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2009-05-17bisect: check ancestors without forking a "git rev-list" processLibravatar Christian Couder1-32/+22
We must save the pending commits that will be used during revision walking and unparse them after, because we want to leave a clean state for the next revision walking that will try to find the best bisection point. As we don't fork a process anymore to call "git rev-list", we need to remove the use of GIT_TRACE to check how "git rev-list" is called from the t6030 test that uses it. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-17bisect: rework some rev related functions to make them more reusableLibravatar Christian Couder1-11/+14
This patches changes the "bisect_rev_setup" and "bisect_common" functions to make it easier to reuse them in a later patch. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: make "git bisect" use new "--next-all" bisect-helper functionLibravatar Christian Couder1-1/+3
This patch replace the "--next-exit" option of "git bisect--helper" with a "--next-all" option that does merge base checking using the "check_good_are_ancestors_of_bad" function implemented in "bisect.c" in a former patch. The new "--next-all" option is then used in "git-bisect.sh" instead of the "--next-exit" option, and all the shell functions in "git-bisect.sh" that are now unused are removed. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: add "check_good_are_ancestors_of_bad" functionLibravatar Christian Couder1-0/+75
This is a port of the function with the same name that is in "git-bisect.sh". The new function is not used yet but will be in a later patch. We also implement an helper "check_ancestors" function that use "start_command" and "finish_command" to launch "git rev-list $good ^$bad". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: implement the "check_merge_bases" functionLibravatar Christian Couder1-0/+130
And all functions needed to make it work. This is a port from the shell function with the same name "git-bisect.sh". This function is not used yet but it will be used later. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: automatically sort sha1_array if needed when looking it upLibravatar Christian Couder1-2/+6
This makes sha1_array easier to use, so later patches will be simpler. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: make skipped array functions more genericLibravatar Christian Couder1-12/+12
So they can be used on the good array too. This is done by renaming many functions and some variables to remove "skip" in the name, and by adding a "struct sha1_array *array" argument where needed. While at it, make the second argument to "lookup_sha1_array" const. It becomes "const unsigned char *sha1". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: remove too much function nestingLibravatar Christian Couder1-10/+8
This patch moves some function calls into "bisect_next_exit" so that functions are nesting less. The call to "bisect_rev_setup" is moved from "bisect_common" into "bisect_next_exit" and the call to "read_bisect_refs" from "bisect_rev_setup" into "bisect_next_exit". While at it, "rev_argv" is moved into "bisect_rev_setup". This will make it easier and cleaner to implement checking merge bases. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: use new "struct argv_array" to prepare argv for "setup_revisions"Libravatar Christian Couder1-28/+29
Because we will use other instances of this struct. The "rev_argv_push" function is changed into 2 functions "argv_array_push" and "argv_array_push_sha1" that take a "struct argv_array *" as first argument. And these functions are used to simplify "bisect_rev_setup". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: store good revisions in a "sha1_array"Libravatar Christian Couder1-7/+19
This will make it easier to use good revisions for checking merge bases later. To simplify the code, a new "sha1_array_push" function is also introduced. And while at it we move the earlier part of the code to fill the argv that is passed to "setup_revisions", so that all this code is now completely after "read_bisect_refs". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: implement "rev_argv_push" to fill an argv with revsLibravatar Christian Couder1-8/+11
This patch is a minor clean up right now, but the new function will evolve and be used more later. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: use "sha1_array" to store skipped revisionsLibravatar Christian Couder1-10/+15
This patch creates a "struct sha1_array" to store skipped revisions, so that the same struct can be reused in a later patch for good revisions. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect--helper: remove "--next-vars" option as it is now uselessLibravatar Christian Couder1-15/+0
Because it has been replaced by "--next-exit". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect--helper: add "--next-exit" to output bisect resultsLibravatar Christian Couder1-0/+105
The goal of this patch is to port more shell code from the "bisect_next" function in "git-bisect.sh" to C code in "builtin-bisect--helper.c". So we port the code that interprets the bisection result and stops or continues (by checking out the next revision) the bisection process. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-10bisect: move common bisect functionality to "bisect_common"Libravatar Christian Couder1-9/+15
So we can easily reuse the code in a later patch. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-07rev-list: add "int bisect_show_flags" in "struct rev_list_info"Libravatar Christian Couder1-2/+2
This is a cleanup patch to make it easier to use the "show_bisect_vars" function and take advantage of the rev_list_info struct. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-07rev-list: remove last static vars used in "show_commit"Libravatar Christian Couder1-1/+5
This patch removes the last static variables that were used in the "show_commit" function. To do that, we create a new "rev_list_info" struct that we will pass in the "void *data" argument to "show_commit". This means that we have to change the first argument to "show_bisect_vars" too. While at it, we also remove a "struct commit_list *list" variable in "cmd_rev_list" that is not really needed. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-05bisect--helper: string output variables together with "&&"Libravatar Christian Couder1-1/+2
When doing: eval "git bisect--helper --next-vars" | { while read line do echo "$line &&" done echo ':' } the result code comes from the last "echo ':'", not from running "git bisect--helper --next-vars". This patch gets rid of the need to string together the line from the output of "git bisect--helper" with "&&" in the calling script by making "git bisect--helper --next-vars" return output variables already in that format. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-05rev-list: pass "int flags" as last argument of "show_bisect_vars"Libravatar Christian Couder1-1/+1
Instead of "int show_all, int show_tried" we now only pass "int flags", because we will add one more flag in a later patch. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-05bisect: implement "read_bisect_paths" to read paths in "$GIT_DIR/BISECT_NAMES"Libravatar Christian Couder1-9/+46
This is needed because "git bisect--helper" must read bisect paths in "$GIT_DIR/BISECT_NAMES", so that a bisection can be performed only on commits that touches paths in this file. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-05bisect--helper: implement "git bisect--helper"Libravatar Christian Couder1-0/+68
This patch implements a new "git bisect--helper" builtin plumbing command that will be used to migrate "git-bisect.sh" to C. We start by implementing only the "--next-vars" option that will read bisect refs from "refs/bisect/", and then compute the next bisect step, and output shell variables ready to be eval'ed by the shell. At this step, "git bisect--helper" ignores the paths that may have been put in "$GIT_DIR/BISECT_NAMES". This will be fixed in a later patch. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-05bisect: use the new generic "sha1_pos" function to lookup sha1Libravatar Christian Couder1-14/+9
instead of the specific one that was simpler but less efficient. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-05rev-list: call new "filter_skip" functionLibravatar Christian Couder1-0/+63
This patch implements a new "filter_skip" function in C in "bisect.c" that will later replace the existing implementation in shell in "git-bisect.sh". An array is used to store the skipped commits. But the array is not yet fed anything. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-03-30rev-list: move bisect related code into its own fileLibravatar Christian Couder1-0/+388
This patch creates new "bisect.c" and "bisect.h" files and move bisect related code into these files. While at it, we also remove some include directives that are not needed any more from the beginning of "builtin-rev-list.c". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>