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https://github.com/fish-shell/fish-shell.git
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d7bc20c933
Another developer noticed that redirecting stdin of `fish_key_reader` results in weird behavior. Which is not at all surprising. So add checks to ensure stdin and stdout are attached to a tty. Add some rudimentary unit tests for this program.
274 lines
8.2 KiB
Plaintext
274 lines
8.2 KiB
Plaintext
# vim: set filetype=expect sw=4 ts=4 et:
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log_user 0
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log_file -noappend interactive.tmp.log
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set fish ../test/root/bin/fish
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set fish_key_reader ../test/root/bin/fish_key_reader
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set timeout 5
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set send_human {.05 .1 5 .02 .2}
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proc abort {{msg "aborting"}} {
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error $msg
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exit 1
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}
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# # Debug logging
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set loglevel debug ;# none, info, debug
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proc log_info string {
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global loglevel
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switch $loglevel {
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info -
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debug {
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send_log "\[INFO] $string\n"
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}
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}
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}
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proc log_debug string {
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global loglevel
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switch $loglevel {
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debug {
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send_log "\[DEBUG] $string\n"
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}
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}
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}
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# Utilities
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set prompt_counter 1
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# expect_prompt takes an argument list like `expect` does.
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# It supports a special pattern "unmatched" that is run if no
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# other provided patterns match, and a special flag "-nounmatched"
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# that marks the following pattern as not being tracked for
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# "unmatched" handling.
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# If multiple patterns are provided, they may all match. Each pattern
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# is matched at most once. The matching only ends once the prompt is
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# found.
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proc expect_prompt {args} {
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global prompt_counter
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upvar expect_out expect_out
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set prompt_pat [list -re "(?:\\r\\n?|^)(?:\\\[.\\\] )?prompt $prompt_counter>(?:$|\\r)"]
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if {[llength $args] == 1 && [string match "\n*" $args]} {
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set args [join $args]
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}
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set prompt_action ""
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set expargs {}
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set debugpats {}
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set nounmatched no
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set matchidx 0
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set matched(any) no
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set state "firstarg"
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foreach arg $args {
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switch $state {
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"pat" {
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lappend expargs $arg
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set state "action"
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}
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"action" {
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lappend debugpats [lindex $expargs end]
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lappend expargs [subst -nocommands {
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log_debug "matched extra pattern to expect_prompt: [quote \$expect_out(0,string)]"
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if {!\$matched($matchidx)} {
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set matched($matchidx) yes
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if {!$nounmatched} { set matched(any) yes }
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uplevel 1 {$arg}
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}
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exp_continue
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}]
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set matched($matchidx) no
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incr matchidx
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set state "firstarg"
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set nounmatched no
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}
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"firstarg" -
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"arg" {
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if {$arg eq "unmatched" && $state eq "firstarg"} {
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set state "unmatched"
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continue
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}
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set keep yes
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switch -glob -- $arg {
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-gl -
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-re -
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-ex {
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lappend debugpats $arg
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set state "pat"
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}
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-i -
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-timeout {
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set state "flagarg"
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}
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-nounmatched {
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set keep no
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set nounmatched yes
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set state "arg"
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}
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-* {
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error "BUG: unknown expect flag in expect_prompt"
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}
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default {
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set state "action"
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}
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}
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if {$keep} {
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lappend expargs $arg
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}
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}
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"flagarg" {
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lappend expargs $arg
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set state "arg"
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}
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"unmatched" {
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set state "firstarg"
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if {$prompt_action ne ""} continue
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set prompt_action [subst -nocommands {
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if {!\$matched(any)} {
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log_debug "triggered unmatched action in expect_prompt"
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log_debug "expect buffer: [quote \$expect_out(buffer)]"
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uplevel 1 {$arg}
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}
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}]
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}
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default {
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error "BUG: non-exhaustive switch in expect_prompt"
