Searches for versions that require a merge /optionally perform merge
Product | Command Type |
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ClearCase | cleartool subcommand |
ClearCase LT | cleartool subcommand |
Attache | command |
Platform |
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UNIX |
Windows |
ClearCase, ClearCase LT-Search for versions:
Attache-Search for versions:
For one or more versions, the findmerge command determines whether a merge is required from a specified version to the version in your view, then executes one or more actions:
Listing the versions that require a merge
Performing the required merges, checking out versions as necessary; in Attache, the merges are done locally
Performing an arbitrary command
It considers a set of versions, which you specify using syntax similar to that of the find command.
For each of these versions, findmerge examines the relationship between the version in your view and the version specified by the -ftag, -fversion, or -flatest option. It determines whether a merge is required from that other version to your view's version.
findmerge then performs the actions you specify with -print, -exec, and/or the various -merge variants. (In Attache, if merges are performed, the resulting merged files are left in your workspace.
(Attache) Local directories are not updated after a directory merge; the user must issue get commands to update merged directories.
Keep in mind that nontrivial merge capability is guaranteed to work only for versions whose type manager implements the merge or xmerge methods. See the type_manager reference page for more information.
To use findmerge with UCM activities, you specify one or more activities and the option -fcsets. (The activity-selector arguments must precede the -fcsets option.) Each version listed in a change set becomes the from-version in a merge operation. As always, the to-version is the one in your view.
(ClearCase and ClearCase LT) For other versions-for example, those of type file-the type manager may or may not be able to merge the data in the versions that findmerge identifies. For some versions, you may need to perform the merge manually, as follows:
Check out the version
Incorporate data from the version on another branch into your checked-out version, using a text editor or some other tool
Connect the appropriate versions with a merge arrow, using merge -ndata
(Attache) For some versions, namely, those not containing text, you need to perform the merge manually, as follows:
Check out the version
Incorporate data from the version on another branch into your checked-out version, using a text editor or some other tool
Connect the appropriate versions with a merge arrow, using merge -ndata
If you specify -print as the action (and you do not also specify any of the merge actions), findmerge does not actually perform any merges. Instead, it shows what merge activity would be required:
Needs Merge "proj.c" [to /main/41 from /main/v2_plus/6 base /main/v2_plus/3]
Log has been written to "findmerge.log.16-Nov-98.17:39:18"
.
.
.
In addition, it writes a set of shell commands to perform the required merges to a log file. In Attache, the log file is in the view:
cleartool findmerge proj.c@@\main\41 -fver \main\v2_plus\6 -log nul -merge -cqe
.
.
.
At some later point, you can execute the commands in the log file-all at once, or a few at a time. In Attache, the commands in the log file can be executed only on the helper host.
If the directory version from which you are merging contains new files or subdirectories, findmerge -print does not report on those files or directories until you merge the directory versions. Therefore, you may want to run findmerge twice: once to merge the directory versions, and again with the -print option to report which files need to be merged. You can then cancel the checkout of the directories if you do not want to save the directory merge.
Under some circumstances, findmerge -print does not detect all the required merges (that is, all the merges that findmerge -merge would perform). This occurs if one or more directory merges are required, but are not performed.
By default, findmerge merges a directory before determining merge requirements for the versions cataloged within the directory. Thus, if merging directory srcdir makes a newly created file version, patch.c, appear, findmerge proceeds to detect that patch.c itself also needs to be merged. But if the only specified action is -print, then findmerge can determine only that srcdir must be merged; it cannot determine that patch.c must also be merged.
This incomplete reporting also occurs in these situations:
You decline to merge a directory when prompted by the -okmerge or -okgmerge option.
You specify -depth, which causes the versions cataloged in a directory to be processed before the directory version itself.
You use -directory or -nrecurse to suppress processing of the versions cataloged in a directory.
You use -type f, which suppresses processing of directory versions.
You can use the following procedure to guarantee that the log file produced by findmerge -print includes all the required file-level merges within the directory tree under srcdir:
Actually perform all the directory-level merges:
cmd-context findmerge srcdir -type d -merge
Generate a log file containing the findmerge commands required for files within the merged directory hierarchy:
cmd-context findmerge srcdir -type f -print
In ClearCase and ClearCase LT, executing the log file produces results identical to entering the single command findmerge srcdir -merge.
