diff options
Diffstat (limited to 'tex/context/base/file-res.lua')
| -rw-r--r-- | tex/context/base/file-res.lua | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/tex/context/base/file-res.lua b/tex/context/base/file-res.lua new file mode 100644 index 000000000..cd301d656 --- /dev/null +++ b/tex/context/base/file-res.lua @@ -0,0 +1,107 @@ +if not modules then modules = { } end modules ['supp-fil'] = { + version = 1.001, + comment = "companion to supp-fil.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +local format = string.format +local isfile = lfs.isfile + +local trace_files = false trackers.register("resolvers.readfile", function(v) trace_files = v end) +local report_files = logs.reporter("files","readfile") + +resolvers.maxreadlevel = 2 + +directives.register("resolvers.maxreadlevel", function(v) resolvers.maxreadlevel = tonumber(v) or resolvers.maxreadlevel end) + +local finders, loaders, openers = resolvers.finders, resolvers.loaders, resolvers.openers + +local found = { } -- can best be done in the resolver itself + +local function readfilename(specification,backtrack,treetoo) + local name = specification.filename + local fnd = found[name] + if not fnd then + if isfile(name) then + if trace_files then + report_files("found local: %s",name) + end + fnd = name + end + if not fnd and backtrack then + local fname = name + for i=1,backtrack,1 do + fname = "../" .. fname + if isfile(fname) then + if trace_files then + report_files("found by backtracking: %s",fname) + end + fnd = fname + break + elseif trace_files then + report_files("not found by backtracking: %s",fname) + end + end + end + if not fnd and treetoo then + fnd = resolvers.findtexfile(name) or "" + if trace_files then + if fnd ~= "" then + report_files("found by tree lookup: %s",fnd) + else + report_files("not found by tree lookup: %s",name) + end + end + end + found[name] = fnd + elseif trace_files then + if fnd ~= "" then + report_files("already found: %s",fnd) + else + report_files("already not found: %s",name) + end + end + return fnd or "" +end + +function finders.job(specification) return readfilename(specification,false, false) end -- current path, no backtracking +function finders.loc(specification) return readfilename(specification,resolvers.maxreadlevel,false) end -- current path, backtracking +function finders.sys(specification) return readfilename(specification,false, true ) end -- current path, obeys tex search +function finders.fix(specification) return readfilename(specification,resolvers.maxreadlevel,false) end -- specified path, backtracking +function finders.set(specification) return readfilename(specification,false, false) end -- specified path, no backtracking +function finders.any(specification) return readfilename(specification,resolvers.maxreadlevel,true ) end -- loc job sys + +openers.job = openers.file loaders.job = loaders.file -- default anyway +openers.loc = openers.file loaders.loc = loaders.file +openers.sys = openers.file loaders.sys = loaders.file +openers.fix = openers.file loaders.fix = loaders.file +openers.set = openers.file loaders.set = loaders.file +openers.any = openers.file loaders.any = loaders.file + +function getreadfilename(scheme,path,name) -- better do a split and then pass table + local fullname + if url.hasscheme(name) then + fullname = name + else + fullname = ((path == "") and format("%s:///%s",scheme,name)) or format("%s:///%s/%s",scheme,path,name) + end + return resolvers.findtexfile(fullname) or "" -- can be more direct +end + +resolvers.getreadfilename = getreadfilename + +function commands.getreadfilename(scheme,path,name) + context(getreadfilename(scheme,path,name)) +end + +-- a name belonging to the run but also honoring qualified + +function commands.locfilename(name) + context(getreadfilename("loc",".",name)) +end + +function commands.doiflocfileelse(name) + commands.doifelse(isfile(getreadfilename("loc",".",name))) +end |