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-rw-r--r--lib/common/options_display.c493
1 files changed, 493 insertions, 0 deletions
diff --git a/lib/common/options_display.c b/lib/common/options_display.c
new file mode 100644
index 0000000..9798b31
--- /dev/null
+++ b/lib/common/options_display.c
@@ -0,0 +1,493 @@
+/*
+ * Copyright 2024 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU Lesser General Public License
+ * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
+ */
+
+#include <crm_internal.h>
+
+#include <glib.h> // GSList, GString
+
+#include "crmcommon_private.h"
+
+/*!
+ * \internal
+ * \brief Output an option's possible values
+ *
+ * \param[in,out] out Output object
+ * \param[in] option Option whose possible values to add
+ */
+static void
+add_possible_values_default(pcmk__output_t *out,
+ const pcmk__cluster_option_t *option)
+{
+ const char *id = _("Possible values");
+ GString *buf = g_string_sized_new(256);
+
+ CRM_ASSERT(option->type != NULL);
+
+ if (pcmk_is_set(option->flags, pcmk__opt_generated)) {
+ id = _("Possible values (generated by Pacemaker)");
+ }
+
+ if ((option->values != NULL) && (strcmp(option->type, "select") == 0)) {
+ const char *delim = ", ";
+ bool found_default = (option->default_value == NULL);
+ char *str = pcmk__str_copy(option->values);
+
+ for (const char *value = strtok(str, delim); value != NULL;
+ value = strtok(NULL, delim)) {
+
+ if (buf->len > 0) {
+ g_string_append(buf, delim);
+ }
+ g_string_append_c(buf, '"');
+ g_string_append(buf, value);
+ g_string_append_c(buf, '"');
+
+ if (!found_default && (strcmp(value, option->default_value) == 0)) {
+ found_default = true;
+ g_string_append(buf, _(" (default)"));
+ }
+ }
+ free(str);
+
+ } else if (option->default_value != NULL) {
+ pcmk__g_strcat(buf,
+ option->type, _(" (default: \""), option->default_value,
+ "\")", NULL);
+
+ } else {
+ pcmk__g_strcat(buf, option->type, _(" (no default)"), NULL);
+ }
+
+ out->list_item(out, id, "%s", buf->str);
+ g_string_free(buf, TRUE);
+}
+
+/*!
+ * \internal
+ * \brief Output a single option's metadata
+ *
+ * \param[in,out] out Output object
+ * \param[in] option Option to add
+ */
+static void
+add_option_metadata_default(pcmk__output_t *out,
+ const pcmk__cluster_option_t *option)
+{
+ const char *desc_short = option->description_short;
+ const char *desc_long = option->description_long;
+
+ CRM_ASSERT((desc_short != NULL) || (desc_long != NULL));
+
+ if (desc_short == NULL) {
+ desc_short = desc_long;
+ desc_long = NULL;
+ }
+
+ out->list_item(out, option->name, "%s", _(desc_short));
+
+ out->begin_list(out, NULL, NULL, NULL);
+
+ if (desc_long != NULL) {
+ out->list_item(out, NULL, "%s", _(desc_long));
+ }
+ add_possible_values_default(out, option);
+ out->end_list(out);
+}
+
+/*!
+ * \internal
+ * \brief Output the metadata for a list of options
+ *
+ * \param[in,out] out Output object
+ * \param[in] args Message-specific arguments
+ *
+ * \return Standard Pacemaker return code
+ *
+ * \note \p args should contain the following:
+ * -# Fake resource agent name for the option list (ignored)
+ * -# Short description of option list
+ * -# Long description of option list
+ * -# Filter: Group of <tt>enum pcmk__opt_flags</tt>; output an option
+ * only if its \c flags member has all these flags set
+ * -# <tt>NULL</tt>-terminated list of options whose metadata to format
+ * -# All: If \c true, output all options; otherwise, exclude advanced and
+ * deprecated options unless \c pcmk__opt_advanced and
+ * \c pcmk__opt_deprecated flags (respectively) are set in the filter.
