Attempt to define a cattle herd unit

actions.ruleset

@@ -361,6 +361,12 @@ ui_name_plant = _("Transform by %sPlanting%s")
 ; /* TRANS: Pilla_ge (100% chance of success). */
 ui_name_pillage = _("Pilla%sge%s")
 
+; /* TRANS: _Graze the land (100% chance of success)*/
+ui_name_graze =_("%Graze%")
+
+; /* TRANS: _Spawn warrior (100% chance of success)*/
+ui_name_spawn = _("%Spawn%")
+
 ; /* TRANS: Clean (100% chance of success). */
 ui_name_clean = _("%sClean%s")
 
@@ -1158,6 +1164,21 @@ actor_reqs    =
       "UnitClassFlag", "CanPillage",   "Local"
     }
 
+[actionenabler_graze]
+action        = "Graze"
+actor_reqs    =
+    { "type",          "name",         "range"
+      "UnitClassFlag", "CanGraze",   "Local"
+    }
+
+[actionenabler_spawn_warrior]
+action        = "Spawn warrior"
+actor_reqs    =
+    { "type",          "name",         "range"
+      "UnitClassFlag", "CanSpawnWarrior",   "Local"
+    }
+
+
 [actionenabler_clean]
 action        = "Clean"
 actor_reqs    =

terrain.ruleset

@@ -623,15 +623,15 @@ warmer_wetter_result = "Swamp"
 warmer_drier_result  = "Swamp"
 cooler_wetter_result = "Swamp"
 cooler_drier_result  = "Tundra"
-native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter"
-flags                = "Starter", "CanHaveRiver"
+native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter", "Herd"
+flags                = "Starter", "CanHaveRiver", "Grazeable"
 property_green       = 50
 property_temperate   = 50
 color.r              = 11
 color.g              = 138
 color.b              = 4
 helptext             = _("\
-Grasslands afford exceptional agricultural opportunities.\
+Grasslands afford exceptional agricultural opportunities and can grow herds.\
 ")
 
 [terrain_hills]
@@ -674,7 +674,7 @@ warmer_wetter_result = "no"
 warmer_drier_result  = "no"
 cooler_wetter_result = "no"
 cooler_drier_result  = "no"
-native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter"
+native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter", "Herd"
 flags                = "Starter", "CanHaveRiver"
 property_green       = 50
 property_mountainous = 30
@@ -839,7 +839,7 @@ warmer_wetter_result = "Swamp"
 warmer_drier_result  = "Desert"
 cooler_wetter_result = "Desert"
 cooler_drier_result  = "Desert"
-native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter"
+native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter", "Herd"
 flags                = "Starter", "CanHaveRiver"
 property_green       = 50
 property_temperate   = 50
@@ -946,7 +946,7 @@ warmer_wetter_result = "Swamp"
 warmer_drier_result  = "Swamp"
 cooler_wetter_result = "Glacier"
 cooler_drier_result  = "Desert"
-native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter"
+native_to            = "Land", "Small Land", "Merchant", "Big Land", "Air", "Missile", "Helicopter", "Herd"
 flags                = "NoBarbs", "CanHaveRiver"
 property_cold        = 50
 color.r              = 188
@@ -1247,6 +1247,7 @@ ui_name_base_airbase = _("?gui_type:Build Airstrip/Airbase")
 ;                           by the 1 + sum of bonuses from the extras on the
 ;                           "Natural" layer.
 ;   - "NoStackDeath"      = Units inside do not die all at once when attacked
+;   - "Grazeable"         = Herd units can graze and reproduce on this tile
 ; helptext                = optional help text string; should escape all raw
 ;                           newlines so that xgettext parsing works
 ;
@@ -1256,7 +1257,7 @@ ui_name_base_airbase = _("?gui_type:Build Airstrip/Airbase")
 name           = _("Irrigation")
 category       = "Infra"
 causes         = "Irrigation"
-rmcauses       = "Pillage"
+rmcauses       = "Pillage", "Graze"
 graphic        = "tx.irrigation"
 graphic_alt    = "-"
 activity_gfx   = "unit.irrigation"
@@ -1480,7 +1481,7 @@ by other aircraft will cause the villagers to take fright and disband.\
 name           = _("Farmland")
 category       = "Infra"
 causes         = "Irrigation"
-rmcauses       = "Pillage"
+rmcauses       = "Pillage", "Graze"
 graphic        = "tx.farmland"
 graphic_alt    = "-"
 activity_gfx   = "unit.farmland"

units.ruleset

@@ -59,6 +59,8 @@ class_flags =
     _("AttFromNonNative"), _("Can launch attack from non-native tiles.")
     _("Missile")
     _("CanPillage")
+    _("CanGraze"), _("Can graze the land to reproduce.")
+    _("CanSpawnWarrior"), _("Can spawn a warrior at the cost of some health.")
     _("CanFortify"),
     ; /* xgettext:no-c-format */
                      _("Gets a 50% defensive bonus while in cities.")
@@ -164,6 +166,13 @@ flags         = "TerrainSpeed", "DamageSlows", "CanOccupyCity", "BuildAnywhere",
                 "TerrainDefense", "Airliftable", "NonNatBombardTgt",
                 "Barracks", "Ground"
 
+[unitclass_herd]
+; /* TRANS: Unit class: used adjectivally */
+name          =_("?unitclass:Herd")
+min_speed     = 1
+hp_loss_pct   = 0
+flags         = "CanGraze", "CanSpawnWarrior", "Ground"
+
 [unitclass_land_small]
 ; /* TRANS: Unit class: used adjectivally */
 name          = _("?unitclass:Small Land")
@@ -662,6 +671,39 @@ sufficient existing land). See the Terrain Alterations section \
 for more details.\
 ")
 
+[unit_cattle_herd]
+name          = _("Cattle herd")
+class         = "Herd"
+;reqs
+obsolete_by   = "None"
+graphic       = "u.cattle_herd"
+graphic_alt   = "-"
+sound_move    = "m_cattle_herd"
+sound_move_alt = "m_generic"
+sound_fight   = "f_generic"
+sound_fight_alt = "f_generic"
+build_cost    = 10
+pop_cost      = 1
+attack        = 0
+defense       = 1
+hitpoints     = 50
+firepower     = 0
+move_rate     = 1
+vision_radius_sq = 2
+transport_cap = 0
+fuel          = 2 ; Fuel is actually grass
+uk_happy      = 1
+uk_shield     = 1
+uk_food       = 1
+uk_gold       = 1
+tp_defense    = "Blocked"
+flags         = "Herd"
+roles         = ""
+helptext      = _("\
+A herd of cattle, the cornerstone of nomadic empires.\
+")
+
+
 [unit_warriors]
 name          = _("Warriors")
 class         = "Land"