Initial commit

The rules are still very basic; in particular, the latex rules do not
support bibtex. Nevertheless, having typesetting rules in that basic
form is already useful, especially when creating documents (slides,
handbooks, web pages, etc) containing generated files, like sample
logs of tools under development.

Co-authored-by: Oliver Reiche <oliver.reiche@huawei.com>

11 files changed, 1227 insertions, 0 deletions

diff --git a/EXPRESSIONS b/EXPRESSIONS
new file mode 100644
index 0000000..f1ca6f4
--- /dev/null
+++ b/EXPRESSIONS
@@ -0,0 +1,46 @@
+{ "stage_singleton_field":
+  { "vars": ["fieldname", "transition", "location"]
+  , "expression":
+    { "type": "assert_non_empty"
+    , "msg":
+      ["No artifact specified in field", {"type": "var", "name": "fieldname"}]
+    , "$1":
+      { "type": "disjoint_map_union"
+      , "msg":
+        [ "Expecting (essentially) a single artifact in field"
+        , {"type": "var", "name": "fieldname"}
+        ]
+      , "$1":
+        { "type": "foreach"
+        , "var": "src"
+        , "range":
+          {"type": "FIELD", "name": {"type": "var", "name": "fieldname"}}
+        , "body":
+          { "type": "disjoint_map_union"
+          , "$1":
+            { "type": "foreach"
+            , "var": "artifact"
+            , "range":
+              { "type": "values"
+              , "$1":
+                { "type": "DEP_ARTIFACTS"
+                , "dep": {"type": "var", "name": "src"}
+                , "transition":
+                  { "type": "var"
+                  , "name": "transition"
+                  , "default": {"type": "empty_map"}
+                  }
+                }
+              }
+            , "body":
+              { "type": "singleton_map"
+              , "key": {"type": "var", "name": "location"}
+              , "value": {"type": "var", "name": "artifact"}
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..83c2fae
--- /dev/null
+++ b/README.md
@@ -0,0 +1,23 @@
+# Typesetting rules for the `just` build system
+
+A collection of rules related to typesetting.
+
+- Latex
+  - `["latex", "standalone"]` Simple rule to generate a `pdf` file,
+    given a collection of source files and the entry point.
+  - `["latex", "verbatim"]` Auxiliary target to wrap a file in a
+    `verbatim` environment. Useful if the source file is generated,
+    e.g., a sample run of a tool under development.
+  - `["ps", "family"]` Generate a collection of `eps` files from
+    a single `eps` file by replacing the definition of `stage` and
+    `drawbb`. While not strictly related to latex, usually used
+    for "animated" diagrams in slides.
+- Pandoc
+  - `["pandoc", "standalone"]` Generate a single output file from
+    a given list of files in order and a template.
+  - `["pandoc", "template"]` Specify a template for pandoc by
+    specifying additional arguments and files for a pandoc invocation.
+  - `["files", "ordered"]` Specify a list of files in order. In
+    this way, a sequence of files can be specified in a single
+    place, even so it is used in different pandoc targets, e.g.,
+    to render with different templates.
diff --git a/files/EXPRESSIONS b/files/EXPRESSIONS
new file mode 100644
index 0000000..7a418c4
--- /dev/null
+++ b/files/EXPRESSIONS
@@ -0,0 +1,36 @@
+{ "order":
+  { "expression":
+    { "type": "++"
+    , "$1":
+      { "type": "foreach"
+      , "var": "dep"
+      , "range": {"type": "FIELD", "name": "srcs"}
+      , "body":
+        { "type": "if"
+        , "cond":
+          { "type": "DEP_PROVIDES"
+          , "dep": {"type": "var", "name": "dep"}
+          , "provider": "keys"
+          }
+        , "then":
+          { "type": "DEP_PROVIDES"
+          , "dep": {"type": "var", "name": "dep"}
+          , "provider": "keys"
+          }
+        , "else":
+          { "type": "keys"
+          , "$1":
+            { "type": "map_union"
+            , "$1":
+              [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "dep"}}
+              , { "type": "DEP_ARTIFACTS"
+                , "dep": {"type": "var", "name": "dep"}
+                }
+              ]
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/files/RULES b/files/RULES
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index 0000000..891ff55
--- /dev/null
+++ b/files/RULES
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+{ "ordered":
+  { "doc":
+    [ "Collect the runfiles and artifacts of the \"srcs\" targets, keeping"
+    , "record of the order of the targets (in a provider). In this way,"
+    , "a sequence of files can be described at a single place and used later"
+    , "in several targets where order matters and the respective provider is"
+    , "supported. As this rule supports its own provider, chaining is possible."