+ */
+PCMK__OUTPUT_ARGS("option-list", "const char *", "const char *", "const char *",
+ "uint32_t", "const pcmk__cluster_option_t *", "bool")
+static int
+option_list_default(pcmk__output_t *out, va_list args)
+{
+ const char *name G_GNUC_UNUSED = va_arg(args, const char *);
+ const char *desc_short = va_arg(args, const char *);
+ const char *desc_long = va_arg(args, const char *);
+ const uint32_t filter = va_arg(args, uint32_t);
+ const pcmk__cluster_option_t *option_list =
+ va_arg(args, pcmk__cluster_option_t *);
+ const bool all = (bool) va_arg(args, int);
+
+ const bool show_deprecated = all
+ || pcmk_is_set(filter, pcmk__opt_deprecated);
+ const bool show_advanced = all || pcmk_is_set(filter, pcmk__opt_advanced);
+ bool old_fancy = false;
+
+ GSList *deprecated = NULL;
+ GSList *advanced = NULL;
+
+ CRM_ASSERT((out != NULL) && (desc_short != NULL) && (desc_long != NULL)
+ && (option_list != NULL));
+
+ old_fancy = pcmk__output_text_get_fancy(out);
+ pcmk__output_text_set_fancy(out, true);
+
+ out->info(out, "%s", _(desc_short));
+ out->spacer(out);
+ out->info(out, "%s", _(desc_long));
+ out->begin_list(out, NULL, NULL, NULL);
+
+ for (const pcmk__cluster_option_t *option = option_list;
+ option->name != NULL; option++) {
+
+ // Store deprecated and advanced options to display later if appropriate
+ if (pcmk_all_flags_set(option->flags, filter)) {
+ if (pcmk_is_set(option->flags, pcmk__opt_deprecated)) {
+ if (show_deprecated) {
+ deprecated = g_slist_prepend(deprecated, (gpointer) option);
+ }
+
+ } else if (pcmk_is_set(option->flags, pcmk__opt_advanced)) {
+ if (show_advanced) {
+ advanced = g_slist_prepend(advanced, (gpointer) option);
+ }
+
+ } else {
+ out->spacer(out);
+ add_option_metadata_default(out, option);
+ }
+ }
+ }
+
+ if (advanced != NULL) {
+ advanced = g_slist_reverse(advanced);
+
+ out->spacer(out);
+ out->begin_list(out, NULL, NULL, _("ADVANCED OPTIONS"));
+ for (const GSList *iter = advanced; iter != NULL; iter = iter->next) {
+ const pcmk__cluster_option_t *option = iter->data;
+
+ out->spacer(out);
+ add_option_metadata_default(out, option);
+ }
+ out->end_list(out);
+ g_slist_free(advanced);
+ }
+
+ if (deprecated != NULL) {
+ deprecated = g_slist_reverse(deprecated);
+
+ out->spacer(out);
+ out->begin_list(out, NULL, NULL,
+ _("DEPRECATED OPTIONS (will be removed in a future "
+ "release)"));
+ for (const GSList *iter = deprecated; iter != NULL; iter = iter->next) {
+ const pcmk__cluster_option_t *option = iter->data;
+
+ out->spacer(out);
+ add_option_metadata_default(out, option);
+ }
+ out->end_list(out);
+ g_slist_free(deprecated);
+ }
+
+ out->end_list(out);
+ pcmk__output_text_set_fancy(out, old_fancy);
+ return pcmk_rc_ok;
+}
+
+/*!
+ * \internal
+ * \brief Add a description element to an OCF-like metadata XML node
+ *
+ * Include a translation based on the current locale if \c ENABLE_NLS is
+ * defined.
+ *
+ * \param[in,out] out Output object
+ * \param[in] for_long If \c true, add long description; otherwise, add
+ * short description
+ * \param[in] desc Textual description to add
+ */
+static void
+add_desc_xml(pcmk__output_t *out, bool for_long, const char *desc)
+{
+ const char *tag = (for_long? PCMK_XE_LONGDESC : PCMK_XE_SHORTDESC);
+ xmlNode *node = pcmk__output_create_xml_text_node(out, tag, desc);
+
+ crm_xml_add(node, PCMK_XA_LANG, PCMK__VALUE_EN);
+
+#ifdef ENABLE_NLS
+ {
+ static const char *locale = NULL;
+
+ if (strcmp(desc, _(desc)) == 0) {
+ return;
+ }
+
+ if (locale == NULL) {
+ locale = strtok(setlocale(LC_ALL, NULL), "_");
+ }
+ node = pcmk__output_create_xml_text_node(out, tag, _(desc));
+ crm_xml_add(node, PCMK_XA_LANG, locale);
+ }
+#endif
+}
+
+/*!
+ * \internal
+ * \brief Output an option's possible values
+ *
+ * Add a \c PCMK_XE_OPTION element for each of the option's possible values.
