On 1/23/2025 7:25 PM, krulis.to...@seznam.cz wrote:
Dear ConTeXt mailing list,
I've been struggling with loading the sqlite external lua library. I tried the
following:
1. Instaling the system package and running ConTeXt with the `--permitloadlib`
option (I am running Manjaro, an arch-linux derivative:
https://archlinux.org/packages/core/x86_64/sqlite/)
2. Installing the luarocks package
(https://luarocks.org/modules/dougcurrie/lsqlite3) for the 5.1, 5.3 and 5.4 lua
versions. I also tried to symlink the files in
$HOME/.luarocks/lib/lua/{version}/lsqlite3.so to the project directory
3. I tried also setting the relevant lua paths with `eval $(luarocks path)`.
The compilation always fails with an error that context can't locate the
sqlite3 library.
How can I load data from sqlite database during context compilation? As an MWE,
I am adding the example in the documentation for the interaction with sqlite
from the context garden
(https://www.pragma-ade.nl/general/manuals/sql-mkiv.pdf):
```tex
\starttext
\startluacode
require("util-sql")
utilities.sql.setmethod("sqlite")
require("util-sql-loggers")
local loggers = utilities.sql.loggers
local presets = {
-- method = "sqlite",
database = "loggertest",
datatable = "loggers",
id = "loggers",
}
os.remove("loggertest.db") -- start fresh
local db = loggers.createdb(presets)
loggers.save(db, { -- variant 1: data subtable
type = "error",
action = "process",
data = { filename = "test-1", message = "whatever a" }
} )
loggers.save(db, { -- variant 2: flat table
type = "warning",
action = "process",
filename = "test-2",
message = "whatever b"
} )
local result = loggers.collect(db, {
start = {
day = 1,
month = 1,
year = 2016,
},
stop = {
day = 31,
month = 12,
year = 2116,
},
limit = 1000000,
-- type = "error",
action = "process"
})
context.starttabulate { "||||||" }
for i=1,#result do
local r = result[i]
context.NC() context(r.time)
context.NC() context(r.type)
context.NC() context(r.action)
if r.data then
context.NC() context(r.data.filename)
context.NC() context(r.data.message)
else
context.NC()
context.NC()
end
context.NC() context.NR()
end
context.stoptabulate()
-- local result = loggers.cleanup(db, {
-- before = {
-- day = 1,
-- month = 1,
-- year = 2117,
-- },
-- })
\stopluacode
\stoptext
```
I am sorry for the poor quality of the example, but I don't know how to add an
attachment to a message in a mailing list.
I have found a few references on the web and on this mailing list
(https://mailman.ntg.nl/archives/list/ntg-context@ntg.nl/message/IDZBJQIXG3JIG5O5CNUNXUIPGR4UFTWE/),
but I wasn't able to figure out what I could be doing wrong. I found a
reference that the issue might be a version mismatch, so I tested multiple lua
versions.
My project is about using multiple data sources in multiple formats and
creating reports from them. I know I will definitely need to load YAML as well
(with the `lyaml` luarocks package I guess). There's always the alternative of
trying to use other programs to get the data, but I was wondering if I could
leverage ConTeXt to do that directly.
Thank you for any guidance on this, and I hope this message is not too long ...
On my machine I have:
Directory of e:\tex-context\tex\texmf-win64\bin\lib\luametatex\sqlite
06/16/2017 10:24 AM 1,730,048 sqlite3.dll
so, you should put sqlite3.so in a similar place in your texmf-linux tree
just the regular lib, nothing needs to be compiled for lua
\usewmodule[sql]
should load the right thing then
Hans
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