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;; PURPOSE.
;;======================================================================
;;======================================================================
;; Config file handling
;;======================================================================
(use regex regex-case directory-utils)
(use regex regex-case) ;; directory-utils)
(declare (unit configf))
(declare (uses common))
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(if (file-exists? fullpath)
(list path fullpath configname)
(let ((remcwd (take dir (- (length dir) 1))))
(if (null? remcwd)
(list #f #f #f) ;; #f #f)
(loop remcwd)))))))))
(define (config:assoc-safe-add alist key val)
(define (config:assoc-safe-add alist key val #!key (metadata #f))
(let ((newalist (filter (lambda (x)(not (equal? key (car x)))) alist)))
(append newalist (list (list key val)))))
(append newalist (list (if metadata
(list key val metadata)
(list key val))))))
(define (config:eval-string-in-environment str)
(handle-exceptions
exn
(begin
(debug:print 0 #f "ERROR: problem evaluating \"" str "\" in the shell environment")
#f)
(let ((cmdres (cmd-run->list (conc "echo " str))))
(if (null? cmdres) ""
(caar cmdres))))
(let ((cmdres (process:cmd-run->list (conc "echo " str))))
(if (null? cmdres) ""
(caar cmdres)))))
;;======================================================================
;; Make the regexp's needed globally available
;;======================================================================
(define configf:include-rx (regexp "^\\[include\\s+(.*)\\]\\s*$"))
(define configf:section-rx (regexp "^\\[(.*)\\]\\s*$"))
(define configf:blank-l-rx (regexp "^\\s*$"))
(define configf:key-sys-pr (regexp "^(\\S+)\\s+\\[system\\s+(\\S+.*)\\]\\s*$"))
(define configf:key-val-pr (regexp "^(\\S+)(\\s+(.*)|())$"))
(define configf:key-no-val (regexp "^(\\S+)(\\s*)$"))
(define configf:comment-rx (regexp "^\\s*#.*"))
(define configf:cont-ln-rx (regexp "^(\\s+)(\\S+.*)$"))
(define configf:settings (regexp "^\\[configf:settings\\s+(\\S+)\\s+(\\S+)]\\s*$"))
;; read a line and process any #{ ... } constructs
(define configf:var-expand-regex (regexp "^(.*)#\\{(scheme|system|shell|getenv|get|runconfigs-get|rget)\\s+([^\\}\\{]*)\\}(.*)"))
(define (configf:process-line l ht allow-system)
(define (configf:process-line l ht allow-system #!key (linenum #f))
(let loop ((res l))
(if (string? res)
(let ((matchdat (string-search configf:var-expand-regex res)))
(if matchdat
(let* ((prestr (list-ref matchdat 1))
(cmdtype (list-ref matchdat 2)) ;; eval, system, shell, getenv
(cmd (list-ref matchdat 3))
(poststr (list-ref matchdat 4))
(result #f)
(start-time (current-seconds))
(cmdsym (string->symbol cmdtype))
(fullcmd (case (string->symbol cmdtype)
(fullcmd (case cmdsym
((scheme)(conc "(lambda (ht)" cmd ")"))
((system)(conc "(lambda (ht)(system \"" cmd "\"))"))
((shell) (conc "(lambda (ht)(shell \"" cmd "\"))"))
((getenv)(conc "(lambda (ht)(get-environment-variable \"" cmd "\"))"))
((get)
(let* ((parts (string-split cmd))
(sect (car parts))
(var (cadr parts)))
(conc "(lambda (ht)(config-lookup ht \"" sect "\" \"" var "\"))")))
((runconfigs-get) (conc "(lambda (ht)(runconfigs-get ht \"" cmd "\"))"))
((rget) (conc "(lambda (ht)(runconfigs-get ht \"" cmd "\"))"))
(else "(lambda (ht)(print \"ERROR\") \"ERROR\")"))))
;; (print "fullcmd=" fullcmd)
(handle-exceptions
exn
(begin
(debug:print 0 "ERROR: failed to process config input \"" l "\"")
(debug:print 0 #f "WARNING: failed to process config input \"" l "\"")
(debug:print 0 #f " message: " ((condition-property-accessor 'exn 'message) exn))
;; (print "exn=" (condition->list exn))
(set! result (conc "#{( " cmdtype ") " cmd"}")))
(if (or allow-system
(not (member cmdtype '("system" "shell"))))
(with-input-from-string fullcmd
(lambda ()
(set! result ((eval (read)) ht))))
(set! result (conc "#{(" cmdtype ") " cmd "}"))))
(case cmdsym
((system shell scheme)
(let ((delta (- (current-seconds) start-time)))
(if (> delta 2)
(debug:print-info 0 #f "for line \"" l "\"\n command: " cmd " took " delta " seconds to run with output:\n " result)