+    ]
+  , "target_fields": ["srcs"]
+  , "field_doc":
+    { "srcs":
+      [ "The files to include, in order. For targets that are defined by this"
+      , "rule, the provided order in honored."
+      ]
+    }
+  , "artifacts_doc":
+    [ "The runfiles and artifacts of the \"srcs\" field."
+    , "Within each target, artifacts take precedence; different targets in"
+    , "the \"srcs\" field may not conflict"
+    ]
+  , "runfiles_doc": ["Same as artifacts"]
+  , "provides_doc":
+    {"keys": ["The keys of the artifacts in the intended order."]}
+  , "imports": {"order": "order"}
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "srcs"
+        , { "type": "disjoint_map_union"
+          , "msg": "Sources may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "srcs"}
+            , "body":
+              { "type": "map_union"
+              , "$1":
+                [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+                , { "type": "DEP_ARTIFACTS"
+                  , "dep": {"type": "var", "name": "x"}
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      , ["order", {"type": "CALL_EXPRESSION", "name": "order"}]
+      ]
+    , "body":
+      { "type": "RESULT"
+      , "runfiles": {"type": "var", "name": "srcs"}
+      , "artifacts": {"type": "var", "name": "srcs"}
+      , "provides":
+        { "type": "singleton_map"
+        , "key": "keys"
+        , "value": {"type": "var", "name": "order"}
+        }
+      }
+    }
+  }
+}
diff --git a/latex/RULES b/latex/RULES
new file mode 100644
index 0000000..89683a9
--- /dev/null
+++ b/latex/RULES
@@ -0,0 +1,314 @@
+{ "standalone":
+  { "doc":
+    [ "A standalone latex run"
+    , ""
+    , "Define a pdf file as the output of running pdflatex. A correct staging"
+    , "of the needed files has to be given through the runfiles of \"deps\"."
+    ]
+  , "target_fields": ["deps", "srcs"]
+  , "string_fields": ["main", "stage"]
+  , "field_doc":
+    { "srcs": ["The files needed for the latex run."]
+    , "stage":
+      [ "The directory the \"srcs\" logically reside in."
+      , "Entries are joined with \"/\"."
+      ]
+    , "deps":
+      ["Runfiles needed for the run of the standalone latex invocation"]
+    , "main":
+      [ "The entry point for the latex run; should be the base name"
+      , "of a .tex file in \"srcs\"; the \"stage\" is prepended automatically."
+      ]
+    }
+  , "config_fields": ["env", "latex"]
+  , "config_doc":
+    { "latex": ["Name of the latex command, defaults to \"pdflatex\"."]