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}
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}
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}
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if {[llength $debugpats] > 0} {
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log_info "expecting prompt $prompt_counter + \[$debugpats]"
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} else {
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log_info "expecting prompt $prompt_counter"
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}
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set expargs [concat $expargs $prompt_pat [list $prompt_action]]
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expect {*}$expargs
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incr prompt_counter
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}
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trace add execution expect {enter leave} trace_expect
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proc trace_expect {cmd args} {
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if {[lindex $cmd 1] eq "*" && [llength $cmd] == 3} {
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# it's an `expect "*" {..}` command, don't log it
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return
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}
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switch [lindex $args end] {
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enter {
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log_debug "entering expect"
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uplevel {set expect_out(buffer) {}}
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}
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leave {
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set code [lindex $args 0]
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if {$code == 0} {
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log_debug "expect finished: [quote [uplevel set expect_out(buffer)]]"
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} else {
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log_debug "expect returned code $code"
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}
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}
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}
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}
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trace add execution exp_continue enter trace_exp_continue
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proc trace_exp_continue {cmd op} {
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log_debug "exp_continue after consuming: [quote [uplevel set expect_out(buffer)]]"
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}
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trace add execution send enter trace_send
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proc trace_send {cmd op} {
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log_info "[quote $cmd]"
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}
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trace add execution spawn {enter leave} trace_spawn
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proc trace_spawn {cmd args} {
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switch [lindex $args end] {
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enter {
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log_info "[quote $cmd]"
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}
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leave {
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log_debug "[quote $cmd]: code [lindex $args 0], result [lindex $args 1]"
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expect_after {
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timeout {
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expect "*" {
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log_debug "timeout; buffer=[quote $expect_out(buffer)]"
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}
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abort "timeout"
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}
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eof {
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log_debug "eof; buffer=[quote $expect_out(buffer)]"
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# even though we're about to abort, we want to wait so we can get the status
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# note: it's possible that fish could have closed its end and then hung, and
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# expect doesn't provide any way to set a timeout for wait. But I think that's
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# an acceptable risk.
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puts stderr "eof; waiting on child process to exit"
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set status [wait]
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if {[lindex $status 2] == -1} {
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# operating system error
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puts stderr "error: OS error code [lindex $status 3]"
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} else {
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set msg "process [lindex $status 0] exited with status [lindex $status 3]"
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if {[llength $status] > 4} {
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append msg " ([lrange $status 4 end])"
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}
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puts stderr $msg
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}
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abort "eof"
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}
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}
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}
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}
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}
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proc quote string {
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set map {
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\\ \\\\
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\r \\r
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\n \\n
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\t \\t
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\a \\a
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\v \\v
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\x1b \\e
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\x7f \\x7f
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}
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for {set x 0} {$x<32} {incr x} {
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lappend map [format %c $x] [format \\x%02x $x]
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}
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string map $map $string
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}
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proc send_line args {
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if {[llength $args] > 0} {
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lset args end [lindex $args end]\r
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}
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send {*}$args
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}
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proc rand_int {low hi} {
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expr {entier(rand() * ($hi-$low))+$low}
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}
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# prints the output of `_echo_var $name` (defined in interactive.config)
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proc print_var_contents name {
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# generate a random "guard" so we know where to stop matching
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# the randomness is to defend against the variable value containing the guard
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set guard [rand_int 1000000000 9999999999]
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# print the variable
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log_info "get_var_contents: $$name"
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send_line "_echo_var $name $guard"
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# match on the results
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set pat {\r\n@GUARD:$guard@\r\n(.*)\r\n@/GUARD:$guard@\r\n}
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expect_prompt -re [subst -nocommands -nobackslashes $pat] {
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log_info "get_var_contents: result: [quote $expect_out(1,string)]"
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puts $expect_out(1,string)
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exp_continue
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} unmatched {
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log_debug "unmatched: [quote $expect_out(buffer)]"
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abort "Didn't match output for variable $$name"
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}
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}
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