Move all lua related files to lua/ subfolder

Also remove the lexers sub directory from the Lua search path.
As a result we attempt to open fewer files during startup:

 $ strace -e open -o log ./vis +q config.h && wc -l log

In order to avoid having to modifiy all lexers which `require('lexer')`
we instead place a symlink in the top level directory.

 $ ./configure --disable-lua
 $ rm -rf lua

Should result in a source tree with most lua specifc functionality
removed.

1 files changed, 0 insertions, 132 deletions

diff --git a/lexers/glsl.lua b/lexers/glsl.lua
deleted file mode 100644
index 6d59da8..0000000
--- a/lexers/glsl.lua
+++ /dev/null
@@ -1,132 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- GLSL LPeg lexer.
-
-local l = require('lexer')
-local token, word_match = l.token, l.word_match
-local P, R, S = lpeg.P, lpeg.R, lpeg.S
-local table = _G.table
-
-local M = {_NAME = 'glsl'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'attribute', 'const', 'in', 'inout', 'out', 'uniform', 'varying', 'invariant',
-  'centroid', 'flat', 'smooth', 'noperspective', 'layout', 'patch', 'sample',
-  'subroutine', 'lowp', 'mediump', 'highp', 'precision',
-  -- Macros.
-  '__VERSION__', '__LINE__', '__FILE__',
-})
-
--- Functions.
-local func = token(l.FUNCTION, word_match{
-  'radians', 'degrees', 'sin', 'cos', 'tan', 'asin', 'acos', 'atan', 'sinh',
-  'cosh', 'tanh', 'asinh', 'acosh', 'atanh', 'pow', 'exp', 'log', 'exp2',
-  'log2', 'sqrt', 'inversesqrt', 'abs', 'sign', 'floor', 'trunc', 'round',
-  'roundEven', 'ceil', 'fract', 'mod', 'modf', 'min', 'max', 'clamp', 'mix',
-  'step', 'smoothstep', 'isnan', 'isinf', 'floatBitsToInt', 'floatBitsToUint',
-  'intBitsToFloat', 'uintBitsToFloat', 'fma', 'frexp', 'ldexp', 'packUnorm2x16',
-  'packUnorm4x8', 'packSnorm4x8', 'unpackUnorm2x16', 'unpackUnorm4x8',
-  'unpackSnorm4x8', 'packDouble2x32', 'unpackDouble2x32', 'length', 'distance',
-  'dot', 'cross', 'normalize', 'ftransform', 'faceforward', 'reflect',
-  'refract', 'matrixCompMult', 'outerProduct', 'transpose', 'determinant',
-  'inverse', 'lessThan', 'lessThanEqual', 'greaterThan', 'greaterThanEqual',
-  'equal', 'notEqual', 'any', 'all', 'not', 'uaddCarry', 'usubBorrow',
-  'umulExtended', 'imulExtended', 'bitfieldExtract', 'bitfildInsert',
-  'bitfieldReverse', 'bitCount', 'findLSB', 'findMSB', 'textureSize',
-  'textureQueryLOD', 'texture', 'textureProj', 'textureLod', 'textureOffset',
-  'texelFetch', 'texelFetchOffset', 'textureProjOffset', 'textureLodOffset',
-  'textureProjLod', 'textureProjLodOffset', 'textureGrad', 'textureGradOffset',
-  'textureProjGrad', 'textureProjGradOffset', 'textureGather',
-  'textureGatherOffset', 'texture1D', 'texture2D', 'texture3D', 'texture1DProj',
-  'texture2DProj', 'texture3DProj', 'texture1DLod', 'texture2DLod',
-  'texture3DLod', 'texture1DProjLod', 'texture2DProjLod', 'texture3DProjLod',
-  'textureCube', 'textureCubeLod', 'shadow1D', 'shadow2D',  'shadow1DProj',
-  'shadow2DProj', 'shadow1DLod', 'shadow2DLod', 'shadow1DProjLod',
-  'shadow2DProjLod', 'dFdx', 'dFdy', 'fwidth', 'interpolateAtCentroid',
-  'interpolateAtSample', 'interpolateAtOffset', 'noise1', 'noise2', 'noise3',
-  'noise4', 'EmitStreamVertex', 'EndStreamPrimitive', 'EmitVertex',
-  'EndPrimitive', 'barrier'
-})
-
--- Types.
-local type = token(l.TYPE,
-                   S('bdiu')^-1 * 'vec' * R('24') +
-                   P('d')^-1 * 'mat' * R('24') * ('x' * R('24')^-1) +
-                   S('iu')^-1 * 'sampler' * R('13') * 'D' +
-                   'sampler' * R('12') * 'D' * P('Array')^-1 * 'Shadow' +
-                   S('iu')^-1 * 'sampler' * (R('12') * 'DArray' + word_match{
-                     'Cube', '2DRect', 'Buffer', '2DMS', '2DMSArray',
