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added link to cluster info to acs-admin main page when cluster is enabled

Cleanup of external binaries: always use "util::which" to resolve binaries

Background: it is important to always use the same binaries of some

programs. This is important for security reasons, consistency, and

configurability (some operating systems have read-only file systems,

which might be on the path and should be avoided for some operations).

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improved spelling

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Added support for automatic disconnect when a dynamic cluster node is shut down

When the dynamic cluster configuration has scale for certain

occasions, it makes sense to provide down scaling support when these

occasions are over, which does not rely on the configured cluster

disconnect timeout (ClusterAutodeleteInterval). The new code will send

automatically a disconnect request when a dynamic cluster node is

terminating gracefully.

Depending on the configuration, a new version of NaviServer will be

necessary to reliably execute disconnect requests. Appropriate changes

are in the NaviServer release/4.99 and main branches.

- Bumped version numbers:

* acs-tcl to 5.10.1b4

* acs-admin to 5.10.1b4

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Adding auto-deletion of dynamic cluster nodes and small refactoring

- New kernel parameter "ClusterAutodeleteInterval" to specify, when a

dynamic cluster node is not regarded as temporarily unavailable but

as definitely gone. The default value for this parameter is 2m (2


- small refactoring to reduce duplicated logic

- Bumped version numbers:

* acs-kernel to 5.10.1b4

* acs-tcl to 5.10.1b3

* acs-admin to 5.10.1b3

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Small update for cluster support

- Improved visualization of cluster nodes that we lost contact to

- New kernel parameters to reduce hard-coded values and to make purpose more explicit

* new parameter ClusterHeartbeatInterval (default 20s),

was hardcoded before to the new default value

* renamed PreferredLocationRegexp -> ClusterPreferredLocationRegexp

* renamed EnableLoggingP -> ClusterEnableLoggingP

- Bumped version numbers:

* acs-kernel to 5.10.1b3

* acs-tcl to 5.10.1b2

* acs-admin to 5.10.1b2

acs-kernel acs-admin acs-tcl/

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Fix typos

Improve Git repository rebuild

- support tags: CVS tags are exported to the Git mirror and should have the precedence over branches when collecting available channels. Tags are now exported correctly from the Git repos.

- limit exported versions: we can now limit the versions that will be exported and also those that will only be exported via the "compat" channel. This works via a flag to the proc.

- hardcode openacs.org in the documentation link fo the exported repo, as the assumption is that the link will be served from the xowiki instance there

- include a download button, as per the openacs.org version in the extracted repo

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Fix typo

Provide a Git-based implementation of the logics to rebuild the package repository on OpenACS.org

apm_git_build_repository will rebuild either from scratch (clone) or via update (pull) the core repository and all of the non-core packages currently hosted on the GitHub mirror.

A different "channel" is created for every release branch detected in the core repository and for the main branch.

Possible improvements:

- automated detection of the non-core repos (may require scraping or api integration with the Git mirror)

- allow to federate a package repository, e.g. allow any OpenACS instance to act as package repository for others

The new proc is currently not used anywhere. The idea is to experiment with it on openacs.org and eventually use it to replace the CVS implementation.

Formatting changes

harden page contracts

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harden page contracts

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skip "-url" in "export_vars -url" since it is the default

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bumped version numbers to 5.10.1b1

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Disable tests to check for executables on the system

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Prefer OS-agnostic path separator, add cvs to the exec dependencies

Add further dependency to test

Test that external command line dependencies are executable

Prefer Naviserver API directly

Whitespace cleanup

Modernize api

Create the site_wide_subsite outside of the transaction in the test to avoid bootstraping issues on those instances that have not created one yet

improve page contract since passed-in values are used in a list filter

prevent break between icon and label

file cluster.adp was initially added on branch oacs-5-10.

file cluster.tcl was initially added on branch oacs-5-10.

cluster reform: added admin page and minor updates

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Replace api

prefer adp:icon over old-style actions in square braces