From 988fd0eec5d88bf6534fb1f645777350c20d4723 Mon Sep 17 00:00:00 2001 From: Boris Kolpackov Date: Sat, 30 Jul 2016 11:41:48 +0200 Subject: Actualize project root directories This solves the problem of changing path spelling on platforms with case- insensitive filesystems. For example, you may build a project in the current working directory without specifying any paths. This means the current working directory will be used as the project's root. On Windows this could be C:\x. Now you are building another project that imports the above project and you specify config.import.x variable pointing to the above build. But you are lazy to type capital C so you spell it as config.import.x=c:\x. What happens now is the value from config.import.x is used as the project root. And now it is a different spelling compared to your original build. This is not a problem when the build system itself is concerned -- it is smart enough to use case-insensitive comparison. However, we often use roots to derive other things, say, -I options that we pass to compilers. And these options are normally no longer treated as (case-insensitive) paths. If they are hashed and the result stored in depdb, then we end up with rebuilds that are triggered by changes from C:\ to c:\. --- build2/b.cxx | 12 ++++++++---- build2/file | 16 +++++++++------- build2/file.cxx | 6 +++--- build2/types | 2 ++ build2/variable.cxx | 2 +- 5 files changed, 23 insertions(+), 15 deletions(-) diff --git a/build2/b.cxx b/build2/b.cxx index b2ba2c1..4efbdd2 100644 --- a/build2/b.cxx +++ b/build2/b.cxx @@ -358,7 +358,9 @@ main (int argc, char* argv[]) if (out_base.relative ()) out_base = work / out_base; - out_base.normalize (); + // This directory came from the command line so actualize it. + // + out_base.normalize (true); // The order in which we determine the roots depends on whether // src_base was specified explicitly. There will also be a few @@ -384,7 +386,9 @@ main (int argc, char* argv[]) if (src_base.relative ()) src_base = work / src_base; - src_base.normalize (); + // Also came from the command line, so actualize. + // + src_base.normalize (true); // If the src_base was explicitly specified, search for src_root. // @@ -427,7 +431,7 @@ main (int argc, char* argv[]) // if (out_root.empty ()) { - src_root = find_src_root (work); + src_root = find_src_root (work); // Work is actualized. if (!src_root.empty ()) { @@ -512,7 +516,7 @@ main (int argc, char* argv[]) // If not, then assume we are running from src_base // and calculate src_root based on out_root/out_base. // - src_base = work; + src_base = work; // Work is actualized. src_root = src_base.directory (out_base.leaf (out_root)); guessing = true; } diff --git a/build2/file b/build2/file index 00ece85..062487a 100644 --- a/build2/file +++ b/build2/file @@ -34,17 +34,19 @@ namespace build2 bool is_out_root (const dir_path&); - // Given an src_base directory, look for a project's src_root - // based on the presence of known special files. Return empty - // path if not found. + // Given an src_base directory, look for a project's src_root based on the + // presence of known special files. Return empty path if not found. Note + // that if the input is normalized/actualized, then the output will be as + // well. // dir_path find_src_root (const dir_path&); - // The same as above but for project's out. Note that we also - // check whether a directory happens to be src_root, in case - // this is an in-tree build. The second argument is the out - // flag that is set to true if this is src_root. + // The same as above but for project's out. Note that we also check whether + // a directory happens to be src_root, in case this is an in-tree build. The + // second argument is the out flag that is set to true if this is src_root. + // Note that if the input is normalized/actualized, then the output will be + // as well. // dir_path find_out_root (const dir_path&, bool* src = nullptr); diff --git a/build2/file.cxx b/build2/file.cxx index 155c8e6..a70c97a 100644 --- a/build2/file.cxx +++ b/build2/file.cxx @@ -664,7 +664,7 @@ namespace build2 const dir_path& d (cast (l)); dir_path out_root (root.out_path () / d); - out_root.normalize (); + out_root.normalize (); // No need to actualize (d is a bunch of ..) // src_root is a bit more complicated. Here we have three cases: // @@ -692,7 +692,7 @@ namespace build2 else // #1 { dir_path src_root (root.src_path () / d); - src_root.normalize (); + src_root.normalize (); // No need to actualize (as above). v = move (src_root); } } @@ -855,7 +855,7 @@ namespace build2 if (auto l = iroot[var]) { - out_root = cast (l); + out_root = cast (l); // Normalized and actualized. config::save_variable (iroot, var); // Mark as part of configuration. } else diff --git a/build2/types b/build2/types index 5409c60..8ccbd13 100644 --- a/build2/types +++ b/build2/types @@ -91,6 +91,8 @@ namespace build2 // a (variable) value of this type gets initialized from untyped names. See // value_type for details. // + // Note that currently we also normalize and actualize the path. + // struct abs_dir_path: dir_path { using dir_path::dir_path; diff --git a/build2/variable.cxx b/build2/variable.cxx index 2d4db86..eec0573 100644 --- a/build2/variable.cxx +++ b/build2/variable.cxx @@ -601,7 +601,7 @@ namespace build2 if (d.relative ()) d.complete (); - d.normalize (); + d.normalize (true); // Actualize. return abs_dir_path (move (d)); } -- cgit v1.1