-                     '2DMSCubeArray'
-                   }) +
-                   word_match{
-                     'samplerCubeShadow', 'sampler2DRectShadow',
-                     'samplerCubeArrayShadow'
-                   })
-
--- Variables.
-local variable = token(l.VARIABLE, word_match{
-  'gl_VertexID', 'gl_InstanceID', 'gl_Position', 'gl_PointSize',
-  'gl_ClipDistance', 'gl_PrimitiveIDIn', 'gl_InvocationID', 'gl_PrimitiveID',
-  'gl_Layer', 'gl_PatchVerticesIn', 'gl_TessLevelOuter', 'gl_TessLevelInner',
-  'gl_TessCoord', 'gl_FragCoord', 'gl_FrontFacing', 'gl_PointCoord',
-  'gl_SampleID', 'gl_SamplePosition', 'gl_FragColor', 'gl_FragData',
-  'gl_FragDepth', 'gl_SampleMask', 'gl_ClipVertex', 'gl_FrontColor',
-  'gl_BackColor', 'gl_FrontSecondaryColor', 'gl_BackSecondaryColor',
-  'gl_TexCoord', 'gl_FogFragCoord', 'gl_Color', 'gl_SecondaryColor',
-  'gl_Normal', 'gl_Vertex', 'gl_MultiTexCoord0', 'gl_MultiTexCoord1',
-  'gl_MultiTexCoord2', 'gl_MultiTexCoord3', 'gl_MultiTexCoord4',
-  'gl_MultiTexCoord5', 'gl_MultiTexCoord6', 'gl_MultiTexCoord7', 'gl_FogCoord'
-})
-
--- Constants.
-local constant = token(l.CONSTANT, word_match{
-  'gl_MaxVertexAttribs', 'gl_MaxVertexUniformComponents', 'gl_MaxVaryingFloats',
-  'gl_MaxVaryingComponents', 'gl_MaxVertexOutputComponents',
-  'gl_MaxGeometryInputComponents', 'gl_MaxGeometryOutputComponents',
-  'gl_MaxFragmentInputComponents', 'gl_MaxVertexTextureImageUnits',
-  'gl_MaxCombinedTextureImageUnits', 'gl_MaxTextureImageUnits',
-  'gl_MaxFragmentUniformComponents', 'gl_MaxDrawBuffers', 'gl_MaxClipDistances',
-  'gl_MaxGeometryTextureImageUnits', 'gl_MaxGeometryOutputVertices',
-  'gl_MaxGeometryTotalOutputComponents', 'gl_MaxGeometryUniformComponents',
-  'gl_MaxGeometryVaryingComponents', 'gl_MaxTessControlInputComponents',
-  'gl_MaxTessControlOutputComponents', 'gl_MaxTessControlTextureImageUnits',
-  'gl_MaxTessControlUniformComponents',
-  'gl_MaxTessControlTotalOutputComponents',
-  'gl_MaxTessEvaluationInputComponents', 'gl_MaxTessEvaluationOutputComponents',
-  'gl_MaxTessEvaluationTextureImageUnits',
-  'gl_MaxTessEvaluationUniformComponents', 'gl_MaxTessPatchComponents',
-  'gl_MaxPatchVertices', 'gl_MaxTessGenLevel', 'gl_MaxTextureUnits',
-  'gl_MaxTextureCoords', 'gl_MaxClipPlanes',
-
-  'gl_DepthRange', 'gl_ModelViewMatrix', 'gl_ProjectionMatrix',
-  'gl_ModelViewProjectionMatrix', 'gl_TextureMatrix', 'gl_NormalMatrix',
-  'gl_ModelViewMatrixInverse', 'gl_ProjectionMatrixInverse',
-  'gl_ModelViewProjectionMatrixInverse', 'gl_TextureMatrixInverse',
-  'gl_ModelViewMatrixTranspose', 'gl_ProjectionMatrixTranspose',
-  'gl_ModelViewProjectionMatrixTranspose', 'gl_TextureMatrixTranspose',
-  'gl_ModelViewMatrixInverseTranspose', 'gl_ProjectionMatrixInverseTranspose',
-  'gl_ModelViewProjectionMatrixInverseTranspose',
-  'gl_TextureMatrixInverseTranspose', 'gl_NormalScale', 'gl_ClipPlane',
-  'gl_Point', 'gl_FrontMaterial', 'gl_BackMaterial', 'gl_LightSource',
-  'gl_LightModel', 'gl_FrontLightModelProduct', 'gl_BackLightModelProduct',
-  'gl_FrontLightProduct', 'gl_BackLightProduct', 'gl_TextureEnvColor',
-  'gl_EyePlaneS', 'gl_EyePlaneT', 'gl_EyePlaneR', 'gl_EyePlaneQ',
-  'gl_ObjectPlaneS', 'gl_ObjectPlaneT', 'gl_ObjectPlaneR', 'gl_ObjectPlaneQ',
-  'gl_Fog'
-})
-
--- Extend cpp lexer to include GLSL elements.
-local cpp = l.load('cpp')
-local _rules = cpp._rules
-_rules[1] = {'whitespace', ws}
-table.insert(_rules, 2, {'glsl_keyword', keyword})
-table.insert(_rules, 3, {'glsl_function', func})
-table.insert(_rules, 4, {'glsl_type', type})
-table.insert(_rules, 5, {'glsl_variable', variable})
-M._rules = _rules
-M._foldsymbols = cpp._foldsymbols
-
-return M