+    , "env":
+      [ "Any override to the default environment which sets only"
+      , "PATH and SOURCE_DATE_EPOCH"
+      ]
+    }
+  , "implicit": {"runner": ["latex_runner.sh"]}
+  , "imports": {"singleton": ["./", "..", "stage_singleton_field"]}
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "stage"
+        , { "type": "join"
+          , "separator": "/"
+          , "$1": {"type": "FIELD", "name": "stage"}
+          }
+        ]
+      , [ "srcs"
+        , { "type": "disjoint_map_union"
+          , "msg": "Sources may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "srcs"}
+            , "body":
+              { "type": "map_union"
+              , "$1":
+                [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+                , { "type": "DEP_ARTIFACTS"
+                  , "dep": {"type": "var", "name": "x"}
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      , [ "main"
+        , { "type": "assert_non_empty"
+          , "msg": "Entry-point main cannot be empty"
+          , "$1": {"type": "join", "$1": {"type": "FIELD", "name": "main"}}
+          }
+        ]
+      , [ "_"
+        , { "type": "if"
+          , "cond":
+            { "type": "=="
+            , "$1":
+              { "type": "lookup"
+              , "map": {"type": "var", "name": "srcs"}
+              , "key":
+                { "type": "join"
+                , "$1": [{"type": "var", "name": "main"}, ".tex"]
+                }
+              }
+            , "$2": null
+            }
+          , "then":
+            { "type": "fail"
+            , "msg":
+              [ "main not the base name of a .tex file in srcs"
+              , "main has value"
+              , {"type": "var", "name": "main"}
+              , "srcs have file names"
+              , {"type": "keys", "$1": {"type": "var", "name": "srcs"}}
+              ]
+            }
+          }
+        ]
+      , [ "main"
+        , { "type": "if"
+          , "cond":
+            {"type": "==", "$1": {"type": "var", "name": "stage"}, "$2": ""}
+          , "then": {"type": "var", "name": "main"}
+          , "else":
+            { "type": "join"
+            , "separator": "/"
+            , "$1":
+              [ {"type": "var", "name": "stage"}
+              , {"type": "var", "name": "main"}
+              ]
+            }
+          }
+        ]
+      , [ "srcs"
+        , { "type": "to_subdir"
+          , "subdir": {"type": "var", "name": "stage"}
+          , "$1": {"type": "var", "name": "srcs"}
+          }
+        ]
+      , [ "deps"
+        , { "type": "disjoint_map_union"
+          , "msg": "Dependencies may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "deps"}
+            , "body":
+              {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+            }
+          }
+        ]
+      , [ "tex inputs"
+        , { "type": "to_subdir"
+          , "subdir": "work"
+          , "$1":
+            { "type": "disjoint_map_union"
+            , "msg": "Staging conflict between staged sources and deps"
+            , "$1":
+              [ {"type": "var", "name": "deps"}
+              , {"type": "var", "name": "srcs"}
+              ]
+            }
+          }
+        ]
+      , [ "env"
+        , { "type": "map_union"
+          , "$1":
+            [ { "type": "singleton_map"
+              , "key": "PATH"
+              , "value": "/bin:/usr/bin:/usr/local/bin"
+              }
+            , { "type": "singleton_map"
+              , "key": "SOURCE_DATE_EPOCH"
+              , "value": "0"
+              }
+            , {"type": "var", "name": "env", "default": {"type": "empty_map"}}
+            ]
+          }
+        ]
+      , [ "runner"
+        , { "type": "let*"
+          , "bindings": [["fieldname", "runner"], ["location", "runner"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "singleton"}
+          }
+        ]
+      , [ "cmd"
+        , [ "./runner"
+          , {"type": "var", "name": "latex", "default": "pdflatex"}
+          , {"type": "var", "name": "main"}
+          ]
+        ]
+      , [ "pdf"
+        , { "type": "ACTION"
+          , "inputs":
+            { "type": "map_union"
+            , "$1":
+              [ {"type": "var", "name": "tex inputs"}
+              , {"type": "var", "name": "runner"}
+              ]
+            }
+          , "outs":
+            [ { "type": "join"
+              , "$1": ["work/", {"type": "var", "name": "main"}, ".pdf"]
+              }
+            ]
+          , "cmd": {"type": "var", "name": "cmd"}
+          , "env": {"type": "var", "name": "env"}
+          }
+        ]
+      , [ "pdf"
+        , { "type": "map_union"
+          , "$1":
+            { "type": "foreach_map"
+            , "var_key": "name"
+            , "var_val": "file"
+            , "range": {"type": "var", "name": "pdf"}
+            , "body":
+              { "type": "singleton_map"
+              , "key":
+                {"type": "basename", "$1": {"type": "var", "name": "name"}}
+              , "value": {"type": "var", "name": "file"}
+              }
+            }
+          }
+        ]
+      ]
+    , "body":
+      { "type": "RESULT"
+      , "artifacts": {"type": "var", "name": "pdf"}
+      , "runfiles": {"type": "var", "name": "pdf"}
+      }
+    }
+  }
+, "verbatim":
+  { "doc": ["Add \\begin{verbatim}...\\end{verbatim} around files"]
+  , "target_fields": ["srcs"]
+  , "string_fields": ["prefix", "stage"]
+  , "field_doc":
+    { "srcs":
+      [ "The files to transform to tex files containing them verbatim."