The findmerge command uses one of two algorithms to locate and examine versions. When the number of versions to be examined is below a certain threshold (approximately 100), findmerge uses the algorithm that uses the VOB's metadata. When the number of versions exceeds the threshold, findmerge uses the algorithm that requires walking through the VOB's directory structure. The directory walkthrough method is slower than the metadata method.
If the specified action involves checking out and/or merging files, the restrictions for the checkout and merge commands apply.
SPECIFYING THE VERSIONS TO BE CONSIDERED. Default: None.
@
pname can be used to add the contents of the local file pname as pathname arguments. The pathname arguments can contain wildcards (see the wildcards reference page), and must be listed in the file one per line, or also be of the form @pname. Specifying a relative pathname for @pname begins from Attache's startup directory, not the working directory, so a full local pathname is recommended.SPECIFYING THE FROM-VERSION. Default: None. You must use one of these options to specify another version of each version, to be compared with the version in your view.
NARROWING THE LIST OF VERSIONS TO BE CONSIDERED. Use the following options to select a subset of the versions specified by pname arguments and the -all or -avobs option.
SPECIAL VERSION TREE GEOMETRY: MERGING FROM VERSION 0. If a merge is required from a version that happens to be version 0 on its branch, findmerge's default behavior is to perform the merge and issue a warning message:
Element "util.c" has empty branch [to \main\6 from \main\br1\0]
More often, findmerge determines that no merge is required from a zeroth version; it handles this case as any other no-merge-required case.
The following option overrides this default behavior.
SPECIAL VERSION TREE GEOMETRY: MERGE BACK-AND-OUT TO SUBBRANCH. findmerge flags this special case with a warning message:
Element "msg.c" requests merge to /main/12 backwards on same branch from /main/18
This situation arises in these cases:
You are merging from a parent branch to a subbranch.
For a particular version, no subbranch has been created yet.
Your config spec selects a version of that version using a -mkbranch config spec rule.
In this case, findmerge's default behavior is to perform the merge by checking out the version (which creates the subbranch at the to-version), then overwriting the checked-out version with the from-version.
The following option overrides this default behavior.
VERBOSITY OF MERGE ANALYSIS. By default, findmerge:
Silently skips versions that do not require a merge.
(If you use -all or -avobs in combination with -ftag) Issues a warning message if your config spec does not select any version of a version, but the config spec of the view specified with -ftag does. (For example, this occurs when a new version has been created in the from-view.)
The following options override this behavior.
LOGGING OF MERGE ANALYSIS. Default: A line is written to a merge log file (in Attache, in the working directory in the view) for each version that requires a merge. The log takes the form of a UNIX shell script or Windows batch file that can be used to perform, at a later time (in Attache, on the helper host), merges that are not completed automatically (see -print and -abort, for example). A number sign (#
) at the beginning of a line indicates that the required merge was performed successfully. The log file's name is generated by findmerge and displayed when the command completes.
NOTE: In Attache, the log file can be executed later, but the results may differ since copies of versions in the workspace are not taken into account. The commands can be cut and pasted from this log into the Attache command window, which will work correctly.
SPECIFYING CHECKOUT COMMENTS. Default: When findmerge checks out versions in order to perform merges, it prompts for a single checkout comment (-cq). You can override this behavior with your .clearcase_profile file. See the comments reference page. Edit comments with chevent.
AFFECTING TYPE OF CHECKOUT. Default: If the findmerge action performs a checkout, it is a reserved checkout.
MERGE OPTIONS. If you have findmerge actually perform merges, you can specify the following options, which work exactly as they do in the merge command. (In ClearCase and ClearCase LT, -abort and -qall are mutually exclusive.)
ACTIONS TO BE PERFORMED ON THE SELECTED VERSIONS. Default: None.
CLEARCASE_PN | Pathname of version |
CLEARCASE_XN_SFX | Extended naming symbol (default: @@) |
CLEARCASE_ID_STR | Version-ID of to-version |
CLEARCASE_XPN | Version-extended pathname of to-version |
CLEARCASE_F_ID_STR | Version-ID of from-version |
CLEARCASE_FXPN | Version-extended pathname of from-version |
CLEARCASE_B_ID_STR | Version-ID of base contributor version |
The UNIX examples in this section are written for use in csh. If you use another shell, you may need to use different quoting and escaping conventions.
