modularized all source code (#4391)

* modularized all external plugins

* added README.md in plugins

* fixed title

* fixed typo

* relative link to external plugins

* external plugins configuration README

* added plugins link

* remove plugins link

* plugin names are links

* added links to external plugins

* removed unecessary spacing

* list to table

* added language

* fixed typo

* list to table on internal plugins

* added more documentation to internal plugins

* moved python, node, and bash code and configs into the external plugins

* added statsd README

* fix bug with corrupting config.h every 2nd compilation

* moved all config files together with their code

* more documentation

* diskspace info

* fixed broken links in apps.plugin

* added backends docs

* updated plugins readme

* move nc-backend.sh to backends

* created daemon directory

* moved all code outside src/

* fixed readme identation

* renamed plugins.d.plugin to plugins.d

* updated readme

* removed linux- from linux plugins

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* fixed README.md links

* fixed netdata tree links

* updated codacy, codeclimate and lgtm excluded paths

* update CMakeLists.txt

* updated automake options at top directory

* libnetdata slit into directories

* updated READMEs

* updated READMEs

* updated ARL docs

* updated ARL docs

* moved /plugins to /collectors

* moved all external plugins outside plugins.d

* updated codacy, codeclimate, lgtm

* updated README

* updated url

* updated readme

* updated readme

* updated readme

* updated readme

* moved api and web into webserver

* web/api web/gui web/server

* modularized webserver

* removed web/gui/version.txt

1 files changed, 76 insertions, 0 deletions

diff --git a/health/health.h b/health/health.h
new file mode 100644
index 0000000000..ff7a4d9bf1
--- /dev/null
+++ b/health/health.h
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_HEALTH_H
+#define NETDATA_HEALTH_H 1
+
+#include "../daemon/common.h"
+
+#define NETDATA_PLUGIN_HOOK_HEALTH \
+    { \
+        .name = "HEALTH", \
+        .config_section = NULL, \
+        .config_name = NULL, \
+        .enabled = 1, \
+        .thread = NULL, \
+        .init_routine = NULL, \
+        .start_routine = health_main \
+    },
+
+extern unsigned int default_health_enabled;
+
+#define HEALTH_ENTRY_FLAG_PROCESSED             0x00000001
+#define HEALTH_ENTRY_FLAG_UPDATED               0x00000002
+#define HEALTH_ENTRY_FLAG_EXEC_RUN              0x00000004
+#define HEALTH_ENTRY_FLAG_EXEC_FAILED           0x00000008
+#define HEALTH_ENTRY_FLAG_SAVED                 0x10000000
+#define HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION 0x80000000
+
+extern void health_init(void);
+extern void *health_main(void *ptr);
+
+extern void health_reload(void);
+
+extern int health_variable_lookup(const char *variable, uint32_t hash, RRDCALC *rc, calculated_number *result);
+extern void health_alarms2json(RRDHOST *host, BUFFER *wb, int all);
+extern void health_alarm_log2json(RRDHOST *host, BUFFER *wb, uint32_t after);
+
+void health_api_v1_chart_variables2json(RRDSET *st, BUFFER *buf);
+
+extern int health_alarm_log_open(RRDHOST *host);
+extern void health_alarm_log_close(RRDHOST *host);
+extern void health_log_rotate(RRDHOST *host);
+extern void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae);
+extern ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filename);
+extern void health_alarm_log_load(RRDHOST *host);
+
+extern void health_alarm_log(
+        RRDHOST *host,
+        uint32_t alarm_id,
+        uint32_t alarm_event_id,
+        time_t when,
+        const char *name,
+        const char *chart,
+        const char *family,
+        const char *exec,
+        const char *recipient,
+        time_t duration,
+        calculated_number old_value,
+        calculated_number new_value,
+        RRDCALC_STATUS old_status,
+        RRDCALC_STATUS new_status,
+        const char *source,
+        const char *units,
+        const char *info,
+        int delay,
+        uint32_t flags
+);
+
+extern void health_readdir(RRDHOST *host, const char *user_path, const char *stock_path, const char *subpath);
+extern char *health_user_config_dir(void);
+extern char *health_stock_config_dir(void);
+extern void health_reload_host(RRDHOST *host);
+extern void health_alarm_log_free(RRDHOST *host);
+
+extern void health_alarm_log_free_one_nochecks_nounlink(ALARM_ENTRY *ae);
+
+#endif //NETDATA_HEALTH_H