fix(cmake): use proper CMakePresets.json parsing

src/_cmake

@@ -172,6 +172,61 @@ _cmake_json_field() {
   fi
 }
 
+# ----------------------
+# _cmake_json_preset_block
+#
+# Slice out one preset object (by its "name") from a presets-array section
+# (the text following the "buildPresets"/"configurePresets" key). Returns the
+# object's text from its "name" entry up to the start of the next preset's
+# "name" entry.
+# ----------------------
+(( $+functions[_cmake_json_preset_block] )) ||
+_cmake_json_preset_block() {
+  local section="$1" name="$2"
+  local after="${section#*\"name\"[[:space:]]#:[[:space:]]#\"$name\"}"
+  [[ $after == "$section" ]] && return 1
+  print -r -- "${after%%\"name\"[[:space:]]#:*}"
+}
+
+# ----------------------
+# _cmake_json_inherited_field
+#
+# Look up $field on preset $name inside array-section $section, following
+# "inherits" (a string or an array of strings) when the preset itself
+# doesn't set the field, depth-first with first-match-wins -- matching
+# CMake's own resolution order. $4 is an internal "seen names" guard
+# against cyclic (invalid) inherits.
+# ----------------------
+(( $+functions[_cmake_json_inherited_field] )) ||
+_cmake_json_inherited_field() {
+  local section="$1" name="$2" field="$3" seen="$4"
+  [[ " $seen " == *" $name "* ]] && return 1
+
+  local block
+  block=$(_cmake_json_preset_block "$section" "$name") || return 1
+
+  local value
+  value=$(_cmake_json_field "$block" "$field")
+  if [[ -n $value ]]; then
+    print -r -- "$value"
+    return 0
+  fi
+
+  local parent
+  if [[ $block =~ '"inherits"[[:space:]]*:[[:space:]]*\[([^]]*)\]' ]]; then
+    for parent in ${(s:,:)match[1]}; do
+      parent=${parent//[\"[:space:]]/}
+      [[ -z $parent ]] && continue
+      value=$(_cmake_json_inherited_field "$section" "$parent" "$field" "$seen $name") && \
+        { print -r -- "$value"; return 0 }
+    done
+  elif [[ $block =~ '"inherits"[[:space:]]*:[[:space:]]*"([^"]*)"' ]]; then
+    _cmake_json_inherited_field "$section" "$match[1]" "$field" "$seen $name"
+    return
+  fi
+  return 1
+}
+
 # ----------------------
 # _cmake_json_preset_dir
 #
@@ -180,12 +235,9 @@ _cmake_json_field() {
 #   $2 = build preset name
 #
 # Steps:
-#   a) Slice out the build preset object (from its "name" entry up to the next "name" entry)
-#      and read its "configurePreset".
-#   b) Slice out that configure preset object the same way and read its "binaryDir".
-#   c) Expand the ${sourceDir} macro and strip a trailing slash.
-# Inheritance ("inherits") is not resolved; the caller's glob fallback covers
-# those uncommon setups.
+#   a) Find the build preset's "configurePreset" (following "inherits" if needed).
+#   b) Find that configure preset's "binaryDir" (following "inherits" if needed).
+#   c) Expand the ${sourceDir}/${presetName} macros and strip a trailing slash.
 # ----------------------
 (( $+functions[_cmake_json_preset_dir] )) ||
 _cmake_json_preset_dir() {
@@ -193,29 +245,23 @@ _cmake_json_preset_dir() {
   setopt extendedglob
   local json="$1" name="$2"
 
-  # --- a) locate the build preset object, read its configurePreset ---
-  # Everything from `"name": "<name>"` onward:
-  local after="${json#*\"name\"[[:space:]]#:[[:space:]]#\"$name\"}"
-  [[ $after == "$json" ]] && return    # name not found
-  # Trim at the start of the *next* preset object's name field, so we only
-  # look inside this preset.
-  local block="${after%%\"name\"[[:space:]]#:*}"
+  # Restrict the "name" search to the right array so a configurePreset and
+  # a buildPreset sharing the same name (a common CMakePresets pattern)
+  # don't get confused for one another.
+  local build_section="${json#*\"buildPresets\"}"
+  local configure_section="${json#*\"configurePresets\"}"
 
   local configPreset
-  configPreset=$(_cmake_json_field "$block" configurePreset)
+  configPreset=$(_cmake_json_inherited_field "$build_section" "$name" configurePreset)
   [[ -z $configPreset ]] && return
 
-  # --- b) locate that configure preset object, read its binaryDir ---
-  after="${json#*\"name\"[[:space:]]#:[[:space:]]#\"$configPreset\"}"
-  [[ $after == "$json" ]] && return
-  block="${after%%\"name\"[[:space:]]#:*}"
-
   local bd
-  bd=$(_cmake_json_field "$block" binaryDir)
+  bd=$(_cmake_json_inherited_field "$configure_section" "$configPreset" binaryDir)
   [[ -z $bd ]] && return
 
   # --- c) expand macros ---
   bd="${bd//\$\{sourceDir\}/$PWD}"
+  bd="${bd//\$\{presetName\}/$configPreset}"
   bd="${bd%/}"
   print -r -- "$bd"
 }