The Windows examples that include wildcards or quoting are written for use in cleartool interactive mode. If you use cleartool single-command mode, you may need to change the wildcards and quoting to make your command interpreter process the command appropriately.
In cleartool single-command mode, cmd-context represents the UNIX shell or Windows command interpreter prompt, followed by the cleartool command. In cleartool interactive mode, cmd-context represents the interactive cleartool prompt. In Attache, cmd-context represents the workspace prompt.
(ClearCase and ClearCase LT) Compare a source file version in your current view to a version on another branch. Log the results of the comparison, but do not perform the merge. (If a merge is required, the log file stores a command that performs the merge.)
cmd-context findmerge msg.c -fversion /main/rel2_bugfix/LATEST -print
Needs Merge "msg.c" [to /main/2 from /main/rel2_bugfix/1 base /main/1]
A 'findmerge' log has been written to "findmerge.log.04-Feb-99.10:01:23"
cat findmerge.log.04-Feb-99.10:01:23
cleartool findmerge msg.c@@/main/2 -fver /main/rel2_bugfix/1 -log
/dev/null -merge
(Attache) Compare a source file version in your current workspace or view to a version on another branch. (If the file does not exist in your workspace, the version in your view is used.) Log the results of the comparison, but do not perform the merge. (If a merge is required, the log file on the helper host stores a command that performs the merge, but only from the helper host.)
cmd-context findmerge msg.c -fversion \main\rel2_bugfix\LATEST -print
Needs Merge "msg.c" [to \main\2 from \main\rel2_bugfix\1 base \main\1]
A 'findmerge' log has been written to "findmerge.log.04-Feb-99.10:01:23"
cmd-context shell type findmerge.log.04-Feb-99.10:01:23
cleartool findmerge msg.c@@/main/2 -fver /main/rel2_bugfix/1 -log
/dev/null -merge
(ClearCase and ClearCase LT) For the current directory subtree, compare all versions visible in the current view against the versions in another view. Print a list of versions that require merging, but do not perform the merge. For versions where no merge is required, explain why.
cmd-context findmerge . -ftag rel2_bugfix_view -whynot -print
No merge ".\Makefile" [\main\3 descended from \main\2]
No merge ".\cm_add.c" [element not visible in view rel2_bugfix_view]
No merge ".\hello.c" [to \main\4 from version zero \main\rel2_bugfix\0]
. . .
A 'findmerge' log has been written to "findmerge.log.04-Feb-99.11:00:59"
type findmerge.log.04-Feb-99.11.00.59
cleartool findmerge .\msg.c@@\main\2 -fver \main\rel2_bugfix\1 -log nul
-merge
(Attache) For the current directory subtree, compare all versions visible in the current view against the versions in another view. Print a list of versions that require merging, but do not perform the merge. For versions where no merge is required, explain why.
cmd-context findmerge . -ftag rel2_bugfix_view -whynot -print
No merge "./Makefile" [/main/3 descended from /main/2]
No merge "./cm_add.c" [element not visible in view rel2_bugfix_view]
No merge "./hello.c" [to /main/4 from version zero /main/rel2_bugfix/0]
.
.
.
A 'findmerge' log has been written to "findmerge.log.04-Feb-99.11:00:59"
shell cat findmerge.log.04-Feb-99.11:00:59
cleartool findmerge ./msg.c@@/main/2 -fver /main/rel2_bugfix/1 -log
/dev/null -merge
(ClearCase and ClearCase LT) For the current directory subtree, compare versions visible in the current view against versions on another branch, and perform any required merges. The resulting log file annotates all successful merges with a number sign (#)
.
cmd-context findmerge . -fversion \main\rel2_bugfix\LATEST -merge
Needs Merge ".\util.c" [to \main\3 from \main\rel2_bugfix\2 base
\main\rel2_bugfix\1]
Comment for all listed objects:
Merge from rel2_bugfix branch.
.
Checked out "util.c" from version "\main\3".
********************************
<<< file 1: M:\view1\george_fig_hw\src\util.c@@\main\rel2_bugfix\1
>>> file 2: .\util.c@@\main\rel2_bugfix\2
>>> file 3: .\util.c
********************************
-------[changed 7-8 file 1]--------|------[changed to 7-12 file 3]-----
if (user_env) | if (user_env) {
return user_env; | if ( strcmp(user_env,"root") == +
.
.
.
Moved contributor ".\util.c" to ".\util.c.contrib".
Output of merge is in ".\util.c".