+      , "In the output file, the ending is changed to .tex"
+      ]
+    , "prefix": ["Additional prefix to add to the output file name"]
+    , "stage": ["The logical directory to stage the outputs to"]
+    }
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "srcs"
+        , { "type": "disjoint_map_union"
+          , "msg": "Source files must not overlap, as this would lead to overlapping output"
+          , "$1":
+            { "type": "foreach"
+            , "var": "src"
+            , "range": {"type": "FIELD", "name": "srcs"}
+            , "body":
+              {"type": "DEP_ARTIFACTS", "dep": {"type": "var", "name": "src"}}
+            }
+          }
+        ]
+      , [ "verbatim files"
+        , { "type": "disjoint_map_union"
+          , "msg":
+            [ "Outputfiles must not overlap"
+            , "Input file names:"
+            , {"type": "keys", "map": {"type": "var", "name": "srcs"}}
+            ]
+          , "$1":
+            { "type": "foreach_map"
+            , "var_key": "src"
+            , "var_val": "input"
+            , "range": {"type": "var", "name": "srcs"}
+            , "body":
+              { "type": "let*"
+              , "bindings":
+                [ [ "action out"
+                  , { "type": "ACTION"
+                    , "inputs":
+                      { "type": "singleton_map"
+                      , "key": "in"
+                      , "value": {"type": "var", "name": "input"}
+                      }
+                    , "outs": ["out"]
+                    , "cmd":
+                      [ "sh"
+                      , "-c"
+                      , "echo '\\\\begin{verbatim}' > out && cat in >> out && echo '\\\\end{verbatim}' >> out"
+                      ]
+                    }
+                  ]
+                , [ "out"
+                  , { "type": "lookup"
+                    , "map": {"type": "var", "name": "action out"}
+                    , "key": "out"
+                    }
+                  ]
+                , [ "out name"
+                  , { "type": "join"
+                    , "$1":
+                      [ { "type": "join"
+                        , "$1": {"type": "FIELD", "name": "prefix"}
+                        }
+                      , { "type": "change_ending"
+                        , "ending": ".tex"
+                        , "$1": {"type": "var", "name": "src"}
+                        }
+                      ]
+                    }
+                  ]
+                ]
+              , "body":
+                { "type": "singleton_map"
+                , "key": {"type": "var", "name": "out name"}
+                , "value": {"type": "var", "name": "out"}
+                }
+              }
+            }
+          }
+        ]
+      , [ "stage"
+        , { "type": "join"
+          , "separator": "/"
+          , "$1": {"type": "FIELD", "name": "stage"}
+          }
+        ]
+      , [ "staged verbatim files"
+        , { "type": "to_subdir"
+          , "subdir": {"type": "var", "name": "stage"}
+          , "$1": {"type": "var", "name": "verbatim files"}
+          }
+        ]
+      ]
+    , "body":
+      { "type": "RESULT"
+      , "artifacts": {"type": "var", "name": "staged verbatim files"}
+      , "runfiles": {"type": "var", "name": "staged verbatim files"}
+      }
+    }
+  }
+}
diff --git a/latex/TARGETS b/latex/TARGETS