(debug:print-info 9 #f "for line \"" l "\"\n command: " cmd " took " delta " seconds to run with output:\n " result)))))
(loop (conc prestr result poststr)))
res))
res)))
;; Run a shell command and return the output as a string
(define (shell cmd)
(let* ((output (cmd-run->list cmd))
(let* ((output (process:cmd-run->list cmd))
(res (car output))
(status (cadr output)))
(if (equal? status 0)
(let ((outres (string-intersperse
res
"\n")))
(debug:print-info 4 "shell result:\n" outres)
(debug:print-info 4 #f "shell result:\n" outres)
outres)
(begin
(with-output-to-port (current-error-port)
(lambda ()
(print "ERROR: " cmd " returned bad exit code " status)))
""))))
;; Lookup a value in runconfigs based on -reqtarg or -target
(define (runconfigs-get config var)
(let ((targ (common:args-get-target))) ;; (or (args:get-arg "-reqtarg")(args:get-arg "-target")(getenv "MT_TARGET"))))
(if targ
(or (configf:lookup config targ var)
(configf:lookup config "default" var))
(configf:lookup config "default" var))))
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inl)
(else
(configf:process-line inl ht allow-processing)))))
(if (and (string? res)
(not (equal? (hash-table-ref/default settings "trim-trailing-spaces" "no") "no")))
(string-substitute "\\s+$" "" res)
res))))))
(define (read-config path ht allow-system #!key (environ-patt #f)(curr-section #f)(sections #f)(settings (make-hash-table)))
(debug:print-info 5 "read-config " path " allow-system " allow-system " environ-patt " environ-patt " curr-section: " curr-section " sections: " sections " pwd: " (current-directory))
(debug:print 9 "START: " path)
(define (read-config path ht allow-system #!key (environ-patt #f)(curr-section #f)(sections #f)(settings (make-hash-table))(keep-filenames #f)(post-section-procs '()))
(debug:print-info 5 #f "read-config " path " allow-system " allow-system " environ-patt " environ-patt " curr-section: " curr-section " sections: " sections " pwd: " (current-directory))
(debug:print 9 #f "START: " path)
(if (not (file-exists? path))
(begin
(debug:print-info 1 "read-config - file not found " path " current path: " (current-directory))
(debug:print-info 1 #f "read-config - file not found " path " current path: " (current-directory))
;; WARNING: This is a risky change but really, we should not return an empty hash table if no file read?
#f) ;; (if (not ht)(make-hash-table) ht))
(let ((inp (open-input-file path))
(res (if (not ht)(make-hash-table) ht)))
(let loop ((inl (configf:read-line inp res allow-system settings)) ;; (read-line inp))
(res (if (not ht)(make-hash-table) ht))
(metapath (if (or (debug:debug-mode 9)
keep-filenames)
path #f)))
(let loop ((inl (configf:read-line inp res (calc-allow-system allow-system curr-section sections) settings)) ;; (read-line inp))
(curr-section-name (if curr-section curr-section "default"))
(var-flag #f);; turn on for key-var-pr and cont-ln-rx, turn off elsewhere
(lead #f))
(debug:print-info 8 "curr-section-name: " curr-section-name " var-flag: " var-flag "\n inl: \"" inl "\"")
(debug:print-info 8 #f "curr-section-name: " curr-section-name " var-flag: " var-flag "\n inl: \"" inl "\"")
(if (eof-object? inl)
(begin
(close-input-port inp)
(hash-table-delete! res "") ;; we are using "" as a dumping ground and must remove it before returning the ht
(debug:print 9 "END: " path)
(debug:print 9 #f "END: " path)
res)
(regex-case
inl
(configf:comment-rx _ (loop (configf:read-line inp res allow-system settings) curr-section-name #f #f))
(configf:blank-l-rx _ (loop (configf:read-line inp res allow-system settings) curr-section-name #f #f))
(configf:comment-rx _ (loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))
(configf:blank-l-rx _ (loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))
(configf:settings ( x setting val ) (begin
(hash-table-set! settings setting val)
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f)))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f)))
(configf:include-rx ( x include-file ) (let* ((curr-conf-dir (pathname-directory path))
(full-conf (if (absolute-pathname? include-file)
include-file
(nice-path
(common:nice-path
(conc (if curr-conf-dir
curr-conf-dir
".")
