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-rw-r--r--scripts/context/lua/mtxrun.lua39
1 files changed, 36 insertions, 3 deletions
diff --git a/scripts/context/lua/mtxrun.lua b/scripts/context/lua/mtxrun.lua
index 41adb5d43..69722cc55 100644
--- a/scripts/context/lua/mtxrun.lua
+++ b/scripts/context/lua/mtxrun.lua
@@ -2286,7 +2286,7 @@ if not modules then modules = { } end modules ['l-os'] = {
-- maybe build io.flush in os.execute
local os = os
-local find, format, gsub, upper = string.find, string.format, string.gsub, string.upper
+local find, format, gsub, upper, gmatch = string.find, string.format, string.gsub, string.upper, string.gmatch
local concat = table.concat
local random, ceil = math.random, math.ceil
local rawget, rawset, type, getmetatable, setmetatable, tonumber = rawget, rawset, type, getmetatable, setmetatable, tonumber
@@ -2392,9 +2392,9 @@ os.type = os.type or (io.pathseparator == ";" and "windows") or "unix"
os.name = os.name or (os.type == "windows" and "mswin" ) or "linux"
if os.type == "windows" then
- os.libsuffix, os.binsuffix = 'dll', 'exe'
+ os.libsuffix, os.binsuffix, os.binsuffixes = 'dll', 'exe', { 'exe', 'cmd', 'bat' }
else
- os.libsuffix, os.binsuffix = 'so', ''
+ os.libsuffix, os.binsuffix, os.binsuffixes = 'so', '', { '' }
end
function os.launch(str)
@@ -2625,6 +2625,39 @@ function os.timezone(delta)
end
end
+local memory = { }
+
+local function which(filename)
+ local fullname = memory[filename]
+ if fullname == nil then
+ local suffix = file.suffix(filename)
+ local suffixes = suffix == "" and os.binsuffixes or { suffix }
+ for directory in gmatch(os.getenv("PATH"),"[^" .. io.pathseparator .."]+") do
+ local df = file.join(directory,filename)
+ for i=1,#suffixes do
+ local dfs = file.addsuffix(df,suffixes[i])
+ if io.exists(dfs) then
+ fullname = dfs
+ break
+ end
+ end
+ end
+ if not fullname then
+ fullname = false
+ end
+ memory[filename] = fullname
+ end
+ return fullname
+end
+
+os.which = which
+os.where = which
+
+-- print(os.which("inkscape.exe"))
+-- print(os.which("inkscape"))
+-- print(os.which("gs.exe"))
+-- print(os.which("ps2pdf"))
+
end -- of closure