ecl: Cannot open "SYS:help.doc" (logical-pathname-translations setup incorrect)

[mkoeppe]

>>> from sage.libs.ecl import ecl_eval
>>> ecl_eval('(load "/asdf.fasc")')
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Cell In[5], line 1
----> 1 ecl_eval('(load "/asdf.fasc")')

File sage/libs/ecl.pyx:1336, in sage.libs.ecl.ecl_eval()

File sage/libs/ecl.pyx:1363, in sage.libs.ecl.ecl_eval()

File sage/libs/ecl.pyx:1359, in sage.libs.ecl.ecl_eval()

File sage/libs/ecl.pyx:326, in sage.libs.ecl.ecl_safe_eval()

RuntimeError: ECL says: Cannot open "SYS:help.doc".
C library error: No such file or directory
while evaluating (load "/asdf.fasc")

>>> ecl_eval('(translate-logical-pathname "SYS:help.doc")')
<ECL: #P"/drive/content/help.doc">

@wangyenshu

[mkoeppe]

After the change to a non-flat install (#6137),

>>> ecl_eval('(setf (logical-pathname-translations "SYS") (list (list #p"sys:**;*.*" #p"/lib/ecl-26.5.5/**/*.*")))') 
<ECL: ((#P"SYS:**;*.*" #P"/lib/ecl-26.5.5/**/*.*"))>

fixes this problem:

>>> ecl_eval('(open "sys:help.doc")')
<ECL: #<input stream "sys:help.doc" 0x5c07720>>
>>> ecl_eval('(load "sys:asdf.fasc")')
<ECL: #P"/lib/ecl-26.5.5/asdf.fasc">

FYI @dkochmanski @MariusGerbershagen - looks like the logical-pathname-translations are also affected by the flat layout somehow and the above workaround is necessary here.