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/latex/TARGETS
@@ -0,0 +1 @@
+{}
diff --git a/latex/latex_runner.sh b/latex/latex_runner.sh
new file mode 100755
index 0000000..69f63cd
--- /dev/null
+++ b/latex/latex_runner.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+PDFLATEX=$1
+shift
+MAIN=$1
+shift
+
+cd work
+echo First latex run >> ../log
+$PDFLATEX $MAIN >> ../log 2>&1 || { cat ../log ; exit 1; }
+echo Second latex run >> ../log
+$PDFLATEX $MAIN >> ../log 2>&1 || { cat ../log ; exit 1; }
+echo Third latex run >> ../log
+$PDFLATEX $MAIN >> ../log 2>&1 || { cat ../log ; exit 1; }
+[ -f $MAIN.pdf ] \
+    || ( [ -f $(basename $MAIN).pdf ] && cp $(basename $MAIN).pdf $MAIN.pdf ) \
+    || { cat ../log ; exit 1; }
diff --git a/pandoc/RULES b/pandoc/RULES
new file mode 100644
index 0000000..7ce5433
--- /dev/null
+++ b/pandoc/RULES
@@ -0,0 +1,404 @@
+{ "template":
+  { "doc": ["Create a pandoc template with arguments"]
+  , "string_fields": ["name", "args"]
+  , "target_fields": ["data", "lua filters"]
+  , "field_doc":
+    { "name": ["Name of the template to use"]
+    , "args": ["Additional pandoc arguments"]
+    , "data": ["Template data files"]
+    , "lua filters": ["Files that should be used as lua filters"]
+    }
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "data"
+        , { "type": "disjoint_map_union"
+          , "msg": "Data files may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "data"}
+            , "body":
+              { "type": "map_union"
+              , "$1":
+                [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+                , { "type": "DEP_ARTIFACTS"
+                  , "dep": {"type": "var", "name": "x"}
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      , [ "lua filters"
+        , { "type": "disjoint_map_union"
+          , "msg": "Lua filters may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "lua filters"}
+            , "body":
+              { "type": "map_union"
+              , "$1":
+                [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+                , { "type": "DEP_ARTIFACTS"
+                  , "dep": {"type": "var", "name": "x"}
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      ]
+    , "body":
+      { "type": "RESULT"
+      , "artifacts": {"type": "var", "name": "data"}
+      , "runfiles": {"type": "var", "name": "data"}
+      , "provides":
+        { "type": "map_union"
+        , "$1":
+          [ { "type": "singleton_map"
+            , "key": "template-name"
+            , "value":
+              {"type": "join", "$1": {"type": "FIELD", "name": "name"}}
+            }
+          , { "type": "singleton_map"
+            , "key": "template-args"
+            , "value": {"type": "FIELD", "name": "args"}
+            }
+          , { "type": "singleton_map"
+            , "key": "lua filters"
+            , "value": {"type": "var", "name": "lua filters"}
+            }
+          ]
+        }
+      }
+    }
+  }
+, "metadata":
+  { "doc":
+    ["Generate a file with meta data from data provided through context"]
+  , "config_vars": ["SOURCE_DATE_EPOCH", "DATE_FORMAT"]
+  , "config_doc":
+    { "SOURCE_DATE_EPOCH":
+      [ "The timestamp to include (in seconds since Jan 1, 1970 00:00 UTC);"
+      , "ignored if unset or value is 0."
+      ]
+    , "DATE_FORMAT":
+      ["The format to use for time stamps (defaults to \"%Y-%m-%d %H:%M\")."]