+ *
+ * \param[in,out] out Output object
+ * \param[in] option Option whose possible values to add
+ */
+static void
+add_possible_values_xml(pcmk__output_t *out,
+ const pcmk__cluster_option_t *option)
+{
+ if ((option->values != NULL) && (strcmp(option->type, "select") == 0)) {
+ const char *delim = ", ";
+ char *str = pcmk__str_copy(option->values);
+ const char *ptr = strtok(str, delim);
+
+ while (ptr != NULL) {
+ pcmk__output_create_xml_node(out, PCMK_XE_OPTION,
+ PCMK_XA_VALUE, ptr,
+ NULL);
+ ptr = strtok(NULL, delim);
+ }
+ free(str);
+ }
+}
+
+/*!
+ * \internal
+ * \brief Map an option type to one suitable for daemon metadata
+ *
+ * \param[in] type Option type to map
+ *
+ * \return String suitable for daemon metadata to display as an option type
+ */
+static const char *
+map_legacy_option_type(const char *type)
+{
+ // @COMPAT Drop this function when we drop daemon metadata commands
+ if (pcmk__str_any_of(type, PCMK_VALUE_DURATION, PCMK_VALUE_TIMEOUT, NULL)) {
+ return PCMK__VALUE_TIME;
+
+ } else if (pcmk__str_any_of(type,
+ PCMK_VALUE_NONNEGATIVE_INTEGER,
+ PCMK_VALUE_SCORE, NULL)) {
+ return PCMK_VALUE_INTEGER;
+
+ } else if (pcmk__str_eq(type, PCMK_VALUE_VERSION, pcmk__str_none)) {
+ return PCMK_VALUE_STRING;
+
+ } else {
+ return type;
+ }
+}
+
+/*!
+ * \internal
+ * \brief Add a \c PCMK_XE_PARAMETER element to an OCF-like metadata XML node
+ *
+ * \param[in,out] out Output object
+ * \param[in] option Option to add as a \c PCMK_XE_PARAMETER element
+ */
+static void
+add_option_metadata_xml(pcmk__output_t *out,
+ const pcmk__cluster_option_t *option)
+{
+ const char *type = option->type;
+ const char *desc_long = option->description_long;
+ const char *desc_short = option->description_short;
+ const bool advanced = pcmk_is_set(option->flags, pcmk__opt_advanced);
+ const bool deprecated = pcmk_is_set(option->flags, pcmk__opt_deprecated);
+ const bool generated = pcmk_is_set(option->flags, pcmk__opt_generated);
+
+ // OCF requires "1"/"0" and does not allow "true"/"false
+ // @COMPAT Variables no longer needed after we drop legacy mode
+ const char *advanced_s = advanced? "1" : "0";
+ const char *generated_s = generated? "1" : "0";
+
+ // @COMPAT For daemon metadata only; drop when daemon metadata is dropped
+ const bool legacy = pcmk__output_get_legacy_xml(out);
+ char *desc_long_legacy = NULL;
+ GString *desc_short_legacy = NULL;
+
+ // The standard requires a parameter type
+ CRM_ASSERT(type != NULL);
+
+ // The standard requires long and short parameter descriptions
+ CRM_ASSERT((desc_long != NULL) || (desc_short != NULL));
+
+ if (desc_long == NULL) {
+ desc_long = desc_short;
+ } else if (desc_short == NULL) {
+ desc_short = desc_long;
+ }
+
+ if (legacy) {
+ // This is ugly but it will go away at a major release bump
+ type = map_legacy_option_type(type);
+
+ if (option->values != NULL) {
+ desc_long_legacy = crm_strdup_printf("%s Allowed values: %s",
+ desc_long, option->values);
+ desc_long = desc_long_legacy;
+ }
+
+ if (deprecated || advanced) {
+ const size_t init_sz = 1023;
+
+ if (desc_long != option->description_long) {
+ /* desc_long was NULL and got assigned desc_short, which was
+ * non-empty. Let desc_long have the "real" description, and put
+ * the flag in desc_short.
+ */
+ desc_short = "";
+ } else {
+ desc_short = pcmk__s(option->description_short, "");
+ }
+
+ if (deprecated) {
+ pcmk__add_separated_word(&desc_short_legacy, init_sz,
+ "*** Deprecated ***", NULL);
+ }
+ if (advanced) {
+ pcmk__add_separated_word(&desc_short_legacy, init_sz,
+ "*** Advanced Use Only ***", NULL);
+ }
+ pcmk__add_separated_word(&desc_short_legacy, 0, desc_short, NULL);
+
+ desc_short = desc_short_legacy->str;
+ }
+
+ /* These must be NULL when used as attribute values later.