Recorded merge of ".\util.c".
A 'findmerge' log has been written to "findmerge.log.24-Mar-99.13.23.05"
type findmerge.log.24-Mar-99.13.23.05
#cleartool findmerge .\util.c@@\main\3 -fver \main\rel2_bugfix\2 -log nul -merge -c "Merge from rel2_bugfix branch."
(Attache) For the current directory subtree, compare versions visible in the current view against versions on another branch, and perform any required merges.
cmd-context findmerge . -fversion \main\rel2_bugfix\LATEST -merge -abort
Needs Merge ".\util.c" [to \main\3 from \main\rel2_bugfix\2 base
\main\rel2_bugfix\1]
Comment for all listed objects:
Merge from rel2_bugfix branch.
.
Checked out "util.c" from version "\main\3".
*********************************
<<< file 1: M:\view1\george_fig_hw\src\util.c@@\main\rel2_bugfix\1
>>> file 2: .\util.c@@\main\rel2_bugfix\2
>>> file 3: .\util.c
********************************
-------[changed 7-8 file 1]--------|------[changed to 7-12 file 3]-----
if (user_env) | if (user_env) {
return user_env; | if ( strcmp(user_env,"root") == +
.
.
.
Output of merge is in ".\util.c".
Recorded merge of ".\util.c".
A 'findmerge' log has been written to "findmerge.log.24-Mar-99.13.23.05"
cmd-context shell type findmerge.log.24-Mar-99.13.23.05
#cleartool findmerge .\util.c@@\main\3 -fver \main\rel2_bugfix\2 -log nul
-merge -c "Merge from rel2_bugfix branch."
As in the previous commands, merge from another branch. This time, if any merge cannot be completed automatically (two or more contributors modify the same line from the base contributor), start the graphical merge utility to complete the merge.
cmd-context findmerge . -fversion /main/rel2_bugfix/LATEST -merge -gmerge
(ClearCase and ClearCase LT) For the current directory subtree, compare all versions visible in the current view to versions on another branch. Follow any VOB symbolic links. Log the results of the comparison, but do not perform the merge. The current directory contains a symbolic link to the beta directory. The findmerge command follows that link and determines that version 1 of foo.c on the bugfix branch should be merged with version 4 on the main branch.
cmd-context findmerge . -fol -fversion \main\bugfix\LATEST -print
Needs Merge "\usr2\home\ktessier\testvobs\testvob\testdir\beta\foo.c"
[to \main\4 from \main\bugfix\1 base \main\3]
Needs Merge ".\update [to \main\4 from \main\bugfix\1 base \main\2]
Log has been written to "findmerge.log.02-Jul-99.14:07:49".
(ClearCase and ClearCase LT) For the current directory subtree, compare all versions visible in the current view to versions on another branch. Do not consider versions contained in any of the current directory's subdirectories. Log the results of the comparison, but do not perform the merge. The first invocation of findmerge detects no required merges in the current directory version or the file and directory versions it contains. Invoking findmerge from the subdirectory source detects a required merge. Invoking findmerge without the -nr option at source's parent directory also detects the required merge because findmerge descends into source.
cmd-context findmerge . -nr -fversion main/bugfix/LATEST -print
% cd source
cmd-context findmerge . -nr -fversion main/bugfix/LATEST -print
Needs Merge "./update" [to /main/4 from /main/bugfix/1 base /main/2]
Log has been written to "findmerge.log.02-Jul-99.14:17:15".
(ClearCase and ClearCase LT) For the current directory only, compare the directory version visible in the current view to a version on another branch. Do not consider the versions contained in those directories. Log the results of the comparison but do not perform the merge. The findmerge command discovers that the version of the directory on the rel1 branch contains a file that is not in the version of the directory visible in the current view; therefore, version 2 of the directory on the rel1 branch should be merged with version 2 on the main branch. Because the findmerge command specifies -dir, it does not evaluate this file for merging.
cmd-context findmerge . -dir -fversion \main\rel1\LATEST -print
Needs Merge "." [(automatic) to \main\2 from \main\rel1\2 (base also
\main\2] Log has been written to "findmerge.log.03-Jul-99.15:30:46".
Invoke the Merge Manager from the command line and complete the merge using the Merge Manager.
cmd-context findmerge . -fver .../mybranch/LATEST -graphical
find, merge, update, xcleardiff, find(1)
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