ref: 02ac617541ca1a7bf82b1615fb5a58235469b5d3
dir: /appl/alphabet/fs/run.b/
implement Run, Fsmodule; include "sys.m"; sys: Sys; include "draw.m"; include "sh.m"; sh: Sh; Context: import sh; include "alphabet/reports.m"; Report: import Reports; include "alphabet/fs.m"; fs: Fs; Value: import fs; Fschan, Fsdata, Entrychan, Entry, Gatechan, Gatequery, Nilentry, Option, Next, Down, Skip, Quit: import Fs; Run: module {}; types(): string { return "sc"; } badmod(p: string) { sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p); raise "fail:bad module"; } init() { sys = load Sys Sys->PATH; fs = load Fs Fs->PATH; if(fs == nil) badmod(Fs->PATH); fs->init(); sh = load Sh Sh->PATH; if(sh == nil) badmod(Sh->PATH); sh->initialise(); } run(drawctxt: ref Draw->Context, nil: ref Report, nil: list of Option, args: list of ref Value): ref Value { c := (hd args).c().i; ctxt := Context.new(drawctxt); ctxt.setlocal("s", nil); { ctxt.run(ref Sh->Listnode(c, nil)::nil, 0); } exception e { "fail:*" => sys->fprint(sys->fildes(2), "fs: run: exception %q raised in %s\n", e[5:], sh->cmd2string(c)); return nil; } sl := ctxt.get("s"); if(sl == nil || tl sl != nil){ sys->fprint(sys->fildes(2), "fs: run: $s has %d members; exactly one is required\n", len sl); return nil; } s := (hd sl).word; if(s == nil && (hd sl).cmd != nil) s = sh->cmd2string((hd sl).cmd); return ref Value.Vs(s); }