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# Barebones Dockerfile syntax for JOE. Doesn't handle more sophisticated sh syntax.
=Idle
=Command bold
=Comment green
=Constant cyan
=Ident cyan
=Escape magenta
=Keyword bold
=Var bold cyan
=Bad bold red
# Start of line is special
:start Idle
* idle
" \t" start
"#" comment noeat
"A-Za-z" command buffer noeat
"\n" start
# Comments between commands
:comment Comment
* comment
"\n" start
# Comments in the middle of a command
:comment_idle Comment
* comment_idle
"\n" idle
# Start of line in the middle of "idle" mode (skips command recognition in case a comment
# comes in the middle of a RUN)
:start_idle Idle
* idle noeat
"#" comment_idle recolor=-1
# Generic middle-of-a-command
:idle Idle
* idle
"$" idle recolor=-1 call=.variable()
"\n" start
"\\" escape recolor=-1
:escape Escape
* idle recolor=-2 noeat
"\\\"" idle
"\r" escape
"\n" start_idle
:command Idle
* idle noeat istrings
"FROM" from
"MAINTAINER" string_command
"RUN" list_command
"CMD" list_command
"SHELL" list_command
"LABEL" label
"EXPOSE" generic_command
"ENV" generic_command
"ADD" list_command
"COPY" list_command
"ENTRYPOINT" list_command
"VOLUME" list_command
"USER" string_command
"WORKDIR" string_command
"ARG" generic_command
"ONBUILD" generic_command
"STOPSIGNAL" generic_command
"HEALTHCHECK" healthcheck_command
done
"a-zA-Z" command
# EXPOSE, ENV, ARG, ONBUILD, STOPSIGNAL
:generic_command Command
* idle
# MAINTAINER, USER, WORKDIR
:string_command Command
* string_command_data
:string_command_data Ident
* string_command_data
"$" string_command_data recolor=-1 call=.variable()
"\n" start
# FROM
:from Command
* from_image noeat
:from_image Ident
* from_image
":@" from_tag noeat
"\n" start
:from_tag Idle
* from_tag
"\n" start
# RUN, CMD, ADD, COPY, ENTRYPOINT, VOLUME
:list_command Command
* idle noeat
" \t" list_command
"[" array noeat
"\n" start
:array Idle
* array
"[]" bracket noeat
"\"" array recolor=-1 call=.string() save_c
"'" array_bad noeat
"\n" start
:array_bad Bad
* array
:comma Idle
* array noeat
:bracket Escape
"]" idle
"[" array
# LABEL
:label Command
* label_key
"\n" start
:label_key Ident
* label_key
"=" label_value noeat
"\n" start
:label_value Idle
* label_value
"\"" label_value recolor=-1 call=.string() save_c
"\n" start
# HEALTHCHECK
:healthcheck_command Command
* idle noeat
"a-zA-Z" healthcheck_argument buffer noeat
"\-" healthcheck_option recolor=-1
" \t" healthcheck_command
"\\" healthcheck_escape recolor=-1
:healthcheck_argument Idle
* idle noeat istrings
"NONE" healthcheck_none
"CMD" list_command
done
"a-zA-Z" healthcheck_argument
:healthcheck_option Ident
* healthcheck_option
"\n" start
"\\" healthcheck_escape recolor=-1
" \t" healthcheck_command
"=" healthcheck_value
:healthcheck_value Idle
* healthcheck_value
"\n" start
"\\" healthcheck_escape
" \t" healthcheck_command
:healthcheck_escape Escape
"\r" healthcheck_escape
* healthcheck_command
:healthcheck_none Command
* idle noeat
.subr variable
:variable Var
* variable recolor=-2 return noeat
"A-Za-z_" variable_name
"{" variable_long
:variable_name Var
* variable_name return noeat
"A-Za-z0-9_" variable_name
:variable_long Var
* variable_long
& variable return noeat
"\n" variable return noeat
"}" variable return
":" variable_after
:variable_after Idle
* variable_after
& variable_after return noeat
"}" variable_long noeat
.end
.subr string
:string Constant
* string
& string return
"\n" string return noeat
"\\" string_escape recolor=-1
"$" string recolor=-1 call=.variable()
:string_escape Escape
* string
.end
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