+ * PCMK_XA_ADVANCED and PCMK_XA_GENERATED break validation for some
+ * legacy tools.
+ */
+ advanced_s = NULL;
+ generated_s = NULL;
+ }
+
+ pcmk__output_xml_create_parent(out, PCMK_XE_PARAMETER,
+ PCMK_XA_NAME, option->name,
+ PCMK_XA_ADVANCED, advanced_s,
+ PCMK_XA_GENERATED, generated_s,
+ NULL);
+
+ if (deprecated && !legacy) {
+ // No need yet to support "replaced-with" or "desc"; add if needed
+ pcmk__output_create_xml_node(out, PCMK_XE_DEPRECATED, NULL);
+ }
+ add_desc_xml(out, true, desc_long);
+ add_desc_xml(out, false, desc_short);
+
+ pcmk__output_xml_create_parent(out, PCMK_XE_CONTENT,
+ PCMK_XA_TYPE, type,
+ PCMK_XA_DEFAULT, option->default_value,
+ NULL);
+
+ add_possible_values_xml(out, option);
+
+ pcmk__output_xml_pop_parent(out);
+ pcmk__output_xml_pop_parent(out);
+
+ free(desc_long_legacy);
+ if (desc_short_legacy != NULL) {
+ g_string_free(desc_short_legacy, TRUE);
+ }
+}
+
+/*!
+ * \internal
+ * \brief Output the metadata for a list of options as OCF-like XML
+ *
+ * \param[in,out] out Output object
+ * \param[in] args Message-specific arguments
+ *
+ * \return Standard Pacemaker return code
+ *
+ * \note \p args should contain the following:
+ * -# Fake resource agent name for the option list
+ * -# Short description of option list
+ * -# Long description of option list
+ * -# Filter: Group of <tt>enum pcmk__opt_flags</tt>; output an option
+ * only if its \c flags member has all these flags set
+ * -# <tt>NULL</tt>-terminated list of options whose metadata to format
+ * -# Whether to output all options (ignored, treated as \c true)
+ */
+PCMK__OUTPUT_ARGS("option-list", "const char *", "const char *", "const char *",
+ "uint32_t", "const pcmk__cluster_option_t *", "bool")
+static int
+option_list_xml(pcmk__output_t *out, va_list args)
+{
+ const char *name = va_arg(args, const char *);
+ const char *desc_short = va_arg(args, const char *);
+ const char *desc_long = va_arg(args, const char *);
+ const uint32_t filter = va_arg(args, uint32_t);
+ const pcmk__cluster_option_t *option_list =
+ va_arg(args, pcmk__cluster_option_t *);
+
+ CRM_ASSERT((out != NULL) && (name != NULL) && (desc_short != NULL)
+ && (desc_long != NULL) && (option_list != NULL));
+
+ pcmk__output_xml_create_parent(out, PCMK_XE_RESOURCE_AGENT,
+ PCMK_XA_NAME, name,
+ PCMK_XA_VERSION, PACEMAKER_VERSION,
+ NULL);
+
+ pcmk__output_create_xml_text_node(out, PCMK_XE_VERSION, PCMK_OCF_VERSION);
+ add_desc_xml(out, true, desc_long);
+ add_desc_xml(out, false, desc_short);
+
+ pcmk__output_xml_create_parent(out, PCMK_XE_PARAMETERS, NULL);
+
+ for (const pcmk__cluster_option_t *option = option_list;
+ option->name != NULL; option++) {
+
+ if (pcmk_all_flags_set(option->flags, filter)) {
+ add_option_metadata_xml(out, option);
+ }
+ }
+
+ pcmk__output_xml_pop_parent(out);
+ pcmk__output_xml_pop_parent(out);
+ return pcmk_rc_ok;
+}
+
+static pcmk__message_entry_t fmt_functions[] = {
+ { "option-list", "default", option_list_default },
+ { "option-list", "xml", option_list_xml },
+
+ { NULL, NULL, NULL }
+};
+
+/*!
+ * \internal
+ * \brief Register the formatting functions for option lists
+ *
+ * \param[in,out] out Output object
+ */
+void
+pcmk__register_option_messages(pcmk__output_t *out) {
+ pcmk__register_messages(out, fmt_functions);
+}
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