+    }
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "script"
+        , { "type": "join"
+          , "separator": "\n"
+          , "$1":
+            { "type": "++"
+            , "$1":
+              [ ["echo", "echo ---"]
+              , { "type": "if"
+                , "cond": {"type": "var", "name": "SOURCE_DATE_EPOCH"}
+                , "then":
+                  [ { "type": "join_cmd"
+                    , "$1":
+                      [ "date"
+                      , "-d"
+                      , { "type": "join"
+                        , "$1":
+                          [ "@"
+                          , { "type": "json_encode"
+                            , "$1":
+                              {"type": "var", "name": "SOURCE_DATE_EPOCH"}
+                            }
+                          ]
+                        }
+                      , { "type": "join"
+                        , "$1":
+                          [ "+date: \""
+                          , { "type": "var"
+                            , "name": "DATE_FORMAT"
+                            , "default": "%Y-%m-%d %H:%M"
+                            }
+                          , "\""
+                          ]
+                        }
+                      ]
+                    }
+                  ]
+                }
+              , ["echo ---", "echo\n"]
+              ]
+            }
+          }
+        ]
+      , [ "data"
+        , { "type": "ACTION"
+          , "cmd": ["sh", "-c", "sh ./generate > metadata.yaml"]
+          , "outs": ["metadata.yaml"]
+          , "inputs":
+            { "type": "singleton_map"
+            , "key": "generate"
+            , "value":
+              {"type": "BLOB", "data": {"type": "var", "name": "script"}}
+            }
+          }
+        ]
+      ]
+    , "body": {"type": "RESULT", "artifacts": {"type": "var", "name": "data"}}
+    }
+  }
+, "standalone":
+  { "doc": ["Create a standalone document from the given inputs"]
+  , "target_fields": ["srcs", "template"]
+  , "string_fields": ["out", "meta data"]
+  , "field_doc":
+    { "srcs":
+      [ "The files to build the document from, in order."
+      , "Honors the order within a [\"files\", \"ordered\"] target."
+      ]
+    , "out":
+      ["The name of the output file.", "Must not conflict with input files."]
+    , "template": ["The template definition to use"]
+    , "meta data":
+      [ "Additional meta data to be set. Each entry has to have the"
+      , "form \"key=value\"."
+      ]
+    }
+  , "config_vars": ["env"]
+  , "config_doc":
+    { "env":
+      [ "Any override to the default environment which sets only"
+      , "PATH, SOURCE_DATE_EPOCH, and TEXINPUTS"
+      ]
+    }
+  , "implicit": {"metadata": [["./", ".", "metadata"]]}
+  , "imports":
+    { "src names": ["./", "../files", "order"]
+    , "stage": ["./", "..", "stage_singleton_field"]
+    }
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "out"
+        , { "type": "assert_non_empty"
+          , "msg": "A valid output name has to be provided"
+          , "$1": {"type": "join", "$1": {"type": "FIELD", "name": "out"}}
+          }
+        ]
+      , [ "srcs"
+        , { "type": "disjoint_map_union"
+          , "msg": "Sources may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "srcs"}
+            , "body":
+              { "type": "map_union"
+              , "$1":
+                [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+                , { "type": "DEP_ARTIFACTS"
+                  , "dep": {"type": "var", "name": "x"}
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      , [ "srcs"
+        , { "type": "to_subdir"
+          , "subdir": "srcs"
+          , "$1": {"type": "var", "name": "srcs"}
+          }
+        ]
+      , [ "data"
+        , { "type": "disjoint_map_union"
+          , "msg": "Data files may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "template"}
+            , "body":
+              { "type": "map_union"
+              , "$1":
+                [ {"type": "DEP_RUNFILES", "dep": {"type": "var", "name": "x"}}
+                , { "type": "DEP_ARTIFACTS"
+                  , "dep": {"type": "var", "name": "x"}
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      , [ "data"
+        , { "type": "to_subdir"
+          , "subdir": "data"
+          , "$1": {"type": "var", "name": "data"}
+          }
+        ]
+      , [ "lua filters"
+        , { "type": "disjoint_map_union"
+          , "msg": "Lua filters may not conflict"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "template"}
+            , "body":
+              { "type": "DEP_PROVIDES"
+              , "provider": "lua filters"
+              , "dep": {"type": "var", "name": "x"}
+              }
+            }
+          }
+        ]
+      , [ "lua filters"
+        , { "type": "to_subdir"
+          , "subdir": "lua"
+          , "$1": {"type": "var", "name": "lua filters"}
+          }
+        ]
+      , [ "template-name"
+        , { "type": "join"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "template"}
+            , "body":
+              { "type": "DEP_PROVIDES"
+              , "dep": {"type": "var", "name": "x"}
+              , "provider": "template-name"
+              , "default": "default"
+              }
+            }
+          }
+        ]
+      , [ "template-args"
+        , { "type": "++"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "template"}
+            , "body":
+              { "type": "DEP_PROVIDES"
+              , "dep": {"type": "var", "name": "x"}
+              , "provider": "template-args"
+              }
+            }
+          }
+        ]
+      , [ "_"
+        , { "type": "if"
+          , "cond":
+            { "type": "lookup"
+            , "map": {"type": "var", "name": "srcs"}
+            , "key": {"type": "var", "name": "out"}
+            }
+          , "then":
+            { "type": "fail"
+            , "msg":
+              [ "Output must be disjoint from inputs."
