes #4.
This commit is contained in:
rightfold 2016-12-25 02:12:00 +01:00
parent 7d1f188bd7
commit 15a86ad15b
1 changed files with 31 additions and 21 deletions
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52
purspgpp
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@ -54,42 +54,52 @@ module libpq {
}
}
my Str:D %types{Int:D} =
16 => 'Boolean',
17 => 'ByteString',
18 => 'Char',
23 => 'Int',
25 => 'String',
701 => 'Number',
2950 => 'UUID',
2951 => 'List UUID',
;
constant DEFAULT-MAPPING = q:to/EOF/;
16 Boolean
17 ByteString
18 Char
23 Int
25 String
701 Number
2950 UUID
2951 List UUID
EOF
sub process-module(libpq::Connection $conn, Str:D $segment --> Str:D) {
S:g/'[query|' (.*?) '|]'/&process-query($conn, ~$0)/ given $segment;
sub process-module(libpq::Connection $conn, %mapping, Str:D $segment --> Str:D) {
S:g/'[query|' (.*?) '|]'/&process-query($conn, %mapping, ~$0)/ given $segment;
}
multi sub process-query(libpq::Connection:D $conn, Str:D $source --> Str:D) {
multi sub process-query(libpq::Connection:D $conn, %mapping, Str:D $source --> Str:D) {
$conn.prepare: '', $source;
my $description = $conn.describe-prepared('');
sub convert-types(@oids) {
die "unknown oid: $_" unless %types{$_}:exists for @oids;
(|@oids.map({%types{$_}}), "Unit").join(" × ");
die "unknown oid: $_" unless %mapping{$_}:exists for @oids;
(|@oids.map({%mapping{$_}}), "Unit").join(" × ");
};
my $parameters = convert-types($description.parameters);
my $fields = convert-types($description.fields);
"(Query \"\"\"$source\"\"\" :: Query ($parameters) ($fields))";
}
multi sub process-query(libpq::Connection:U, Str:D $source --> Str:D) {
multi sub process-query(libpq::Connection:U $conn, %mapping, Str:D $source --> Str:D) {
"(Query \"\"\"$source\"\"\")";
}
multi sub MAIN(Str $connection-string, IO(Cool) $in-file, IO(Cool) $out-file = '-', Bool :$syntax-only where !*) {
my $conn = libpq::Connection.new($connection-string);
$out-file.spurt: process-module($conn, $in-file.slurp);
sub main(libpq::Connection $conn, IO::Path:D $in-file, IO::Path:D $out-file, Bool:D $syntax-only, IO::Path $mapping-file) {
my %mapping{Int:D} =
(do with $mapping-file { .slurp } else { DEFAULT-MAPPING })
.lines
.map(*.trim.split(/\s+/, 2))
.grep(*.elems == 2)
.map({+$_[0] => $_[1]});
$out-file.spurt: process-module($conn, %mapping, $in-file.slurp);
}
multi sub MAIN(IO(Cool) $in-file, IO(Cool) $out-file = '-', Bool :$syntax-only where *) {
$out-file.spurt: process-module(libpq::Connection, $in-file.slurp);
multi sub MAIN(Str $connection-string, IO(Cool) $in-file, IO(Cool) $out-file = '-', Bool :$syntax-only where !*, IO(Cool) :$mapping-file) {
my $conn = libpq::Connection.new($connection-string);
main($conn, $in-file, $out-file, $syntax-only // False, $mapping-file);
}
multi sub MAIN(IO(Cool) $in-file, IO(Cool) $out-file = '-', Bool :$syntax-only where *, IO(Cool) :$mapping-file) {
main(libpq::Connection, $in-file, $out-file, $syntax-only // False, $mapping-file);
}