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extension_control_path

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The new GUC extension_control_path specifies a path to look for
extension control files.  The default value is $system, which looks in
the compiled-in location, as before.

The path search uses the same code and works in the same way as
dynamic_library_path.

Some use cases of this are: (1) testing extensions during package
builds, (2) installing extensions outside security-restricted
containers like Python.app (on macOS), (3) adding extensions to
PostgreSQL running in a Kubernetes environment using operators such as
CloudNativePG without having to rebuild the base image for each new
extension.

There is also a tweak in Makefile.global so that it is possible to
install extensions using PGXS into an different directory than the
default, using 'make install prefix=/else/where'.  This previously
only worked when specifying the subdirectories, like 'make install
datadir=/else/where/share pkglibdir=/else/where/lib', for purely
implementation reasons.  (Of course, without the path feature,
installing elsewhere was rarely useful.)

Author: Peter Eisentraut <peter@eisentraut.org>
Co-authored-by: Matheus Alcantara <matheusssilv97@gmail.com>
Reviewed-by: David E. Wheeler <david@justatheory.com>
Reviewed-by: Gabriele Bartolini <gabriele.bartolini@enterprisedb.com>
Reviewed-by: Marco Nenciarini <marco.nenciarini@enterprisedb.com>
Reviewed-by: Niccolò Fei <niccolo.fei@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E7C7BFFB-8857-48D4-A71F-88B359FADCFD@justatheory.com
This commit is contained in:
Peter Eisentraut
2025-03-19 06:57:20 +01:00
parent 2cce0fe440
commit 4f7f7b0375
13 changed files with 526 additions and 199 deletions
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13
src/backend/utils/misc/guc_tables.c
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@ -39,6 +39,7 @@
#include "catalog/namespace.h"
#include "catalog/storage.h"
#include "commands/async.h"
#include "commands/extension.h"
#include "commands/event_trigger.h"
#include "commands/tablespace.h"
#include "commands/trigger.h"
@ -4364,6 +4365,18 @@ struct config_string ConfigureNamesString[] =
NULL, NULL, NULL
},
{
{"extension_control_path", PGC_SUSET, CLIENT_CONN_OTHER,
gettext_noop("Sets the path for extension control files."),
gettext_noop("The remaining extension script and secondary control files are then loaded "
"from the same directory where the primary control file was found."),
GUC_SUPERUSER_ONLY
},
&Extension_control_path,
"$system",
NULL, NULL, NULL
},
{
{"krb_server_keyfile", PGC_SIGHUP, CONN_AUTH_AUTH,
gettext_noop("Sets the location of the Kerberos server key file."),