+              , "Output file name is"
+              , {"type": "var", "name": "out"}
+              , "input files are"
+              , {"type": "keys", "$1": {"type": "var", "name": "srcs"}}
+              ]
+            }
+          }
+        ]
+      , ["src names", {"type": "CALL_EXPRESSION", "name": "src names"}]
+      , [ "src names"
+        , { "type": "foreach"
+          , "var": "name"
+          , "range": {"type": "var", "name": "src names"}
+          , "body":
+            {"type": "join", "$1": ["srcs/", {"type": "var", "name": "name"}]}
+          }
+        ]
+      , [ "meta data args"
+        , { "type": "++"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range": {"type": "FIELD", "name": "meta data"}
+            , "body": ["-M", {"type": "var", "name": "x"}]
+            }
+          }
+        ]
+      , [ "filter args"
+        , { "type": "++"
+          , "$1":
+            { "type": "foreach"
+            , "var": "x"
+            , "range":
+              {"type": "keys", "$1": {"type": "var", "name": "lua filters"}}
+            , "body": ["--lua-filter", {"type": "var", "name": "x"}]
+            }
+          }
+        ]
+      , [ "env"
+        , { "type": "map_union"
+          , "$1":
+            [ { "type": "singleton_map"
+              , "key": "PATH"
+              , "value": "/bin:/usr/bin:/usr/local/bin"
+              }
+            , { "type": "singleton_map"
+              , "key": "SOURCE_DATE_EPOCH"
+              , "value": "0"
+              }
+            , {"type": "singleton_map", "key": "TEXINPUTS", "value": "data:"}
+            , {"type": "var", "name": "env", "default": {"type": "empty_map"}}
+            ]
+          }
+        ]
+      , [ "metadata"
+        , { "type": "let*"
+          , "bindings":
+            [["fieldname", "metadata"], ["location", "metadata.yaml"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "stage"}
+          }
+        ]
+      , [ "generated"
+        , { "type": "ACTION"
+          , "inputs":
+            { "type": "map_union"
+            , "$1":
+              [ {"type": "var", "name": "srcs"}
+              , {"type": "var", "name": "data"}
+              , {"type": "var", "name": "lua filters"}
+              , {"type": "var", "name": "metadata"}
+              ]
+            }
+          , "outs": [{"type": "var", "name": "out"}]
+          , "env": {"type": "var", "name": "env"}
+          , "cmd":
+            { "type": "++"
+            , "$1":
+              [ [ "pandoc"
+                , "--data-dir=./data"
+                , "--resource-path=./data"
+                , "-o"
+                , {"type": "var", "name": "out"}
+                , "-s"
+                , "-N"
+                ]
+              , { "type": "if"
+                , "cond": {"type": "var", "name": "template-name"}
+                , "then":
+                  ["--template", {"type": "var", "name": "template-name"}]
+                }
+              , ["--metadata-file", "metadata.yaml"]
+              , {"type": "var", "name": "template-args"}
+              , {"type": "var", "name": "filter args"}
+              , {"type": "var", "name": "meta data args"}
+              , {"type": "var", "name": "src names"}
+              ]
+            }
+          }
+        ]
+      ]
+    , "body":
+      {"type": "RESULT", "artifacts": {"type": "var", "name": "generated"}}
+    }
+  }
+}
diff --git a/pandoc/TARGETS b/pandoc/TARGETS
new file mode 100644
index 0000000..addf37a
--- /dev/null
+++ b/pandoc/TARGETS
@@ -0,0 +1 @@
+{"metadata": {"type": "metadata"}}
diff --git a/ps/RULES b/ps/RULES
new file mode 100644
index 0000000..6a4a184
--- /dev/null
+++ b/ps/RULES
@@ -0,0 +1,122 @@
+{ "family":
+  { "doc":
+    [ "From a single eps file, create many,"
+    , "with /stage set to different values."
