(CommandList children: [ (Assignment keyword: Assign_None pairs: [ (assign_pair lhs: (LhsName name:USAGE) op: Equal rhs: { (SQ <'[--max-count=<n>] [<since>..<limit>] [--pretty=<format>] [git-rev-list options]'>) } spids: [13] ) ] spids: [13] ) (Assignment keyword: Assign_None pairs: [(assign_pair lhs:(LhsName name:SUBDIRECTORY_OK) op:Equal rhs:{(SQ <Yes>)} spids:[18])] spids: [18] ) (C {(.)} {(git-sh-setup)}) (AndOr ops: [Op_DPipe] children: [ (Assignment keyword: Assign_None pairs: [ (assign_pair lhs: (LhsName name:revs) op: Equal rhs: { (CommandSubPart command_list: (CommandList children: [ (C {(git-rev-parse)} {(--revs-only)} {(--no-flags)} {(--default)} {(HEAD)} {(DQ ($ VSub_At '$@'))} ) ] ) left_token: <Left_CommandSub '$('> spids: [29 43] ) } spids: [28] ) ] spids: [28] ) (ControlFlow token:<ControlFlow_Exit exit>) ] ) (AndOr ops: [Op_DPipe] children: [ (C {(Lit_Other '[')} {(DQ ($ VSub_Name '$revs'))} {(Lit_Other ']')}) (BraceGroup children:[(C {(die)} {(DQ ('No HEAD ref'))})] spids:[59]) ] ) (Pipeline children: [ (C {(git-rev-list)} {(--pretty)} { (CommandSubPart command_list: (CommandList children: [(C {(git-rev-parse)} {(--default)} {(HEAD)} {(DQ ($ VSub_At '$@'))})] ) left_token: <Left_CommandSub '$('> spids: [74 84] ) } ) (SimpleCommand words: [ { (BracedVarSub token: <VSub_Name PAGER> suffix_op: (StringUnary op_id:VTest_ColonHyphen arg_word:{(less)}) spids: [91 95] ) } ] more_env: [(env_pair name:LESS val:{(-S)} spids:[88])] ) ] negated: F ) ] )