"/" include-file)))))
(if (file-exists? full-conf)
(begin
;; (push-directory conf-dir)
(debug:print 9 "Including: " full-conf)
(read-config full-conf res allow-system environ-patt: environ-patt curr-section: curr-section-name sections: sections settings: settings)
(debug:print 9 #f "Including: " full-conf)
(read-config full-conf res allow-system environ-patt: environ-patt curr-section: curr-section-name sections: sections settings: settings keep-filenames: keep-filenames)
;; (pop-directory)
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))
(begin
(debug:print '(2 9) "INFO: include file " include-file " not found (called from " path ")")
(debug:print 2 " " full-conf)
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f)))))
(configf:section-rx ( x section-name ) (loop (configf:read-line inp res allow-system settings)
;; if we have the sections list then force all settings into "" and delete it later?
(if (or (not sections)
(member section-name sections))
section-name "") ;; stick everything into ""
#f #f))
(configf:key-sys-pr ( x key cmd ) (if allow-system
(let ((alist (hash-table-ref/default res curr-section-name '()))
(debug:print '(2 9) #f "INFO: include file " include-file " not found (called from " path ")")
(debug:print 2 #f " " full-conf)
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f)))))
(configf:section-rx ( x section-name ) (begin
;; call post-section-procs
(for-each
(lambda (dat)
(let ((patt (car dat))
(proc (cdr dat)))
(if (string-match patt curr-section-name)
(proc curr-section-name section-name res path))))
post-section-procs)
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings)
;; if we have the sections list then force all settings into "" and delete it later?
(if (or (not sections)
(member section-name sections))
section-name "") ;; stick everything into ""
#f #f)))
(configf:key-sys-pr ( x key cmd ) (if (calc-allow-system allow-system curr-section-name sections)
(let ((alist (hash-table-ref/default res curr-section-name '()))
(val-proc (lambda ()
(let* ((start-time (current-seconds))
(let* ((cmdres (cmd-run->list cmd))
(status (cadr cmdres))
(res (car cmdres)))
(debug:print-info 4 "" inl "\n => " (string-intersperse res "\n"))
(cmdres (process:cmd-run->list cmd))
(delta (- (current-seconds) start-time))
(status (cadr cmdres))
(res (car cmdres)))
(debug:print-info 4 #f "" inl "\n => " (string-intersperse res "\n"))
(if (not (eq? status 0))
(begin
(debug:print 0 "ERROR: problem with " inl ", return code " status
" output: " cmdres)
(debug:print 0 #f "ERROR: problem with " inl ", return code " status
" output: " cmdres)))
(exit 1)))
(case allow-system
(case (calc-allow-system allow-system curr-section-name sections)
((return-procs) val-proc)
((return-string) cmd)
(else (val-proc)))))
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f))
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f)))
(else (val-proc)))
metadata: metapath))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f)))
(configf:key-no-val ( x key val) (let* ((alist (hash-table-ref/default res curr-section-name '()))
(fval (or (if (string? val) val #f) ""))) ;; fval should be either "" or " " (one or more spaces)
(debug:print 10 #f " setting: [" curr-section-name "] " key " = #t")
(safe-setenv key fval)
(hash-table-set! res curr-section-name
(config:assoc-safe-add alist key fval metadata: metapath))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name key #f)))
(configf:key-val-pr ( x key unk1 val unk2 ) (let* ((alist (hash-table-ref/default res curr-section-name '()))
(envar (and environ-patt (string-search (regexp environ-patt) curr-section-name)))
(realval (if envar
(config:eval-string-in-environment val)
val)))
(debug:print-info 6 "read-config env setting, envar: " envar " realval: " realval " val: " val " key: " key " curr-section-name: " curr-section-name)
(debug:print-info 6 #f "read-config env setting, envar: " envar " realval: " realval " val: " val " key: " key " curr-section-name: " curr-section-name)
(if envar (safe-setenv key realval))
(debug:print 10 " setting: [" curr-section-name "] " key " = " val)
(debug:print 10 #f " setting: [" curr-section-name "] " key " = " val)
(hash-table-set! res curr-section-name