+    ]
+  , "target_fields": ["src"]
+  , "string_fields": ["stages", "stage", "drawbb", "name"]
+  , "field_doc":
+    { "src": ["The single eps source file the variations are taken from"]
+    , "stages": ["The values of /stage for wich a file should be generated."]
+    , "drawbb": ["If non-empty, set drawbb to true, else to false"]
+    , "stage": ["The logical directory to stage the output to"]
+    , "name":
+      [ "The base name of the output files"
+      , "The stage name will be appended, separated by \"_\", and the ending \".eps\" will be added"
+      ]
+    }
+  , "imports": {"stage_field": ["./", "..", "stage_singleton_field"]}
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "stage"
+        , { "type": "join"
+          , "separator": "/"
+          , "$1": {"type": "FIELD", "name": "stage"}
+          }
+        ]
+      , ["name", {"type": "join", "$1": {"type": "FIELD", "name": "name"}}]
+      , [ "drawbb"
+        , { "type": "if"
+          , "cond": {"type": "FIELD", "name": "drawbb"}
+          , "then": "true"
+          , "else": "false"
+          }
+        ]
+      , [ "src.eps"
+        , { "type": "let*"
+          , "bindings": [["fieldname", "src"], ["location", "src.eps"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "stage_field"}
+          }
+        ]
+      , [ "outputs"
+        , { "type": "map_union"
+          , "$1":
+            { "type": "foreach"
+            , "range": {"type": "FIELD", "name": "stages"}
+            , "var": "n"
+            , "body":
+              { "type": "let*"
+              , "bindings":
+                [ [ "script.ed"
+                  , { "type": "singleton_map"
+                    , "key": "script.ed"
+                    , "value":
+                      { "type": "BLOB"
+                      , "data":
+                        { "type": "join"
+                        , "$1":
+                          [ "1\n/\\/stage.*bind def\nd\na\n/stage { "
+                          , {"type": "var", "name": "n"}
+                          , " } bind def\n.\n1\n/\\/drawbb.*bind def\nd\na\n/drawbb { "
+                          , {"type": "var", "name": "drawbb"}
+                          , " } bind def\n.\nw\nq\n"
+                          ]
+                        }
+                      }
+                    }
+                  ]
+                , [ "out.eps"
+                  , { "type": "ACTION"
+                    , "inputs":
+                      { "type": "map_union"
+                      , "$1":
+                        [ {"type": "var", "name": "src.eps"}
+                        , {"type": "var", "name": "script.ed"}
+                        ]
+                      }
+                    , "outs": ["out.eps"]
+                    , "cmd":
+                      [ "sh"
+                      , "-c"
+                      , "cp src.eps out.eps && chmod 644 out.eps && { ed out.eps < script.ed > log 2>&1 || { cat log ; exit 1; } }"
+                      ]
+                    }
+                  ]
+                ]
+              , "body":
+                { "type": "singleton_map"
+                , "key":
+                  { "type": "join"
+                  , "$1":
+                    [ {"type": "var", "name": "name"}
+                    , "_"
+                    , {"type": "var", "name": "n"}
+                    , ".eps"
+                    ]
+                  }
+                , "value":
+                  { "type": "lookup"
+                  , "map": {"type": "var", "name": "out.eps"}
+                  , "key": "out.eps"
+                  }
+                }
+              }
+            }
+          }
+        ]
+      , [ "staged outputs"
+        , { "type": "to_subdir"
+          , "subdir": {"type": "var", "name": "stage"}
+          , "$1": {"type": "var", "name": "outputs"}
+          }
+        ]
+      ]
+    , "body":
+      { "type": "RESULT"
+      , "artifacts": {"type": "var", "name": "staged outputs"}
+      , "runfiles": {"type": "var", "name": "staged outputs"}
+      }
+    }
+  }
+}