* gnu/packages/patches/ocaml-enable-ocamldoc-reproducibility.patch: New file. * gnu/packages/ocaml.scm (ocaml)[origin]: Use it. * gnu/local.mk (dist_patch_DATA): Add it.
		
			
				
	
	
		
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			149 lines
		
	
	
	
		
			5.5 KiB
		
	
	
	
		
			Diff
		
	
	
	
	
	
From a87c3f20e846c00e53d695497dba7038edbd12f0 Mon Sep 17 00:00:00 2001
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From: Valentin Lorentz <progval@progval.net>
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Date: Thu, 13 Aug 2015 11:59:04 +0200
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Subject: [PATCH] Enable ocamldoc to build reproducible manpages
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Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=794586
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Signed-off-by: Stephane Glondu <steph@glondu.net>
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---
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 ocamldoc/odoc_man.ml   | 15 +++++----------
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 ocamldoc/odoc_misc.ml  | 12 ++++++++++--
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 ocamldoc/odoc_misc.mli |  7 ++++++-
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 3 files changed, 21 insertions(+), 13 deletions(-)
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diff --git a/ocamldoc/odoc_man.ml b/ocamldoc/odoc_man.ml
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index 615c5e172..3c85aa32a 100644
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--- a/ocamldoc/odoc_man.ml
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+++ b/ocamldoc/odoc_man.ml
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@@ -864,14 +864,13 @@ class man =
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     (** Generate the man page for the given class.*)
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     method generate_for_class cl =
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       Odoc_info.reset_type_names () ;
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-      let date = Unix.time () in
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       let file = self#file_name cl.cl_name in
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       try
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         let chanout = self#open_out file in
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         let b = new_buf () in
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         bs b (".TH \""^cl.cl_name^"\" ");
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         bs b !man_section ;
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-        bs b (" "^(Odoc_misc.string_of_date ~hour: false date)^" ");
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+        bs b (" source: "^Odoc_misc.current_date^" ");
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         bs b "OCamldoc ";
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         bs b ("\""^(match !Global.title with Some t -> t | None -> "")^"\"\n");
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@@ -923,14 +922,13 @@ class man =
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     (** Generate the man page for the given class type.*)
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     method generate_for_class_type ct =
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       Odoc_info.reset_type_names () ;
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-      let date = Unix.time () in
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       let file = self#file_name ct.clt_name in
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       try
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         let chanout = self#open_out file in
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         let b = new_buf () in
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         bs b (".TH \""^ct.clt_name^"\" ");
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         bs b !man_section ;
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-        bs b (" "^(Odoc_misc.string_of_date ~hour: false date)^" ");
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+        bs b (" source: "^Odoc_misc.current_date^" ");
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         bs b "OCamldoc ";
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         bs b ("\""^(match !Global.title with Some t -> t | None -> "")^"\"\n");
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@@ -1016,14 +1014,13 @@ class man =
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     (** Generate the man file for the given module type.
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        @raise Failure if an error occurs.*)
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     method generate_for_module_type mt =
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-      let date = Unix.time () in
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       let file = self#file_name mt.mt_name in
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       try
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         let chanout = self#open_out file in
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         let b = new_buf () in
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         bs b (".TH \""^mt.mt_name^"\" ");
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         bs b !man_section ;
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-        bs b (" "^(Odoc_misc.string_of_date ~hour: false date)^" ");
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+        bs b (" source: "^Odoc_misc.current_date^" ");
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         bs b "OCamldoc ";
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         bs b ("\""^(match !Global.title with Some t -> t | None -> "")^"\"\n");
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@@ -1099,14 +1096,13 @@ class man =
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     (** Generate the man file for the given module.
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        @raise Failure if an error occurs.*)
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     method generate_for_module m =
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-      let date = Unix.time () in
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       let file = self#file_name m.m_name in
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       try
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         let chanout = self#open_out file in
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         let b = new_buf () in
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         bs b (".TH \""^m.m_name^"\" ");
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         bs b !man_section ;
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-        bs b (" "^(Odoc_misc.string_of_date ~hour: false date)^" ");
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+        bs b (" source: "^Odoc_misc.current_date^" ");
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         bs b "OCamldoc ";
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         bs b ("\""^(match !Global.title with Some t -> t | None -> "")^"\"\n");
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@@ -1206,14 +1202,13 @@ class man =
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           | Res_const (_,f) -> f.vc_name
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          )
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      in
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-     let date = Unix.time () in
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       let file = self#file_name name in
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       try
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         let chanout = self#open_out file in
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         let b = new_buf () in
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         bs b (".TH \""^name^"\" ");
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         bs b !man_section ;
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-        bs b (" "^(Odoc_misc.string_of_date ~hour: false date)^" ");
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+        bs b (" source: "^Odoc_misc.current_date^" ");
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         bs b "OCamldoc ";
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         bs b ("\""^(match !Global.title with Some t -> t | None -> "")^"\"\n");
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         bs b ".SH NAME\n";
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diff --git a/ocamldoc/odoc_misc.ml b/ocamldoc/odoc_misc.ml
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index 4c74476da..456225f62 100644
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--- a/ocamldoc/odoc_misc.ml
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+++ b/ocamldoc/odoc_misc.ml
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@@ -223,9 +223,9 @@ let apply_opt f v_opt =
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     None -> None
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   | Some v -> Some (f v)
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-let string_of_date ?(hour=true) d =
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+let string_of_date ?(absolute=false) ?(hour=true) d =
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   let add_0 s = if String.length s < 2 then "0"^s else s in
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-  let t = Unix.localtime d in
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+  let t = (if absolute then Unix.gmtime else Unix.localtime) d in
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   (string_of_int (t.Unix.tm_year + 1900))^"-"^
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   (add_0 (string_of_int (t.Unix.tm_mon + 1)))^"-"^
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   (add_0 (string_of_int t.Unix.tm_mday))^
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@@ -238,6 +238,14 @@ let string_of_date ?(hour=true) d =
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      ""
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   )
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+let current_date =
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+  let time =
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+    try
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+      float_of_string (Sys.getenv "SOURCE_DATE_EPOCH")
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+    with
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+      Not_found -> Unix.time ()
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+  in string_of_date ~absolute: true ~hour: false time
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+
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 let rec text_list_concat sep l =
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   match l with
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diff --git a/ocamldoc/odoc_misc.mli b/ocamldoc/odoc_misc.mli
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index dd5a7fcb9..38ff0612b 100644
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--- a/ocamldoc/odoc_misc.mli
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+++ b/ocamldoc/odoc_misc.mli
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@@ -62,7 +62,12 @@ val apply_opt : ('a -> 'b) -> 'a option -> 'b option
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 (** Return a string representing a date given as a number of seconds
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    since 1970. The hour is optionnaly displayed. *)
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-val string_of_date : ?hour:bool -> float -> string
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+val string_of_date : ?absolute:bool -> ?hour:bool -> float -> string
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+
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+(* Value returned by string_of_date for current time.
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+ * Uses environment variable SOURCE_DATE_EPOCH if set; falls back to
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+ * current timestamp otherwise. *)
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+val current_date : string
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 (** Return the first sentence (until the first dot) of a text.
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    Don't stop in the middle of [Code], [Verbatim], [List], [Lnum],
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-- 
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2.17.1
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