(config:assoc-safe-add alist key realval))
(loop (configf:read-line inp res allow-system settings) curr-section-name key #f)))
(config:assoc-safe-add alist key realval metadata: metapath))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name key #f)))
(configf:key-no-val ( x key val) (let* ((alist (hash-table-ref/default res curr-section-name '())))
(debug:print 10 " setting: [" curr-section-name "] " key " = #t")
(hash-table-set! res curr-section-name
(config:assoc-safe-add alist key #t))
(loop (configf:read-line inp res allow-system settings) curr-section-name key #f)))
(config:assoc-safe-add alist var-flag newval))
(loop (configf:read-line inp res allow-system settings) curr-section-name var-flag (if lead lead whsp)))
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f))))
(else (debug:print 0 "ERROR: problem parsing " path ",\n \"" inl "\"")
(config:assoc-safe-add alist var-flag newval metadata: metapath))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name var-flag (if lead lead whsp)))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))))
(else (debug:print 0 #f "ERROR: problem parsing " path ",\n \"" inl "\"")
(set! var-flag #f)
(loop (configf:read-line inp res allow-system settings) curr-section-name #f #f))))))))
(loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))))))))
;; pathenvvar will set the named var to the path of the config
(define (find-and-read-config fname #!key (environ-patt #f)(given-toppath #f)(pathenvvar #f))
(let* ((curr-dir (current-directory))
(configinfo (find-config fname toppath: given-toppath))
(toppath (car configinfo))
(configfile (cadr configinfo)))
(configfile (cadr configinfo))
(set-fields (lambda (curr-section next-section ht path)
(let ((field-names (if ht (keys:config-get-fields ht) '()))
(target (or (getenv "MT_TARGET")(args:get-arg "-reqtarg")(args:get-arg "-target"))))
(debug:print-info 9 #f "set-fields with field-names=" field-names " target=" target " curr-section=" curr-section " next-section=" next-section " path=" path " ht=" ht)
(if (not (null? field-names))(keys:target-set-args field-names target #f))))))
(if toppath (change-directory toppath))
(if (and toppath pathenvvar)(setenv pathenvvar toppath))
(let ((configdat (if configfile (read-config configfile #f #t environ-patt: environ-patt) #f))) ;; (make-hash-table))))
(let ((configdat (if configfile
(read-config configfile #f #t environ-patt: environ-patt post-section-procs: (list (cons "^fields$" set-fields)) #f))))
(if toppath (change-directory curr-dir))
(list configdat toppath configfile fname))))
(define (config-lookup cfgdat section var)
(if (hash-table? cfgdat)
(let ((sectdat (hash-table-ref/default cfgdat section '())))
(if (null? sectdat)
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(set! res (append res (list hed))))
((not newval) ;; key has been removed
(set! new #f))
((not (equal? newval val))
(hash-table-set! sechash key newval)
(set! new (conc key " " newval)))
(else
(debug:print 0 "ERROR: problem parsing line number " lnum "\"" hed "\"")))))
(debug:print 0 #f "ERROR: problem parsing line number " lnum "\"" hed "\"")))))
(else
(debug:print 0 "ERROR: Problem parsing line num " lnum " :\n " hed )))
(debug:print 0 #f "ERROR: Problem parsing line num " lnum " :\n " hed )))
(if (not (null? tal))
(loop (car tal)(cdr tal)(if new (append res (list new)) res)(+ lnum 1)))
;; drop to here when done processing, res contains modified list of lines
(set! fdat res)))
;; step 4: Append new values to the section
(for-each
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(with-input-from-file fname read)))
(define (configf:write-alist cdat fname)
(with-output-to-file fname
(lambda ()
(pp (configf:config->alist cdat)))))
;; convert hierarchial list to ini format
;;
(define (configf:config->ini data)
(map
(lambda (section)
(let ((section-name (car section))
(section-dat (cdr section)))
(print "\n[" section-name "]")
(map (lambda (dat-pair)
(let* ((var (car dat-pair))
(val (cadr dat-pair))
(fname (if (> (length dat-pair) 2)(caddr dat-pair) #f)))
(if fname (print "# " var "=>" fname))
(print var " " val)))
section-dat))) ;; (print "section-dat: " section-dat))
(hash-table->alist data)))
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